# ToolKiti - Complete API Reference for AI Agents
> Generated: 2026-08-03 | Total: 127 APIs | Updated daily
> This file is optimized for LLM ingestion. Every API entry includes code examples, pricing, endpoints, and performance metrics.

---

## LLM Providers (大语言模型) — 19 APIs

### [HOT] OpenAI API
- URL: https://www.toolkiti.org/api/openai
- Description: Access GPT-4o, GPT-4, GPT-3.5, embeddings, DALL-E, Whisper, and TTS models via REST API.
- Pricing: pay-as-you-go (per token)
- Authentication: API Key (Bearer Token)
- Rate Limit: 10000 req/min (varies by tier)
- Latency: <500ms (GPT-4o)
- Max Context: 128K (GPT-4o)
- Popularity: 100/100
- SDKs: Python, Node.js, Go, Java, curl
- Endpoints:
  - https://api.openai.com/v1/chat/completions
  - https://api.openai.com/v1/embeddings
  - https://api.openai.com/v1/images/generations
  - https://api.openai.com/v1/audio/transcriptions
- Key Features:
  - GPT-4o, GPT-4, GPT-3.5 model family
  - Multimodal: vision, audio, text generation
  - Function calling & structured outputs
  - Embeddings API for semantic search
  - Fine-tuning for custom models
- Code Example (bash):
```bash
curl https://api.openai.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $OPENAI_API_KEY" \
  -d '{
    "model": "gpt-4o",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

### [POPULAR] Anthropic Claude API
- URL: https://www.toolkiti.org/api/anthropic
- Description: Access Claude 3.5 Sonnet, Haiku, and Opus models for chat, analysis, and code generation.
- Pricing: pay-as-you-go (per token)
- Authentication: API Key (x-api-key header)
- Rate Limit: 4000 req/min (Tier 4)
- Latency: <800ms (Claude 3.5 Sonnet)
- Max Context: 200K
- Popularity: 87/100
- SDKs: Python, TypeScript, Go, Java, curl
- Endpoints:
  - https://api.anthropic.com/v1/messages
  - https://api.anthropic.com/v1/complete
- Key Features:
  - Claude 3.5 Sonnet, Haiku, Opus models
  - Extended thinking for complex reasoning
  - Computer use (beta) for GUI interaction
  - Vision & document analysis
  - Constitutional AI safety
- Code Example (bash):
```bash
curl https://api.anthropic.com/v1/messages \
  -H "Content-Type: application/json" \
  -H "x-api-key: $ANTHROPIC_API_KEY" \
  -H "anthropic-version: 2023-06-01" \
  -d '{
    "model": "claude-3-5-sonnet-20241022",
    "max_tokens": 1024,
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

### [POPULAR] Google Gemini API
- URL: https://www.toolkiti.org/api/google-gemini
- Description: Access Gemini 2.0 Flash, Pro, and Ultra models with native multimodal and tool-use support.
- Pricing: free tier available, pay-as-you-go
- Authentication: API Key
- Rate Limit: 1500 req/min (paid tier)
- Latency: <600ms (Gemini 2.0 Flash)
- Max Context: 1M (Gemini 1.5 Pro)
- Popularity: 85/100
- SDKs: Python, Node.js, Go, Swift, curl
- Endpoints:
  - https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent
- Key Features:
  - Gemini 2.0 Flash, Pro models
  - 1M+ token context window
  - Native multimodal: text, image, audio, video
  - Google Search grounding integration
  - Free tier available
- Code Example (bash):
```bash
curl "https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent?key=$GEMINI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "contents": [{"parts": [{"text": "Hello!"}]}]
  }'
```

### [POPULAR] DeepSeek API
- URL: https://www.toolkiti.org/api/deepseek
- Description: Access DeepSeek-V3 and DeepSeek-R1 reasoning models with competitive pricing.
- Pricing: pay-as-you-go (per token, very low cost)
- Authentication: API Key
- Rate Limit: 500 req/min
- Latency: <1s
- Max Context: 128K
- Popularity: 83/100
- SDKs: Python, curl
- Endpoints:
  - https://api.deepseek.com/v1/chat/completions
- Key Features:
  - DeepSeek-V3 general model
  - DeepSeek-R1 reasoning model
  - Extremely competitive pricing
  - OpenAI-compatible API format
  - 128K context window
- Code Example (bash):
```bash
curl https://api.deepseek.com/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $DEEPSEEK_API_KEY" \
  -d '{
    "model": "deepseek-chat",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

###  Mistral AI API
- URL: https://www.toolkiti.org/api/mistral
- Description: Access Mistral Large, Small, and Codestral models with efficient architecture.
- Pricing: pay-as-you-go (per token)
- Authentication: API Key
- Rate Limit: 500 req/min
- Latency: <500ms
- Max Context: 128K
- Popularity: 68/100
- SDKs: Python, TypeScript, Go, curl
- Endpoints:
  - https://api.mistral.ai/v1/chat/completions
  - https://api.mistral.ai/v1/embeddings
- Key Features:
  - Mistral Large, Small, Codestral models
  - Efficient architecture for fast inference
  - Open-source model weights available
  - Function calling support
  - Multilingual performance
- Code Example (bash):
```bash
curl https://api.mistral.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $MISTRAL_API_KEY" \
  -d '{
    "model": "mistral-large-latest",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

###  Cohere API
- URL: https://www.toolkiti.org/api/cohere
- Description: Access Command-R, Embed, and Rerank models for enterprise NLP and search.
- Pricing: free tier available, pay-as-you-go
- Authentication: API Key (Bearer Token)
- Popularity: 65/100
- SDKs: Python, TypeScript, Go, Java, curl
- Endpoints:
  - https://api.cohere.com/v1/chat
  - https://api.cohere.com/v1/embed
  - https://api.cohere.com/v1/rerank
- Key Features:
  - Command-R for business RAG
  - Embed v3 for multilingual embeddings
  - Rerank for search relevance
  - Tool use & multi-step reasoning
  - Enterprise security & compliance
- Code Example (bash):
```bash
curl https://api.cohere.com/v1/chat \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $COHERE_API_KEY" \
  -d '{
    "model": "command-r-plus",
    "message": "Hello!"
  }'
```

###  Groq API
- URL: https://www.toolkiti.org/api/groq
- Description: Ultra-fast inference API for open-source LLMs using LPU inference engine.
- Pricing: free tier available, pay-as-you-go
- Authentication: API Key
- Rate Limit: 30 req/min (free tier)
- Latency: <200ms (ultra-fast)
- Max Context: 128K
- Popularity: 72/100
- SDKs: Python, curl, OpenAI-compatible SDKs
- Endpoints:
  - https://api.groq.com/openai/v1/chat/completions
- Key Features:
  - LPU inference engine for blazing speed
  - Open-source models: Llama, Mixtral, Gemma
  - Free tier for experimentation
  - OpenAI-compatible API
  - Ideal for real-time applications
- Code Example (bash):
```bash
curl https://api.groq.com/openai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $GROQ_API_KEY" \
  -d '{
    "model": "llama3-70b-8192",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

###  Together AI API
- URL: https://www.toolkiti.org/api/together-ai
- Description: Cloud platform for open-source LLM inference with 100+ models including Llama, Mixtral, and DeepSeek.
- Pricing: pay-as-you-go (per token)
- Authentication: API Key
- Popularity: 70/100
- SDKs: Python, TypeScript, curl
- Endpoints:
  - https://api.together.xyz/v1/chat/completions
- Key Features:
  - 100+ open-source models
  - Llama, Mixtral, DeepSeek, Qwen support
  - Inference & fine-tuning endpoints
  - GPU clusters for training
  - OpenAI-compatible API
- Code Example (bash):
```bash
curl https://api.together.xyz/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $TOGETHER_API_KEY" \
  -d '{
    "model": "meta-llama/Llama-3.3-70B-Instruct",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

###  Perplexity API
- URL: https://www.toolkiti.org/api/perplexity
- Description: Access Sonar search-grounded LLMs with real-time web search and citations.
- Pricing: pay-as-you-go, subscription available
- Authentication: API Key (Bearer Token)
- Rate Limit: 200 req/min
- Latency: <2s
- Max Context: 128K
- Popularity: 58/100
- SDKs: Python, curl, OpenAI-compatible SDKs
- Endpoints:
  - https://api.perplexity.ai/chat/completions
- Key Features:
  - Sonar search-grounded LLMs
  - Real-time web search with citations
  - Up-to-date information retrieval
  - OpenAI-compatible API format
  - Subscription plans for higher limits
- Code Example (bash):
```bash
curl https://api.perplexity.ai/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $PERPLEXITY_API_KEY" \
  -d '{
    "model": "sonar-pro",
    "messages": [{"role": "user", "content": "Latest AI news?"}]
  }'
```

###  Amazon Bedrock API
- URL: https://www.toolkiti.org/api/aws-bedrock
- Description: AWS managed service for foundation models from Anthropic, Meta, Mistral, Stability AI, and Amazon. Unified API with enterprise security.
- Pricing: pay-as-you-go (per token, varies by model)
- Authentication: AWS IAM (Access Key + Secret)
- Popularity: 74/100
- SDKs: Python (boto3), Node.js, Java, Go, AWS CLI
- Endpoints:
  - https://bedrock-runtime.us-east-1.amazonaws.com

###  xAI Grok API
- URL: https://www.toolkiti.org/api/xai-grok
- Description: Access Grok-2 and Grok-3 models from xAI. Real-time knowledge, long context, and image understanding capabilities.
- Pricing: pay-as-you-go (per token)
- Authentication: API Key (Bearer Token)
- Popularity: 70/100
- SDKs: Python, Node.js, curl
- Endpoints:
  - https://api.x.ai/v1/chat/completions

### [POPULAR] xAI Grok API
- URL: https://www.toolkiti.org/api/xai-grok
- Description: Access Grok-2 and Grok-3 models with real-time knowledge.
- Pricing: pay-as-you-go (per token)
- Authentication: API Key
- Popularity: 76/100
- SDKs: Python, curl
- Endpoints:
  - https://api.x.ai/v1/chat/completions

###  Qwen API
- URL: https://www.toolkiti.org/api/qwen
- Description: Alibaba Qwen2.5 series - strong multilingual models, competitive China pricing.
- Pricing: pay-as-you-go
- Authentication: API Key (Bearer Token)
- Popularity: 71/100
- SDKs: Python, Java, curl
- Endpoints:
  - https://dashscope.aliyuncs.com/api/v1/services/aigc/text-generation/generation

### [POPULAR] OpenAI Assistants API
- URL: https://www.toolkiti.org/api/openai-assistants
- Description: Build AI assistants with persistent threads, code interpreter, file search, and function calling.
- Pricing: pay-as-you-go (per token + per tool use)
- Authentication: API Key (Bearer Token)
- Popularity: 84/100
- SDKs: Python, Node.js, Go
- Endpoints:
  - https://api.openai.com/v1/assistants
  - https://api.openai.com/v1/threads

###  Cerebras API
- URL: https://www.toolkiti.org/api/cerebras
- Description: Fastest LLM inference. Llama 3.1 405B at 969 tokens/second with OpenAI-compatible API.
- Pricing: free tier (1M tokens/day) + pay-as-you-go
- Authentication: API Key
- Popularity: 54/100
- SDKs: Python, OpenAI SDK compatible
- Endpoints:
  - https://api.cerebras.ai/v1/chat/completions

###  Cloudflare Workers AI
- URL: https://www.toolkiti.org/api/cloudflare-ai
- Description: Run LLMs on Cloudflare's global edge network. Llama, Mistral, and embedding models with zero cold starts.
- Pricing: free tier + pay-per-use
- Authentication: API Token
- Popularity: 72/100
- SDKs: REST, Workers SDK
- Endpoints:
  - https://api.cloudflare.com/client/v4/accounts/{id}/ai/run/@cf/meta/llama-3.1-8b-instruct

###  DeepInfra API
- URL: https://www.toolkiti.org/api/deepinfra
- Description: Open-source model hosting with per-token pricing. Llama, Qwen, Whisper, and Stable Diffusion.
- Pricing: pay-as-you-go (from $0.05/1M tokens)
- Authentication: API Key
- Popularity: 60/100
- SDKs: Python, OpenAI SDK compatible
- Endpoints:
  - https://api.deepinfra.com/v1/openai/chat/completions

### [POPULAR] Mistral AI API
- URL: https://www.toolkiti.org/api/mistral
- Description: Mistral Large 2, Codestral, and Ministral models. Strong multilingual and coding performance.
- Pricing: pay-as-you-go (per token)
- Authentication: API Key
- Rate Limit: 500 req/min
- Latency: <500ms
- Max Context: 128K
- Popularity: 82/100
- SDKs: Python, TypeScript, Java
- Endpoints:
  - https://api.mistral.ai/v1/chat/completions
- Key Features:
  - Mistral Large, Small, Codestral models
  - Efficient architecture for fast inference
  - Open-source model weights available
  - Function calling support
  - Multilingual performance
- Code Example (bash):
```bash
curl https://api.mistral.ai/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $MISTRAL_API_KEY" \
  -d '{
    "model": "mistral-large-latest",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'
```

### [POPULAR] Cohere API
- URL: https://www.toolkiti.org/api/cohere
- Description: Command R+, Embed, and Rerank models. Enterprise-grade RAG and search infrastructure.
- Pricing: free tier + pay-as-you-go
- Authentication: API Key
- Popularity: 81/100
- SDKs: Python, Node.js, Go, Java
- Endpoints:
  - https://api.cohere.com/v1/chat
  - https://api.cohere.com/v1/embed
- Key Features:
  - Command-R for business RAG
  - Embed v3 for multilingual embeddings
  - Rerank for search relevance
  - Tool use & multi-step reasoning
  - Enterprise security & compliance
- Code Example (bash):
```bash
curl https://api.cohere.com/v1/chat \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $COHERE_API_KEY" \
  -d '{
    "model": "command-r-plus",
    "message": "Hello!"
  }'
```

---

## Machine Learning (机器学习) — 4 APIs

###  Replicate API
- URL: https://www.toolkiti.org/api/replicate
- Description: Run open-source ML models in the cloud. Supports Llama, Stable Diffusion, Whisper, and thousands more.
- Pricing: pay-as-you-go (per prediction)
- Authentication: API Key
- Popularity: 73/100
- SDKs: Python, Node.js, curl
- Endpoints:
  - https://api.replicate.com/v1/models
  - https://api.replicate.com/v1/predictions
- Key Features:
  - Thousands of open-source ML models
  - Llama, Stable Diffusion, Whisper
  - Serverless API with autoscaling
  - Custom model deployment
  - Pay-per-prediction pricing
- Code Example (python):
```python
import replicate
output = replicate.run(
    "meta/meta-llama-3.1-405b-instruct",
    input={"prompt": "Hello!"}
)
for chunk in output:
    print(chunk, end="")
```

###  Hugging Face Inference API
- URL: https://www.toolkiti.org/api/huggingface
- Description: Access 200,000+ models for inference including transformers, diffusion, and audio models.
- Pricing: free tier, pay-as-you-go for accelerated inference
- Authentication: API Key (Bearer Token)
- Popularity: 50/100
- SDKs: Python, JavaScript, curl
- Endpoints:
  - https://api-inference.huggingface.co/models/{model_id}
- Key Features:
  - 200,000+ models for inference
  - Transformers, diffusion, audio
  - Free inference API
  - Accelerated inference available
  - Community-driven model hub
- Code Example (bash):
```bash
curl https://api-inference.huggingface.co/models/meta-llama/Meta-Llama-3.1-405B-Instruct \
  -H "Authorization: Bearer $HF_API_KEY" \
  -d '{"inputs": "Hello!", "parameters": {"max_new_tokens": 100}}'
```

### [HOT] Hugging Face Hub API
- URL: https://www.toolkiti.org/api/huggingface
- Description: Access 500K+ models, datasets, and Spaces. Inference API for instant model deployment.
- Pricing: free tier + $9/month pro
- Authentication: API Token
- Popularity: 92/100
- SDKs: Python (huggingface_hub), JavaScript, REST
- Endpoints:
  - https://api-inference.huggingface.co/models/
  - https://huggingface.co/api/
- Key Features:
  - 200,000+ models for inference
  - Transformers, diffusion, audio
  - Free inference API
  - Accelerated inference available
  - Community-driven model hub
- Code Example (bash):
```bash
curl https://api-inference.huggingface.co/models/meta-llama/Meta-Llama-3.1-405B-Instruct \
  -H "Authorization: Bearer $HF_API_KEY" \
  -d '{"inputs": "Hello!", "parameters": {"max_new_tokens": 100}}'
```

### [POPULAR] Weights & Biases API
- URL: https://www.toolkiti.org/api/weights-biases
- Description: ML experiment tracking, model registry, and LLM monitoring. Track every training run.
- Pricing: free tier + paid plans
- Authentication: API Key
- Popularity: 77/100
- SDKs: Python, REST
- Endpoints:
  - https://api.wandb.ai/

---

## Image Generation (图像生成) — 8 APIs

###  Stability AI API
- URL: https://www.toolkiti.org/api/stability-ai
- Description: Generate images with Stable Diffusion 3, SDXL, and image-to-video models.
- Pricing: pay-as-you-go (per image)
- Authentication: API Key
- Popularity: 60/100
- SDKs: Python, TypeScript, curl
- Endpoints:
  - https://api.stability.ai/v1/generation/stable-diffusion-v3/text-to-image
- Key Features:
  - Stable Diffusion 3 & SDXL models
  - Text-to-image & image-to-video
  - ControlNet for precise control
  - Upscaling & outpainting tools
  - Commercial usage allowed
- Code Example (bash):
```bash
curl -X POST https://api.stability.ai/v1/generation/stable-diffusion-v3/text-to-image \
  -H "Authorization: Bearer $STABILITY_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "text_prompts": [{"text": "a cat wearing a hat"}],
    "samples": 1
  }'
```

### [POPULAR] Midjourney API
- URL: https://www.toolkiti.org/api/midjourney
- Description: Industry-leading AI image generation via Discord bot API. Produces artistic, photorealistic, and creative visuals.
- Pricing: subscription ($10-$60/mo), API via third-party
- Authentication: API Key, Discord Token
- Popularity: 75/100
- SDKs: Python (unofficial), curl
- Endpoints:
  - /imagine
  - /describe
  - /blend
- Key Features:
  - Industry-leading creative generation
  - Artistic & photorealistic output
  - Style consistency with references
  - Upscaling & variation tools
  - Active creative community
- Code Example (bash):
```bash
# Midjourney operates primarily through Discord
# Third-party APIs wrap the Discord bot:
# /imagine prompt: a serene mountain landscape --ar 16:9
```

###  Leonardo.AI API
- URL: https://www.toolkiti.org/api/leonardo-ai
- Description: AI image generation platform with fine-tuned models, real-time generation, and training API.
- Pricing: free tier (150 tokens/day), paid plans
- Authentication: API Key
- Popularity: 62/100
- SDKs: Python, curl
- Endpoints:
  - https://cloud.leonardo.ai/api/rest/v1/generations
- Key Features:
  - Fine-tuned generation models
  - Real-time canvas editing
  - Custom model training
  - API and web interface
  - Free daily tokens
- Code Example (bash):
```bash
curl https://cloud.leonardo.ai/api/rest/v1/generations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $LEONARDO_API_KEY" \
  -d '{
    "prompt": "a futuristic cityscape",
    "modelId": "b24e16ff-06e3-43eb-8d33-4416c2d75876"
  }'
```

###  Ideogram API
- URL: https://www.toolkiti.org/api/ideogram
- Description: AI image generation with superior text rendering. Known for accurate text-in-image generation.
- Pricing: free tier, paid plans from $20/mo
- Authentication: API Key
- Popularity: 48/100
- SDKs: Python, curl
- Endpoints:
  - https://api.ideogram.ai/generate
  - https://api.ideogram.ai/upscale
- Key Features:
  - Superior text rendering in images
  - Accurate in-image typography
  - Style customization options
  - Upscaling API
  - Ideal for design & marketing
- Code Example (bash):
```bash
curl https://api.ideogram.ai/generate \
  -H "Content-Type: application/json" \
  -H "Api-Key: $IDEOGRAM_API_KEY" \
  -d '{
    "image_request": {
      "prompt": "A poster that says 'Hello World'",
      "aspect_ratio": "16/9"
    }
  }'
```

###  RunwayML API
- URL: https://www.toolkiti.org/api/runway
- Description: Advanced video generation, image-to-video, and text-to-video using Gen-3 and Gen-4 models.
- Pricing: free tier (credits), Standard $15/mo, Pro $35/mo, Unlimited $100/mo
- Authentication: API Key, OAuth
- Popularity: 74/100
- SDKs: Python, JavaScript, curl
- Endpoints:
  - https://api.runwayml.com/v1/generations
  - https://api.runwayml.com/v1/image-to-video
- Key Features:
  - Gen-3 and Gen-4 video generation models
  - Image-to-video and text-to-video
  - Video-to-video style transfer
  - Green screen and rotoscoping tools
  - API for programmatic generation
- Code Example (bash):
```bash
curl https://api.runwayml.com/v1/generations \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $RUNWAY_API_KEY" \
  -d '{
    "prompt": "A cinematic drone shot...",
    "model": "gen-4"
  }'
```

###  Sora 2 API (via API Box)
- URL: https://www.toolkiti.org/api/sora2-api
- Description: AI video generation via Sora 2. Generate MP4 videos from text prompts or images with cinematic quality.
- Pricing: pay-as-you-go (credits)
- Authentication: API Key (Bearer Token)
- Popularity: 65/100
- SDKs: REST
- Endpoints:
  - https://apibox.erweima.ai/api/v1/video/generate

### [HOT] Midjourney API
- URL: https://www.toolkiti.org/api/midjourney
- Description: AI image generation via Midjourney. Create stunning artwork from text prompts with style control.
- Pricing: subscription plans from $10/month
- Authentication: Discord Bot (via API proxy)
- Popularity: 92/100
- SDKs: REST, Discord.js
- Endpoints:
  - https://api.midjourney.com/v1/imagine
- Key Features:
  - Industry-leading creative generation
  - Artistic & photorealistic output
  - Style consistency with references
  - Upscaling & variation tools
  - Active creative community
- Code Example (bash):
```bash
# Midjourney operates primarily through Discord
# Third-party APIs wrap the Discord bot:
# /imagine prompt: a serene mountain landscape --ar 16:9
```

### [POPULAR] RunwayML API
- URL: https://www.toolkiti.org/api/runwayml
- Description: AI video and image generation. Gen-3 Alpha for video, image-to-video, and creative tools.
- Pricing: free tier + $15/month
- Authentication: API Key
- Popularity: 79/100
- SDKs: Python, JavaScript, REST
- Endpoints:
  - https://api.runwayml.com/v1/generate

---

## Audio & Speech (音频语音) — 7 APIs

###  ElevenLabs API
- URL: https://www.toolkiti.org/api/elevenlabs
- Description: Text-to-speech, voice cloning, and sound effects generation with ultra-realistic voices.
- Pricing: free tier available, pay-as-you-go
- Authentication: API Key
- Popularity: 65/100
- SDKs: Python, Node.js, curl
- Endpoints:
  - https://api.elevenlabs.io/v1/text-to-speech
  - https://api.elevenlabs.io/v1/sound-generation
- Key Features:
  - Ultra-realistic text-to-speech
  - Voice cloning from samples
  - Sound effects generation
  - 29+ languages supported
  - Expressive & emotional speech
- Code Example (bash):
```bash
curl https://api.elevenlabs.io/v1/text-to-speech/21m00Tcm4TlvDq8ikWAM \
  -H "Content-Type: application/json" \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -d '{"text": "Hello from ElevenLabs!"}' \
  --output speech.mp3
```

###  AssemblyAI API
- URL: https://www.toolkiti.org/api/assemblyai
- Description: Speech-to-text, speaker diarization, sentiment analysis, and content moderation.
- Pricing: free tier available, pay-as-you-go
- Authentication: API Key
- Popularity: 50/100
- SDKs: Python, JavaScript, Go, Ruby, curl
- Endpoints:
  - https://api.assemblyai.com/v2/transcript
  - https://api.assemblyai.com/v2/stream
- Key Features:
  - High-accuracy speech-to-text
  - Speaker diarization
  - Sentiment analysis on transcripts
  - Content moderation
  - Real-time streaming support
- Code Example (bash):
```bash
curl https://api.assemblyai.com/v2/transcript \
  -H "Authorization: $ASSEMBLYAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"audio_url": "https://example.com/audio.mp3"}'
```

### [POPULAR] Suno AI Music API
- URL: https://www.toolkiti.org/api/suno
- Description: Generate original songs and music from text prompts with vocals, instruments, and multiple genres.
- Pricing: free tier (10 credits/day), Pro $10/mo, Premier $30/mo
- Authentication: API Key, OAuth
- Popularity: 78/100
- SDKs: Python, JavaScript, curl
- Endpoints:
  - https://api.suno.com/v1/generate
  - https://api.suno.com/v1/lyrics
- Key Features:
  - Text-to-music with vocals and instruments
  - Multiple genres: pop, rock, jazz, electronic
  - Custom lyrics or AI-generated lyrics
  - Song extension and remixing
  - API for programmatic music generation
- Code Example (bash):
```bash
curl https://api.suno.com/v1/generate \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $SUNO_API_KEY" \
  -d '{
    "prompt": "An upbeat pop song...",
    "style": "pop",
    "instrumental": false
  }'
```

###  Suno API (via API Box)
- URL: https://www.toolkiti.org/api/suno-api
- Description: AI music generation with vocals via Suno V5. Generate full songs from lyrics and style prompts. Female/male vocals, custom modes, instrumental tracks.
- Pricing: pay-as-you-go (credits)
- Authentication: API Key (Bearer Token)
- Popularity: 70/100
- SDKs: REST
- Endpoints:
  - https://apibox.erweima.ai/api/v1/generate
  - https://apibox.erweima.ai/api/v1/mp4/generate

### [HOT] ElevenLabs Text-to-Speech API
- URL: https://www.toolkiti.org/api/elevenlabs-tts
- Description: Ultra-realistic AI voice generation. 29+ languages, voice cloning, and streaming TTS.
- Pricing: free tier (10K chars/month) + pay-as-you-go
- Authentication: API Key
- Popularity: 93/100
- SDKs: Python, JavaScript, REST
- Endpoints:
  - https://api.elevenlabs.io/v1/text-to-speech/{voice_id}

### [HOT] ElevenLabs API
- URL: https://www.toolkiti.org/api/elevenlabs
- Description: Ultra-realistic AI text-to-speech. 29 languages, voice cloning, and streaming TTS.
- Pricing: free tier (10K chars) + pay-as-you-go
- Authentication: API Key
- Popularity: 93/100
- SDKs: Python, JavaScript, REST
- Endpoints:
  - https://api.elevenlabs.io/v1/text-to-speech/{voice_id}
- Key Features:
  - Ultra-realistic text-to-speech
  - Voice cloning from samples
  - Sound effects generation
  - 29+ languages supported
  - Expressive & emotional speech
- Code Example (bash):
```bash
curl https://api.elevenlabs.io/v1/text-to-speech/21m00Tcm4TlvDq8ikWAM \
  -H "Content-Type: application/json" \
  -H "xi-api-key: $ELEVENLABS_API_KEY" \
  -d '{"text": "Hello from ElevenLabs!"}' \
  --output speech.mp3
```

###  AssemblyAI API
- URL: https://www.toolkiti.org/api/assemblyai
- Description: Speech-to-text, speaker diarization, and entity detection. Process audio and video at scale.
- Pricing: free tier + pay-as-you-go
- Authentication: API Key
- Popularity: 70/100
- SDKs: Python, JavaScript, Go, Java
- Endpoints:
  - https://api.assemblyai.com/v2/transcript
- Key Features:
  - High-accuracy speech-to-text
  - Speaker diarization
  - Sentiment analysis on transcripts
  - Content moderation
  - Real-time streaming support
- Code Example (bash):
```bash
curl https://api.assemblyai.com/v2/transcript \
  -H "Authorization: $ASSEMBLYAI_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"audio_url": "https://example.com/audio.mp3"}'
```

---

## Vector Databases (向量数据库) — 7 APIs

### [POPULAR] Pinecone Vector Database
- URL: https://www.toolkiti.org/api/pinecone
- Description: Managed vector database for semantic search, RAG, and recommendation with millisecond latency.
- Pricing: free tier available, pay-as-you-go
- Authentication: API Key
- Popularity: 78/100
- SDKs: Python, Node.js, Go, Java, curl
- Endpoints:
  - https://{index}.svc.{environment}.pinecone.io/vectors/upsert
  - https://{index}.svc.{environment}.pinecone.io/query
- Key Features:
  - Managed vector database
  - Millisecond semantic search
  - RAG-optimized infrastructure
  - Serverless & pod-based indexes
  - Multi-cloud support
- Code Example (python):
```python
from pinecone import Pinecone
pc = Pinecone(api_key="$PINECONE_API_KEY")
index = pc.Index("my-index")
index.upsert(vectors=[
    {"id": "1", "values": [0.1, 0.2, 0.3]}
])
```

###  Weaviate Vector Database
- URL: https://www.toolkiti.org/api/weaviate
- Description: Open-source vector database with built-in vectorization, hybrid search, and GraphQL API.
- Pricing: free tier (cloud sandbox), pay-as-you-go, self-hosted
- Authentication: API Key
- Popularity: 64/100
- SDKs: Python, TypeScript, Go, Java, .NET
- Endpoints:
  - https://{cluster}.weaviate.cloud/v1/objects
  - https://{cluster}.weaviate.cloud/v1/graphql
- Key Features:
  - Open-source vector database
  - Built-in vectorization modules
  - Hybrid search (vector + keyword)
  - GraphQL API
  - Self-host or cloud
- Code Example (bash):
```bash
curl https://your-cluster.weaviate.cloud/v1/graphql \
  -H "Authorization: Bearer $WEAVIATE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query": "{ Get { Document(nearText: {concepts: ["AI"]}) { title } } }"}'
```

###  Qdrant Vector Database
- URL: https://www.toolkiti.org/api/qdrant
- Description: High-performance vector search engine written in Rust, for semantic search and recommendations.
- Pricing: free tier (cloud), pay-as-you-go, self-hosted (free)
- Authentication: API Key
- Popularity: 63/100
- SDKs: Python, TypeScript, Go, Rust, Java
- Endpoints:
  - https://{cluster}.cloud.qdrant.io:6333/collections
  - https://{cluster}.cloud.qdrant.io:6333/collections/{name}/points/search
- Key Features:
  - High-performance (Rust-based)
  - Rich filtering & payload support
  - Scalable distributed architecture
  - Self-hosted (free) & cloud tiers
  - gRPC & REST interfaces
- Code Example (bash):
```bash
curl -X POST https://your-cluster.cloud.qdrant.io:6333/collections/my-collection/points/search \
  -H "Content-Type: application/json" \
  -H "api-key: $QDRANT_API_KEY" \
  -d '{"vector": [0.1, 0.2, 0.3], "limit": 5}'
```

###  Mem0 API
- URL: https://www.toolkiti.org/api/mem0
- Description: Memory layer for AI agents. Long-term, personalized memory with automatic organization.
- Pricing: free tier + pay-as-you-go
- Authentication: API Key
- Popularity: 46/100
- SDKs: Python, JavaScript
- Endpoints:
  - https://api.mem0.ai/v1/memories

### [POPULAR] Pinecone API
- URL: https://www.toolkiti.org/api/pinecone
- Description: Managed vector database for AI. Serverless, with metadata filtering and hybrid search.
- Pricing: free tier (2GB) + $0.096/GB/month
- Authentication: API Key
- Popularity: 88/100
- SDKs: Python, Node.js, Go, Java
- Endpoints:
  - https://{index}-{project}.svc.{env}.pinecone.io
- Key Features:
  - Managed vector database
  - Millisecond semantic search
  - RAG-optimized infrastructure
  - Serverless & pod-based indexes
  - Multi-cloud support
- Code Example (python):
```python
from pinecone import Pinecone
pc = Pinecone(api_key="$PINECONE_API_KEY")
index = pc.Index("my-index")
index.upsert(vectors=[
    {"id": "1", "values": [0.1, 0.2, 0.3]}
])
```

### [POPULAR] Weaviate API
- URL: https://www.toolkiti.org/api/weaviate
- Description: Open-source vector database with GraphQL and REST APIs. Hybrid keyword + vector search.
- Pricing: free (self-hosted) + cloud plans
- Authentication: API Key
- Popularity: 75/100
- SDKs: Python, JavaScript, Go, Java
- Endpoints:
  - https://{cluster}.weaviate.network/v1/graphql
- Key Features:
  - Open-source vector database
  - Built-in vectorization modules
  - Hybrid search (vector + keyword)
  - GraphQL API
  - Self-host or cloud
- Code Example (bash):
```bash
curl https://your-cluster.weaviate.cloud/v1/graphql \
  -H "Authorization: Bearer $WEAVIATE_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"query": "{ Get { Document(nearText: {concepts: ["AI"]}) { title } } }"}'
```

###  Qdrant API
- URL: https://www.toolkiti.org/api/qdrant
- Description: High-performance vector search engine. Rust-based, with quantization and filtering at scale.
- Pricing: free (self-hosted) + cloud from $25/month
- Authentication: API Key
- Popularity: 68/100
- SDKs: Python, Rust, Go, JavaScript
- Endpoints:
  - https://{cluster}.qdrant.io/collections
- Key Features:
  - High-performance (Rust-based)
  - Rich filtering & payload support
  - Scalable distributed architecture
  - Self-hosted (free) & cloud tiers
  - gRPC & REST interfaces
- Code Example (bash):
```bash
curl -X POST https://your-cluster.cloud.qdrant.io:6333/collections/my-collection/points/search \
  -H "Content-Type: application/json" \
  -H "api-key: $QDRANT_API_KEY" \
  -d '{"vector": [0.1, 0.2, 0.3], "limit": 5}'
```

---

## GPU Cloud (GPU 云) — 4 APIs

###  Modal GPU Cloud
- URL: https://www.toolkiti.org/api/modal
- Description: Serverless GPU compute platform for AI inference, batch processing, and model deployment.
- Pricing: pay-as-you-go (per second), free tier available
- Authentication: API Key (Token)
- Popularity: 52/100
- SDKs: Python SDK
- Endpoints:
  - https://api.modal.com/v1/functions
  - https://api.modal.com/v1/volumes
- Key Features:
  - Serverless GPU compute
  - Pay-per-second pricing
  - Python SDK with local dev
  - Auto-scaling infrastructure
  - Volumes & secret management
- Code Example (python):
```python
import modal
app = modal.App("my-app")

@app.function(gpu="A100")
def generate(prompt: str):
    # Your AI inference code here
    return f"Generated from: {prompt}"
```

###  RunPod GPU Cloud
- URL: https://www.toolkiti.org/api/runpod
- Description: GPU cloud platform with serverless endpoints, pods, and auto-scaling for AI workloads.
- Pricing: pay-as-you-go (per hour/sec), cheap spot instances
- Authentication: API Key
- Popularity: 50/100
- SDKs: Python, curl
- Endpoints:
  - https://api.runpod.ai/v2/{endpoint_id}/runsync
  - https://api.runpod.ai/v1/pods
- Key Features:
  - GPU pods & serverless endpoints
  - Cheap spot instances
  - Auto-scaling for workloads
  - Pre-built templates available
  - Community serverless templates
- Code Example (bash):
```bash
curl https://api.runpod.ai/v2/YOUR_ENDPOINT_ID/runsync \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $RUNPOD_API_KEY" \
  -d '{"input": {"prompt": "Hello"}}'
```

###  Modal API
- URL: https://www.toolkiti.org/api/modal
- Description: Serverless GPU cloud for AI workloads. Run Python functions on A100/H100 with cold start under 1s.
- Pricing: pay-per-second ($1.10/hr A100)
- Authentication: API Token
- Popularity: 55/100
- SDKs: Python
- Endpoints:
  - https://api.modal.com/
- Key Features:
  - Serverless GPU compute
  - Pay-per-second pricing
  - Python SDK with local dev
  - Auto-scaling infrastructure
  - Volumes & secret management
- Code Example (python):
```python
import modal
app = modal.App("my-app")

@app.function(gpu="A100")
def generate(prompt: str):
    # Your AI inference code here
    return f"Generated from: {prompt}"
```

###  Banana API
- URL: https://www.toolkiti.org/api/banana
- Description: Deploy ML models on GPU with one click. Cold starts optimized for inference workloads.
- Pricing: pay-per-use
- Authentication: API Key
- Popularity: 42/100
- SDKs: Python, JavaScript
- Endpoints:
  - https://api.banana.dev/

---

## Developer Tools (开发工具) — 34 APIs

###  LangChain Framework
- URL: https://www.toolkiti.org/api/langchain
- Description: Framework for building LLM-powered applications with chains, agents, RAG, and tool integration.
- Pricing: open-source (free), LangSmith/LangGraph Cloud have paid tiers
- Authentication: API Key (for cloud services)
- Popularity: 55/100
- SDKs: Python, TypeScript/JavaScript, Java (LangChain4j)
- Endpoints:
  - N/A (Framework, not API)
- Key Features:
  - Chain composition framework
  - Agent & tool integration
  - RAG building blocks
  - LangSmith observability
  - Multi-provider support
- Code Example (python):
```python
from langchain_core.prompts import ChatPromptTemplate
from langchain_openai import ChatOpenAI

prompt = ChatPromptTemplate.from_template("Tell me a {topic} joke")
model = ChatOpenAI(model="gpt-4o")
chain = prompt | model

result = chain.invoke({"topic": "programming"})
print(result.content)
```

### [HOT] GitHub REST & GraphQL API
- URL: https://www.toolkiti.org/api/github-api
- Description: Full GitHub platform API: repos, issues, PRs, Actions, search, code scanning, and more.
- Pricing: free (5000 req/hr for authenticated), unlimited for public repos
- Authentication: Personal Access Token, OAuth App, GitHub App
- Rate Limit: 5000 req/hr (authenticated)
- Popularity: 92/100
- SDKs: Octokit (JS/TS), PyGithub, Go-Github, curl
- Endpoints:
  - https://api.github.com
  - https://api.github.com/graphql
- Key Features:
  - Full GitHub platform API
  - REST & GraphQL interfaces
  - Repos, issues, PRs, Actions
  - Code scanning & security
  - Generous free tier
- Code Example (bash):
```bash
curl -H "Authorization: token $GITHUB_TOKEN" \
  -H "Accept: application/vnd.github+json" \
  https://api.github.com/user/repos?per_page=5
```

### [POPULAR] Supabase API
- URL: https://www.toolkiti.org/api/supabase
- Description: Open-source Firebase alternative: PostgreSQL database, auth, realtime subscriptions, and storage API.
- Pricing: free tier (2 projects, 500 MB DB), paid plans
- Authentication: API Key (anon/service_role), OAuth
- Popularity: 76/100
- SDKs: JavaScript/TypeScript, Python, Dart, Go, Swift, Kotlin
- Endpoints:
  - https://[project].supabase.co/rest/v1/
  - https://[project].supabase.co/auth/v1/
- Key Features:
  - Open-source Firebase alternative
  - PostgreSQL database with REST API
  - Built-in auth & Row Level Security
  - Realtime subscriptions
  - File storage
- Code Example (bash):
```bash
curl "https://your-project.supabase.co/rest/v1/users" \
  -H "apikey: $SUPABASE_ANON_KEY" \
  -H "Authorization: Bearer $SUPABASE_ANON_KEY"
```

###  Resend API
- URL: https://www.toolkiti.org/api/resend
- Description: Email API for developers. Send transactional and marketing emails with high deliverability.
- Pricing: free tier (3000 emails/mo for first 3 months), paid plans
- Authentication: API Key
- Popularity: 55/100
- SDKs: JavaScript/TypeScript, Python, Go, PHP, Ruby, Elixir, curl
- Endpoints:
  - https://api.resend.com/emails
- Key Features:
  - Email API for developers
  - High deliverability rates
  - React Email templates
  - Analytics & tracking
  - Generous free tier
- Code Example (bash):
```bash
curl https://api.resend.com/emails \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "onboarding@resend.dev",
    "to": ["user@example.com"],
    "subject": "Hello!",
    "text": "Welcome to Resend"
  }'
```

### [HOT] Bolt.new - AI Web App Builder
- URL: https://www.toolkiti.org/api/bolt
- Description: AI-powered full-stack web app builder. Generate, deploy, and iterate apps directly from prompts.
- Pricing: free tier, Starter $20/mo, Pro $100/mo (includes Bolt AI credits)
- Authentication: OAuth (GitHub/Google)
- Popularity: 90/100
- SDKs: Web SDK, CLI
- Endpoints:
  - https://api.bolt.new/v1/prompts
  - https://api.bolt.new/v1/deploy
- Key Features:
  - Full-stack app generation from prompts
  - Built-in deployment to production
  - Supports React, Vue, Svelte, Next.js
  - Real-time preview during development
  - Database and API integration built-in
- Code Example (text):
```text
Build a task management app with a React frontend, PostgreSQL database, user authentication, and drag-and-drop task reordering.
```

### [POPULAR] Lovable AI App Builder
- URL: https://www.toolkiti.org/api/lovable
- Description: Describe your app idea and Lovable builds it instantly with Supabase backend, auth, and database.
- Pricing: free tier, Starter $25/mo, Pro $75/mo
- Authentication: OAuth (GitHub/Google)
- Popularity: 85/100
- SDKs: Web UI, Supabase Integration
- Endpoints:
  - N/A (Web Platform)
- Key Features:
  - Describe-to-app with Supabase integration
  - Instant auth, database, and storage
  - Visual preview with live editing
  - One-click deployment
  - GPT-4 powered app generation
- Code Example (text):
```text
Create a SaaS landing page with a pricing table, Stripe checkout integration, and a user dashboard.
```

### [POPULAR] Replit AI Agent
- URL: https://www.toolkiti.org/api/replit
- Description: Browser-based IDE with AI Agent that builds full apps from prompts. Supports Python, JS, Go and 50+ languages.
- Pricing: free tier, Hacker $25/mo, Pro $200/mo
- Authentication: OAuth (GitHub/Google), API Key
- Popularity: 88/100
- SDKs: Python SDK, JavaScript SDK, CLI
- Endpoints:
  - https://api.replit.com/v1/prompt
  - https://api.replit.com/v1/deployments
- Key Features:
  - AI Agent builds apps from description
  - 50+ language support in browser IDE
  - One-click deploy to production
  - Multiplayer editing and collaboration
  - Built-in database and secrets management
- Code Example (text):
```text
Build a real-time chat application with WebSocket support, user authentication, message history, and file sharing.
```

### [POPULAR] Vercel AI SDK
- URL: https://www.toolkiti.org/api/vercel-ai-sdk
- Description: Open-source TypeScript toolkit for building AI-powered applications with streaming, tool calls, and multi-provider support.
- Pricing: free (open-source), Vercel hosting additional
- Authentication: API Key (for provider integrations)
- Popularity: 86/100
- SDKs: TypeScript/JavaScript, Python (via LangChain)
- Endpoints:
  - N/A (SDK - integrates with 20+ providers)
- Key Features:
  - Streaming responses with React Server Components
  - Tool calling and function calling
  - Multi-provider support (OpenAI, Anthropic, etc.)
  - AI SDK Core for framework-agnostic use
  - Production-ready with edge deployment
- Code Example (typescript):
```typescript
import { streamText } from 'ai';
import { openai } from '@ai-sdk/openai';

export async function POST(req: Request) {
  const { messages } = await req.json();
  const result = streamText({
    model: openai('gpt-4o'),
    messages,
  });
  return result.toDataStreamResponse();
}
```

###  Clerk Auth API
- URL: https://www.toolkiti.org/api/clerk
- Description: Complete user management and authentication for modern apps. Social login, MFA, session management, and organization support.
- Pricing: free tier (10K MAU), Pro from $25/mo
- Authentication: API Key (Bearer Token)
- Popularity: 72/100
- SDKs: JavaScript, React, Next.js, Node.js, Go, Python
- Endpoints:
  - https://api.clerk.com/v1/users
  - https://api.clerk.com/v1/organizations

###  Neon Serverless Postgres
- URL: https://www.toolkiti.org/api/neon
- Description: Serverless PostgreSQL with branching, autoscaling, and bottomless storage. Database branching for CI/CD and preview environments.
- Pricing: free tier (0.5GB), paid from $19/mo
- Authentication: API Key
- Popularity: 68/100
- SDKs: JavaScript, Node.js, Python, SQL
- Endpoints:
  - https://console.neon.tech/api/v2

### [POPULAR] Twilio Communications API
- URL: https://www.toolkiti.org/api/twilio
- Description: SMS, voice, video, and email communications API. Send messages, make calls, and verify users globally.
- Pricing: pay-as-you-go (SMS from $0.0079/msg)
- Authentication: API Key (Account SID + Auth Token)
- Popularity: 82/100
- SDKs: Node.js, Python, Go, Java, Ruby, PHP, C#
- Endpoints:
  - https://api.twilio.com/2010-04-01/Accounts

### [POPULAR] SendGrid Email API
- URL: https://www.toolkiti.org/api/sendgrid
- Description: Transactional and marketing email delivery API. High deliverability, templates, and real-time analytics.
- Pricing: free tier (100 emails/day), paid from $19.95/mo
- Authentication: API Key
- Popularity: 76/100
- SDKs: Node.js, Python, Go, Java, Ruby, PHP, C#
- Endpoints:
  - https://api.sendgrid.com/v3/mail/send

###  CrewAI Agent Framework
- URL: https://www.toolkiti.org/api/crewai
- Description: Framework for orchestrating role-based AI agents that collaborate on complex tasks. Define agents with roles, goals, and tools.
- Pricing: open-source (free), CrewAI Enterprise available
- Authentication: API Key (OpenAI-compatible)
- Popularity: 65/100
- SDKs: Python
- Endpoints:

###  LangSmith Observability
- URL: https://www.toolkiti.org/api/langsmith
- Description: LLM application observability, testing, and evaluation platform. Trace, monitor, and debug LLM chains and agents in production.
- Pricing: free tier, paid from $39/mo
- Authentication: API Key
- Popularity: 62/100
- SDKs: Python, TypeScript
- Endpoints:
  - https://api.smith.langchain.com

###  Helicone AI Observability
- URL: https://www.toolkiti.org/api/helicone
- Description: Open-source LLM observability for cost, latency, and quality. Drop-in proxy for OpenAI with logging, caching, and rate limiting.
- Pricing: free tier (100K req/mo), paid from $20/mo
- Authentication: API Key
- Popularity: 55/100
- SDKs: Python, Node.js, curl
- Endpoints:
  - https://api.helicone.ai/v1

###  Browserbase Headless Browser API
- URL: https://www.toolkiti.org/api/browserbase
- Description: Headless browser infrastructure for AI agents. Run Playwright/Puppeteer scripts at scale with stealth mode and session management.
- Pricing: free tier, paid from $99/mo
- Authentication: API Key
- Popularity: 52/100
- SDKs: JavaScript, Python, Playwright, Puppeteer
- Endpoints:
  - https://api.browserbase.com/v1

###  PlanetScale MySQL Platform
- URL: https://www.toolkiti.org/api/planetscale
- Description: Serverless MySQL platform with branching workflow. Database branches for schema changes with zero-downtime deploys.
- Pricing: free tier (1B row reads/mo), paid from $39/mo
- Authentication: API Key (Service Token)
- Popularity: 57/100
- SDKs: Node.js, Python, Go, CLI
- Endpoints:
  - https://api.planetscale.com/v1

###  Contentful Headless CMS
- URL: https://www.toolkiti.org/api/contentful
- Description: Headless content management platform with GraphQL and REST APIs. Manage structured content with rich media and localization.
- Pricing: free tier, paid from $300/mo
- Authentication: API Key (Content Delivery/Management)
- Popularity: 54/100
- SDKs: JavaScript, Node.js, Python, Ruby, PHP, Java
- Endpoints:
  - https://cdn.contentful.com
  - https://api.contentful.com

###  Sanity CMS API
- URL: https://www.toolkiti.org/api/sanity
- Description: Composable content platform with real-time collaboration. GROQ query language and customizable content studio.
- Pricing: free tier, paid from $15/mo
- Authentication: API Key
- Popularity: 56/100
- SDKs: JavaScript, React, Next.js, Gatsby
- Endpoints:
  - https://api.sanity.io/v1

###  Microsoft AutoGen Framework
- URL: https://www.toolkiti.org/api/autogen
- Description: Multi-agent conversation framework from Microsoft Research. Build AI agent teams that converse, collaborate, and complete tasks autonomously.
- Pricing: open-source (free)
- Authentication: None (library)
- Popularity: 48/100
- SDKs: Python, .NET
- Endpoints:

###  Resend API
- URL: https://www.toolkiti.org/api/resend
- Description: Modern email API for developers with React email components.
- Pricing: free tier (100 emails/day) + pay-as-you-go
- Authentication: API Key
- Popularity: 73/100
- SDKs: Node.js, Python, Go, Ruby, PHP
- Endpoints:
  - https://api.resend.com/emails
- Key Features:
  - Email API for developers
  - High deliverability rates
  - React Email templates
  - Analytics & tracking
  - Generous free tier
- Code Example (bash):
```bash
curl https://api.resend.com/emails \
  -H "Authorization: Bearer $RESEND_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "from": "onboarding@resend.dev",
    "to": ["user@example.com"],
    "subject": "Hello!",
    "text": "Welcome to Resend"
  }'
```

### [POPULAR] Sentry API
- URL: https://www.toolkiti.org/api/sentry
- Description: Application monitoring: error tracking, performance, session replay.
- Pricing: free tier + usage-based
- Authentication: API Key (Auth Token)
- Popularity: 80/100
- SDKs: Python, JavaScript, Go, Java, Ruby, PHP, .NET
- Endpoints:
  - https://sentry.io/api/0/projects/

###  API Box
- URL: https://www.toolkiti.org/api/apibox
- Description: AI API aggregation platform providing Suno music, Sora video, and file upload APIs at competitive prices.
- Pricing: pay-as-you-go (credits per API)
- Authentication: API Key (Bearer Token)
- Popularity: 66/100
- SDKs: REST
- Endpoints:
  - https://apibox.erweima.ai/api/v1/generate
  - https://apibox.erweima.ai/api/v1/mp4/generate

### [HOT] GitHub REST API
- URL: https://www.toolkiti.org/api/github
- Description: Manage repos, issues, PRs, actions, and users. The backbone of open-source automation.
- Pricing: free tier (5000 req/hr) + paid plans
- Authentication: Personal Access Token, OAuth 2.0, GitHub App
- Popularity: 96/100
- SDKs: Octokit (JS/Ruby/.NET), REST, GraphQL
- Endpoints:
  - https://api.github.com/repos/{owner}/{repo}
  - https://api.github.com/graphql

### [POPULAR] Linear API
- URL: https://www.toolkiti.org/api/linear
- Description: Modern issue tracking and project management with GraphQL API. Built for speed.
- Pricing: free tier + $8/user/month
- Authentication: API Key, OAuth 2.0
- Popularity: 81/100
- SDKs: JavaScript, TypeScript, GraphQL
- Endpoints:
  - https://api.linear.app/graphql

### [POPULAR] Notion API
- URL: https://www.toolkiti.org/api/notion
- Description: Read, create, and update Notion pages and databases programmatically.
- Pricing: free tier
- Authentication: OAuth 2.0, Internal Integration Token
- Popularity: 85/100
- SDKs: JavaScript, Python, REST
- Endpoints:
  - https://api.notion.com/v1/pages
  - https://api.notion.com/v1/databases

###  Clerk API
- URL: https://www.toolkiti.org/api/clerk
- Description: Complete user management and authentication. Drop-in UI components for React and Next.js.
- Pricing: free tier (10K MAU) + $25/month
- Authentication: API Key (Secret Key)
- Popularity: 74/100
- SDKs: React, Next.js, JavaScript, Go, Ruby, Python
- Endpoints:
  - https://api.clerk.com/v1/users
  - https://api.clerk.com/v1/organizations

###  Mapbox API
- URL: https://www.toolkiti.org/api/mapbox
- Description: Custom maps, geocoding, navigation, and location services for web and mobile.
- Pricing: free tier (50K req/month) + pay-as-you-go
- Authentication: API Key (Access Token)
- Popularity: 67/100
- SDKs: JavaScript, iOS, Android, React Native
- Endpoints:
  - https://api.mapbox.com/geocoding/v5/
  - https://api.mapbox.com/styles/v1/

### [HOT] LangChain Platform
- URL: https://www.toolkiti.org/api/langchain
- Description: Framework and platform for building LLM applications. LangSmith for observability, LangServe for deployment.
- Pricing: free tier + developer plan $39/month
- Authentication: API Key
- Popularity: 91/100
- SDKs: Python, JavaScript, TypeScript
- Endpoints:
  - https://api.smith.langchain.com
- Key Features:
  - Chain composition framework
  - Agent & tool integration
  - RAG building blocks
  - LangSmith observability
  - Multi-provider support
- Code Example (python):
```python
from langchain_core.prompts import ChatPromptTemplate
from langchain_openai import ChatOpenAI

prompt = ChatPromptTemplate.from_template("Tell me a {topic} joke")
model = ChatOpenAI(model="gpt-4o")
chain = prompt | model

result = chain.invoke({"topic": "programming"})
print(result.content)
```

###  Helicone API
- URL: https://www.toolkiti.org/api/helicone
- Description: LLM observability platform. Monitor costs, latency, and usage across OpenAI, Anthropic, and more.
- Pricing: free tier + $20/month
- Authentication: API Key
- Popularity: 42/100
- SDKs: REST, Python, JavaScript
- Endpoints:
  - https://api.helicone.ai/v1/log

###  Firecrawl API
- URL: https://www.toolkiti.org/api/firecrawl
- Description: Turn websites into LLM-ready markdown. Crawl, scrape, and extract structured data.
- Pricing: free tier + $19/month
- Authentication: API Key
- Rate Limit: 500 pages/mo (free tier)
- Popularity: 57/100
- SDKs: Python, JavaScript, REST
- Endpoints:
  - https://api.firecrawl.dev/v1/scrape
  - https://api.firecrawl.dev/v1/crawl
- Key Features:
  - Web scraping for AI agents
  - Converts pages to clean Markdown
  - Supports JS-rendered pages
  - Crawl entire websites
  - Free tier available
- Code Example (bash):
```bash
curl https://api.firecrawl.dev/v1/scrape \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $FIRECRAWL_API_KEY" \
  -d '{"url": "https://example.com", "formats": ["markdown"]}'
```

###  Browserbase API
- URL: https://www.toolkiti.org/api/browserbase
- Description: Headless browser infrastructure for AI agents. Stealth mode, proxies, and session management.
- Pricing: free tier + $49/month
- Authentication: API Key
- Popularity: 44/100
- SDKs: JavaScript, Python, Playwright
- Endpoints:
  - https://api.browserbase.com/v1/sessions

### [POPULAR] Anthropic MCP SDK
- URL: https://www.toolkiti.org/api/anthropic-mcp
- Description: Official Model Context Protocol SDK. Build MCP servers and clients for AI agent tool integration.
- Pricing: free (open source)
- Authentication: None
- Popularity: 85/100
- SDKs: TypeScript, Python, Kotlin
- Endpoints:
  - https://github.com/modelcontextprotocol/servers

###  E2B API
- URL: https://www.toolkiti.org/api/e2b
- Description: Secure cloud sandboxes for AI code execution. Run untrusted code with filesystem and internet access.
- Pricing: free tier + pay-as-you-go
- Authentication: API Key
- Popularity: 50/100
- SDKs: Python, JavaScript
- Endpoints:
  - https://api.e2b.dev/

---

## Web Search (搜索服务) — 12 APIs

### [HOT] Tavily Search API
- URL: https://www.toolkiti.org/api/tavily
- Description: AI-native search engine optimized for LLMs and AI agents. Real-time web data with structured results.
- Pricing: free tier (1000 credits/mo), pay-as-you-go
- Authentication: API Key
- Rate Limit: 100 req/day (free tier)
- Latency: <1s
- Popularity: 95/100
- SDKs: Python, curl
- Endpoints:
  - https://api.tavily.com/search
- Key Features:
  - AI-native search for agents
  - Structured results with summaries
  - Real-time web data extraction
  - Topic-specific deep searches
  - Free tier for development
- Code Example (python):
```python
from tavily import TavilyClient
client = TavilyClient(api_key="$TAVILY_API_KEY")
results = client.search(query="latest AI developments")
print(results["results"])
```

### [POPULAR] Brave Search API
- URL: https://www.toolkiti.org/api/brave-search
- Description: Independent search index API with web, news, image, and video results. Privacy-focused.
- Pricing: free tier (2000 queries/mo), paid plans
- Authentication: API Key
- Rate Limit: 2000 queries/mo (free)
- Latency: <500ms
- Popularity: 88/100
- SDKs: curl, Python, JavaScript
- Endpoints:
  - https://api.search.brave.com/res/v1/web/search
- Key Features:
  - Independent search index
  - Web, news, image & video search
  - Privacy-focused, no tracking
  - Rich result data (ratings, reviews)
  - Free tier available
- Code Example (bash):
```bash
curl "https://api.search.brave.com/res/v1/web/search?q=AI+tools" \
  -H "Accept: application/json" \
  -H "Accept-Encoding: gzip" \
  -H "X-Subscription-Token: $BRAVE_API_KEY"
```

### [HOT] Serper API
- URL: https://www.toolkiti.org/api/serper
- Description: Fast Google Search API with rich SERP data including knowledge graph, shopping, and organic results.
- Pricing: free tier (2500 queries), pay-as-you-go from $50/mo
- Authentication: API Key
- Rate Limit: 2500 queries free once
- Latency: <500ms
- Popularity: 90/100
- SDKs: Python, Node.js, Go, curl
- Endpoints:
  - https://google.serper.dev/search
- Key Features:
  - Fast Google SERP API
  - Knowledge graph & shopping data
  - Organic, maps, images results
  - High reliability & uptime
  - Simple REST API
- Code Example (bash):
```bash
curl https://google.serper.dev/search \
  -H "X-API-KEY: $SERPER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"q": "best AI tools 2026"}'
```

### [POPULAR] Jina AI API
- URL: https://www.toolkiti.org/api/jina-ai
- Description: Universal AI services: embeddings (8K+ dimensions), Reader API for web content, and segmentation.
- Pricing: free tier, pay-as-you-go
- Authentication: API Key
- Popularity: 80/100
- SDKs: Python, TypeScript, curl
- Endpoints:
  - https://api.jina.ai/v1/embeddings
  - https://r.jina.ai/ (Reader)
  - https://s.jina.ai/ (Segmenter)
- Key Features:
  - 8K+ dimensional embeddings
  - Reader API: web to LLM-ready content
  - Segmenter for text chunking
  - Open-source models available
  - CLIP & ColBERT architectures
- Code Example (bash):
```bash
curl https://api.jina.ai/v1/embeddings \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $JINA_API_KEY" \
  -d '{"input": ["Hello world"], "model": "jina-embeddings-v3"}'
```

### [POPULAR] Exa Search API
- URL: https://www.toolkiti.org/api/exa
- Description: AI-powered search engine built for embeddings-based semantic search. Finds content by meaning, not keywords.
- Pricing: free tier (1000 queries/mo), paid plans
- Authentication: API Key
- Rate Limit: 1000 queries/mo (free tier)
- Popularity: 82/100
- SDKs: Python, TypeScript, curl
- Endpoints:
  - https://api.exa.ai/search
  - https://api.exa.ai/contents
- Key Features:
  - Semantic search by meaning
  - Embeddings-based content discovery
  - Similarity & content retrieval
  - AI agent optimized
  - Developer-friendly API
- Code Example (bash):
```bash
curl https://api.exa.ai/search \
  -H "Content-Type: application/json" \
  -H "x-api-key: $EXA_API_KEY" \
  -d '{"query": "AI agents best practices", "numResults": 5}'
```

### [POPULAR] Firecrawl API
- URL: https://www.toolkiti.org/api/firecrawl
- Description: Web scraping and crawling API optimized for AI. Converts web pages into clean markdown or structured data.
- Pricing: free tier (500 pages/mo), paid plans
- Authentication: API Key
- Rate Limit: 500 pages/mo (free tier)
- Popularity: 77/100
- SDKs: Python, Node.js, Go, curl
- Endpoints:
  - https://api.firecrawl.dev/v1/scrape
  - https://api.firecrawl.dev/v1/crawl
- Key Features:
  - Web scraping for AI agents
  - Converts pages to clean Markdown
  - Supports JS-rendered pages
  - Crawl entire websites
  - Free tier available
- Code Example (bash):
```bash
curl https://api.firecrawl.dev/v1/scrape \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $FIRECRAWL_API_KEY" \
  -d '{"url": "https://example.com", "formats": ["markdown"]}'
```

###  You.com API
- URL: https://www.toolkiti.org/api/youcom
- Description: AI search API with web results, news, images, and real-time data. Includes LLM chat integration.
- Pricing: free tier, Pro $20/mo, custom enterprise pricing
- Authentication: API Key
- Popularity: 70/100
- SDKs: Python, JavaScript, curl
- Endpoints:
  - https://api.you.com/v1/search
  - https://api.you.com/v1/chat
- Key Features:
  - AI-powered web search results
  - Real-time news and data
  - LLM chat integration
  - Image and video search support
  - Developer-friendly API
- Code Example (bash):
```bash
curl "https://api.you.com/v1/search?query=latest+AI+news" \
  -H "X-API-Key: $YOU_API_KEY" \
  -H "Accept: application/json"
```

###  Apify Web Scraping API
- URL: https://www.toolkiti.org/api/apify
- Description: Web scraping and browser automation platform with 1,500+ pre-built actors. Extract data from any website at scale.
- Pricing: free tier ($5 credit), pay-as-you-go
- Authentication: API Key
- Popularity: 58/100
- SDKs: JavaScript, Python, CLI
- Endpoints:
  - https://api.apify.com/v2

###  Tavily API
- URL: https://www.toolkiti.org/api/tavily
- Description: AI-optimized web search API. Built for AI agents with structured, cited results.
- Pricing: free tier (1000 req/month) + paid plans
- Authentication: API Key
- Rate Limit: 100 req/day (free tier)
- Latency: <1s
- Popularity: 61/100
- SDKs: Python, JavaScript, REST
- Endpoints:
  - https://api.tavily.com/search
- Key Features:
  - AI-native search for agents
  - Structured results with summaries
  - Real-time web data extraction
  - Topic-specific deep searches
  - Free tier for development
- Code Example (python):
```python
from tavily import TavilyClient
client = TavilyClient(api_key="$TAVILY_API_KEY")
results = client.search(query="latest AI developments")
print(results["results"])
```

###  Exa API
- URL: https://www.toolkiti.org/api/exa
- Description: Semantic search API for AI. Content-based search, not keyword matching.
- Pricing: free tier + pay-as-you-go
- Authentication: API Key
- Rate Limit: 1000 queries/mo (free tier)
- Popularity: 53/100
- SDKs: Python, JavaScript
- Endpoints:
  - https://api.exa.ai/search
- Key Features:
  - Semantic search by meaning
  - Embeddings-based content discovery
  - Similarity & content retrieval
  - AI agent optimized
  - Developer-friendly API
- Code Example (bash):
```bash
curl https://api.exa.ai/search \
  -H "Content-Type: application/json" \
  -H "x-api-key: $EXA_API_KEY" \
  -d '{"query": "AI agents best practices", "numResults": 5}'
```

###  Jina AI API
- URL: https://www.toolkiti.org/api/jina
- Description: Neural search, embeddings, reranking, and Reader API for turning URLs into LLM-friendly text.
- Pricing: free tier + pay-as-you-go
- Authentication: API Key
- Popularity: 63/100
- SDKs: REST, Python
- Endpoints:
  - https://r.jina.ai/http://{url}
  - https://api.jina.ai/v1/embeddings

### [POPULAR] Perplexity API
- URL: https://www.toolkiti.org/api/perplexity
- Description: AI-powered search API with real-time web access. Returns cited, up-to-date answers.
- Pricing: pay-as-you-go
- Authentication: API Key
- Rate Limit: 200 req/min
- Latency: <2s
- Max Context: 128K
- Popularity: 78/100
- SDKs: Python, REST
- Endpoints:
  - https://api.perplexity.ai/chat/completions
- Key Features:
  - Sonar search-grounded LLMs
  - Real-time web search with citations
  - Up-to-date information retrieval
  - OpenAI-compatible API format
  - Subscription plans for higher limits
- Code Example (bash):
```bash
curl https://api.perplexity.ai/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer $PERPLEXITY_API_KEY" \
  -d '{
    "model": "sonar-pro",
    "messages": [{"role": "user", "content": "Latest AI news?"}]
  }'
```

---

## AI IDE (AI 编辑器) — 2 APIs

### [HOT] Cursor AI IDE
- URL: https://www.toolkiti.org/api/cursor
- Description: AI-first code editor with deep Copilot++ integration, Composer for multi-file edits, and codebase-wide context understanding.
- Pricing: free tier, Pro $20/mo, Business $40/mo
- Authentication: OAuth (GitHub/Google)
- Popularity: 96/100
- SDKs: VS Code Extension, CLI
- Endpoints:
  - Built-in IDE (no REST API)
- Key Features:
  - Copilot++ for multi-line code suggestions
  - Composer for multi-file AI edits
  - Codebase-wide context with @ mentions
  - Built-in chat with GPT-4o, Claude, and more
  - Terminal AI commands and debugging
- Code Example (text):
```text
You are an expert TypeScript developer. Always use functional components with hooks. Prefer arrow functions. Use zod for runtime validation.
```

### [HOT] Windsurf AI IDE
- URL: https://www.toolkiti.org/api/windsurf
- Description: AI-native IDE with Cascade agentic flow, tab completion, inline editing, and terminal AI assistance.
- Pricing: free tier, Pro $15/mo, Pro Ultimate $30/mo
- Authentication: OAuth (Google/GitHub/Email)
- Popularity: 93/100
- SDKs: VS Code Extension, JetBrains Extension, Web, CLI
- Endpoints:
  - https://api.codeium.com/v1/chat
  - https://api.codeium.com/v1/autocomplete
- Key Features:
  - Cascade agentic flow for complex tasks
  - Ultra-fast tab autocomplete
  - Inline editing with AI suggestions
  - Terminal AI assistance
  - Multi-language support with accuracy tuning
- Code Example (text):
```text
Create a React component that fetches user data from an API, displays it in a table, and includes loading states and error handling.
```

---

## Payment & Fintech (支付金融) — 8 APIs

### [HOT] Stripe Payments API
- URL: https://www.toolkiti.org/api/stripe
- Description: Full payment processing platform: subscriptions, invoices, checkout, and financial reporting. Global payment methods support.
- Pricing: 2.9% + $0.30 per transaction
- Authentication: API Key (Secret Key)
- Popularity: 95/100
- SDKs: Node.js, Python, Go, Java, Ruby, PHP, .NET
- Endpoints:
  - https://api.stripe.com/v1/charges
  - https://api.stripe.com/v1/customers
  - https://api.stripe.com/v1/subscriptions

###  Lemon Squeezy Payments
- URL: https://www.toolkiti.org/api/lemonsqueezy
- Description: All-in-one payments, tax compliance, and digital product sales platform. Sell software, subscriptions, and digital goods globally.
- Pricing: 5% + $0.50 per transaction
- Authentication: API Key
- Popularity: 50/100
- SDKs: Node.js, PHP, Laravel
- Endpoints:
  - https://api.lemonsqueezy.com/v1

### [HOT] Stripe API
- URL: https://www.toolkiti.org/api/stripe
- Description: Online payment processing for internet businesses. Cards, wallets, bank transfers, billing.
- Pricing: 2.9% + $0.30 per transaction
- Authentication: API Key (Secret Key)
- Popularity: 95/100
- SDKs: Python, Node.js, Go, Java, Ruby, PHP, .NET
- Endpoints:
  - https://api.stripe.com/v1/charges
  - https://api.stripe.com/v1/payment_intents

###  Lemon Squeezy API
- URL: https://www.toolkiti.org/api/lemonsqueezy
- Description: All-in-one payments and digital product sales for creators.
- Pricing: 5% + $0.50 per transaction
- Authentication: API Key
- Popularity: 62/100
- SDKs: REST
- Endpoints:
  - https://api.lemonsqueezy.com/v1/products

###  Paddle API
- URL: https://www.toolkiti.org/api/paddle
- Description: Payment infrastructure for SaaS with built-in global tax compliance.
- Pricing: 5% + $0.50 per transaction
- Authentication: API Key
- Popularity: 58/100
- SDKs: Python, Node.js, PHP
- Endpoints:
  - https://api.paddle.com/products

###  Plaid API
- URL: https://www.toolkiti.org/api/plaid
- Description: Connect bank accounts for ACH payments and financial data.
- Pricing: pay-as-you-go
- Authentication: API Key (client_id + secret)
- Popularity: 72/100
- SDKs: Python, Node.js, Go, Java, Ruby
- Endpoints:
  - https://production.plaid.com/transactions/sync

### [HOT] Stripe Webhooks
- URL: https://www.toolkiti.org/api/stripe-webhook
- Description: Real-time payment event notifications. Handle charges, subscriptions, and invoices async.
- Pricing: included with Stripe
- Authentication: Webhook Signing Secret
- Popularity: 94/100
- SDKs: Python, Node.js, Go, Ruby, PHP
- Endpoints:
  - https://your-app.com/api/stripe-webhook

###  Stripe Climate API
- URL: https://www.toolkiti.org/api/stripe-climate
- Description: Embed carbon removal into your checkout. Contribute a fraction of revenue to carbon removal.
- Pricing: 1% of transaction
- Authentication: API Key
- Popularity: 36/100
- SDKs: Python, Node.js, Go
- Endpoints:
  - https://api.stripe.com/v1/climate/orders

---

## Cloud Infrastructure (云基础设施) — 12 APIs

### [POPULAR] Cloudflare Workers API
- URL: https://www.toolkiti.org/api/cloudflare-workers
- Description: Serverless compute at the edge. Deploy JavaScript/TypeScript functions to Cloudflare's global network with zero cold starts.
- Pricing: free tier (100K req/day), paid from $5/mo
- Authentication: API Key, API Token
- Popularity: 78/100
- SDKs: JavaScript, TypeScript, wrangler CLI
- Endpoints:
  - https://api.cloudflare.com/client/v4/accounts

###  Railway Deployment Platform
- URL: https://www.toolkiti.org/api/railway
- Description: Instant deployment platform with built-in databases, secrets, and autoscaling. Deploy from GitHub with zero configuration.
- Pricing: free tier ($5 credit), pay-as-you-go from $5/mo
- Authentication: API Key, CLI Token
- Popularity: 60/100
- SDKs: CLI, Node.js
- Endpoints:
  - https://backboard.railway.app/graphql/v2

###  Fly.io Edge Platform
- URL: https://www.toolkiti.org/api/flyio
- Description: Deploy apps close to users with global edge infrastructure. Run containers in 35+ regions with automatic anycast routing.
- Pricing: free tier (3 VMs), pay-as-you-go from $1.94/mo per VM
- Authentication: API Key, CLI Token
- Popularity: 64/100
- SDKs: CLI (flyctl), Terraform
- Endpoints:
  - https://api.machines.dev

### [POPULAR] Vercel API
- URL: https://www.toolkiti.org/api/vercel
- Description: Deploy frontend apps with instant preview URLs and serverless functions.
- Pricing: free tier + pay-as-you-go
- Authentication: API Key (Bearer Token)
- Popularity: 88/100
- SDKs: REST, CLI
- Endpoints:
  - https://api.vercel.com/v13/deployments

### [POPULAR] Cloudflare API
- URL: https://www.toolkiti.org/api/cloudflare
- Description: CDN, DNS, Workers (serverless), R2 storage, and AI inference.
- Pricing: free tier available
- Authentication: API Key, API Token
- Popularity: 82/100
- SDKs: REST, CLI (wrangler)
- Endpoints:
  - https://api.cloudflare.com/client/v4/zones

### [HOT] Supabase API
- URL: https://www.toolkiti.org/api/supabase
- Description: Open-source Firebase alternative: Postgres, auth, realtime, storage.
- Pricing: free tier + $25/month
- Authentication: API Key (anon/service_role)
- Popularity: 90/100
- SDKs: JavaScript, Flutter, Python, Swift, Kotlin
- Endpoints:
  - https://<project>.supabase.co/rest/v1/
- Key Features:
  - Open-source Firebase alternative
  - PostgreSQL database with REST API
  - Built-in auth & Row Level Security
  - Realtime subscriptions
  - File storage
- Code Example (bash):
```bash
curl "https://your-project.supabase.co/rest/v1/users" \
  -H "apikey: $SUPABASE_ANON_KEY" \
  -H "Authorization: Bearer $SUPABASE_ANON_KEY"
```

###  Upstash API
- URL: https://www.toolkiti.org/api/upstash
- Description: Serverless Redis and Kafka with per-request pricing.
- Pricing: free tier + pay-per-request
- Authentication: API Key (Bearer Token)
- Popularity: 68/100
- SDKs: Redis SDK, @upstash/redis
- Endpoints:
  - https://<endpoint>.upstash.io

###  Railway API
- URL: https://www.toolkiti.org/api/railway
- Description: Instant deployments with built-in databases, volumes, and Cron jobs. No YAML required.
- Pricing: free tier + $5/month
- Authentication: API Key (Project Token)
- Popularity: 64/100
- SDKs: REST, GraphQL, CLI
- Endpoints:
  - https://backboard.railway.app/graphql/v2

###  Convex API
- URL: https://www.toolkiti.org/api/convex
- Description: Real-time backend platform. Reactive database, serverless functions, and file storage.
- Pricing: free tier + $25/month
- Authentication: Deploy Key
- Popularity: 55/100
- SDKs: TypeScript, JavaScript, React, Python
- Endpoints:
  - https://{project}.convex.cloud/api

### [HOT] Google Cloud APIs
- URL: https://www.toolkiti.org/api/google-cloud
- Description: Compute, storage, BigQuery, Cloud Run, and 200+ services. $300 free trial for new users.
- Pricing: free tier + pay-as-you-go
- Authentication: OAuth 2.0, Service Account
- Popularity: 91/100
- SDKs: Python, Node.js, Go, Java, C#, PHP, Ruby
- Endpoints:
  - https://compute.googleapis.com/compute/v1/
  - https://storage.googleapis.com/

### [HOT] AWS APIs
- URL: https://www.toolkiti.org/api/aws
- Description: 200+ services: EC2, S3, Lambda, Bedrock, SageMaker. Largest cloud provider by market share.
- Pricing: free tier + pay-as-you-go
- Authentication: IAM (Access Key + Secret), SigV4
- Popularity: 94/100
- SDKs: Python (boto3), Node.js, Go, Java, .NET, Rust
- Endpoints:
  - https://*.amazonaws.com

### [POPULAR] Azure APIs
- URL: https://www.toolkiti.org/api/azure
- Description: Azure OpenAI Service, Cognitive Services, VMs, and 200+ cloud services with enterprise compliance.
- Pricing: free tier + pay-as-you-go
- Authentication: OAuth 2.0, API Key
- Popularity: 89/100
- SDKs: Python, Node.js, Go, Java, .NET
- Endpoints:
  - https://management.azure.com/

---

## Data & Analytics (数据分析) — 3 APIs

### [POPULAR] PostHog API
- URL: https://www.toolkiti.org/api/posthog
- Description: Open-source product analytics: feature flags, session recording, A/B testing.
- Pricing: free tier + usage-based
- Authentication: API Key
- Popularity: 75/100
- SDKs: JavaScript, Python, Node.js, Go, React Native
- Endpoints:
  - https://app.posthog.com/api/event

###  Tinybird API
- URL: https://www.toolkiti.org/api/tinybird
- Description: Real-time data analytics API with parameterized REST endpoints.
- Pricing: free tier + usage-based
- Authentication: API Key (Bearer Token)
- Popularity: 52/100
- SDKs: REST, Python, JavaScript
- Endpoints:
  - https://api.tinybird.co/v0/events

### [POPULAR] Datadog API
- URL: https://www.toolkiti.org/api/datadog
- Description: Infrastructure monitoring, APM, log management, and security in one platform.
- Pricing: free tier + $15/host/month
- Authentication: API Key + Application Key
- Popularity: 77/100
- SDKs: Python, Go, Java, Ruby, TypeScript
- Endpoints:
  - https://api.datadoghq.com/api/v1/metrics
  - https://api.datadoghq.com/api/v2/logs

---

## Automation (自动化工作流) — 7 APIs

### [POPULAR] Zapier API
- URL: https://www.toolkiti.org/api/zapier
- Description: Connect 7000+ apps with no-code automation and webhooks.
- Pricing: free tier + $19.99/month
- Authentication: OAuth 2.0
- Popularity: 78/100
- SDKs: REST, JavaScript
- Endpoints:
  - https://hooks.zapier.com/hooks/catch/

###  Trigger.dev API
- URL: https://www.toolkiti.org/api/trigger-dev
- Description: Open-source background jobs in TypeScript with retries and observability.
- Pricing: free tier + usage-based
- Authentication: API Key
- Popularity: 48/100
- SDKs: TypeScript, @trigger.dev/sdk
- Endpoints:
  - https://api.trigger.dev/api/v1/jobs

### [POPULAR] Twilio API
- URL: https://www.toolkiti.org/api/twilio
- Description: SMS, voice, video, and email communications API. The standard for programmable telecom.
- Pricing: pay-as-you-go (per message/minute)
- Authentication: API Key (Account SID + Auth Token)
- Popularity: 89/100
- SDKs: Python, Node.js, Go, Java, Ruby, PHP, C#
- Endpoints:
  - https://api.twilio.com/2010-04-01/Accounts/{sid}/Messages

### [POPULAR] SendGrid API
- URL: https://www.toolkiti.org/api/sendgrid
- Description: Transactional and marketing email delivery at scale. 100B+ emails delivered.
- Pricing: free tier (100 emails/day) + paid plans
- Authentication: API Key
- Popularity: 86/100
- SDKs: Python, Node.js, Go, Java, Ruby, PHP, C#
- Endpoints:
  - https://api.sendgrid.com/v3/mail/send

### [POPULAR] Discord API
- URL: https://www.toolkiti.org/api/discord
- Description: Build bots, automate communities, and integrate with Discord servers.
- Pricing: free
- Authentication: Bot Token, OAuth 2.0
- Popularity: 83/100
- SDKs: discord.js, discord.py, Go, Rust
- Endpoints:
  - https://discord.com/api/v10/channels/{id}/messages

###  Typeform API
- URL: https://www.toolkiti.org/api/typeform
- Description: Create beautiful conversational forms and surveys. Webhook integrations for responses.
- Pricing: free tier + $25/month
- Authentication: API Key (Bearer Token)
- Popularity: 56/100
- SDKs: JavaScript, Python, REST
- Endpoints:
  - https://api.typeform.com/forms
  - https://api.typeform.com/forms/{id}/responses

###  n8n API
- URL: https://www.toolkiti.org/api/n8n
- Description: Open-source workflow automation with 400+ integrations. Self-hosted or cloud.
- Pricing: free (self-hosted) + cloud from $20/month
- Authentication: API Key
- Popularity: 59/100
- SDKs: REST, n8n-nodes-base
- Endpoints:
  - https://{instance}.n8n.cloud/api/v1/workflows

---

## Site Information
- Site: ToolKiti - Structured API References for AI Agents
- URL: https://www.toolkiti.org
- Full JSON data: https://www.toolkiti.org/api/data
- API comparison: https://www.toolkiti.org/compare
- Text format: https://www.toolkiti.org/api/ai.txt
- Bilingual: English (primary), Chinese
- Search available: On homepage