AgentAPI
A curated directory of APIs designed for AI agents. Machine-readable. MCP-compatible. Agent-accessible.
Website: https://agentapihub.com
Docs: https://api.agentapihub.com/api/docs
Free Features
The directory and search functionality is completely free:
# Browse all APIs (FREE)
curl https://agentapihub.com/api/v1/apis
# Search by capability (FREE)
curl "https://agentapihub.com/api/v1/apis?q=send+email&mcp=true"
# Filter by category (FREE)
curl "https://agentapihub.com/api/v1/apis?category=ai"
x402 Pay-Per-Use APIs
Some APIs are available through x402 — a pay-per-use protocol using USDC on Base chain.
Available x402 APIs
| API |
Endpoint |
Approx. Price |
| Gemini Chat |
/api/gemini/chat/completions |
~$0.001/req |
| Gemini Embeddings |
/api/gemini/embeddings |
~$0.0005/req |
How x402 Works
- Call the API endpoint
- Receive
402 Payment Required with price details
- Send USDC payment on Base chain
- Retry request with payment proof
- Receive API response
⚠️ Important Safety Notice
x402 payments require explicit setup and should not be automated without safeguards:
- Wallet required: You must configure a wallet with USDC on Base
- User approval recommended: Implement confirmation flows before any payment
- Verify recipient: The payment recipient is
0xcCb92A101347406ed140b18C4Ed27276844CD9D7 (gizmolab.eth)
- Set spending limits: Configure maximum per-request and daily limits
- This skill does not auto-execute payments — it provides documentation only
For implementation details, see: https://api.agentapihub.com/api/docs
Directory Categories
| Category |
APIs |
Example |
| Search |
Brave, Serper, Exa, Tavily, Perplexity |
Web search with AI summaries |
| AI & ML |
OpenAI, Claude, Gemini, Groq, Replicate |
LLM inference, image gen |
| Communication |
Resend, Twilio, Slack, Discord, Telegram |
Email, SMS, messaging |
| Database |
Supabase, Pinecone, Qdrant, Neon, Upstash |
SQL, vectors, KV store |
| Payments |
Stripe, Lemon Squeezy, PayPal |
Payment processing |
| Scraping |
Firecrawl, Browserbase, Apify |
Web scraping, automation |
| Developer |
GitHub, Vercel, Linear, Sentry |
Code, deploy, issues |
| Productivity |
Notion, Google Calendar, Todoist |
Tasks, scheduling |
MCP-Compatible APIs
All 50+ APIs in the directory are MCP-compatible. Filter with ?mcp=true.
API Response Format
{
"id": "resend",
"name": "Resend",
"description": "Modern email API for developers",
"category": "communication",
"provider": "Resend",
"docs": "https://resend.com/docs",
"auth": "api_key",
"pricing": "freemium",
"pricingDetails": "3,000 free/mo, then $20/mo",
"rateLimit": "10 req/sec",
"mcpCompatible": true,
"x402Enabled": false,
"tags": ["email", "transactional", "notifications"]
}
Top APIs by Category
Search
- Brave Search - Privacy-focused, 2k free/mo
- Exa - Neural/semantic search for AI
- Tavily - Built specifically for AI agents
AI & ML
- OpenAI - GPT-4, DALL-E, Whisper
- Anthropic Claude - Best for reasoning/coding
- Groq - Fastest inference (500+ tok/sec)
Communication
- Resend - Simple email API, 3k free/mo
- Twilio - SMS/voice, industry standard
- Slack/Discord/Telegram - Team messaging
Database
- Supabase - Postgres + auth + storage
- Pinecone/Qdrant - Vector DBs for RAG
- Upstash - Serverless Redis
Usage Examples
# Find an API for sending emails
Search AgentAPI for "email" → Returns Resend, SendGrid, Twilio
# Find vector databases for RAG
Search AgentAPI for "vector embeddings" → Returns Pinecone, Qdrant, Weaviate
# Find fast LLM inference
Search AgentAPI for category "ai" + filter by latency → Returns Groq, Gemini Flash
Contributing
Submit new APIs at https://agentapihub.com (Submit API link in footer).
Built By
GizmoLab (@gizmolab_) — gizmolab.io
1---2name: agentapi3description: Browse and search the AgentAPI directory - a curated database of APIs designed for AI agents. Find MCP-compatible APIs for search, AI, communication, databases, payments, and more. Includes free directory access and optional x402 pay-per-use APIs.4---5
6# AgentAPI
7
8A curated directory of APIs designed for AI agents. Machine-readable. MCP-compatible. Agent-accessible.
9
10**Website:** https://agentapihub.com
11**Docs:** https://api.agentapihub.com/api/docs
12
13## Free Features
14
15The directory and search functionality is **completely free**:
16
17```bash
18# Browse all APIs (FREE)
19curl https://agentapihub.com/api/v1/apis
20
21# Search by capability (FREE)
22curl "https://agentapihub.com/api/v1/apis?q=send+email&mcp=true"
23
24# Filter by category (FREE)
25curl "https://agentapihub.com/api/v1/apis?category=ai"
26```
27
28## x402 Pay-Per-Use APIs
29
30Some APIs are available through **x402** — a pay-per-use protocol using USDC on Base chain.
31
32### Available x402 APIs
33
34| API | Endpoint | Approx. Price |
35|-----|----------|---------------|
36| Gemini Chat | `/api/gemini/chat/completions` | ~$0.001/req |
37| Gemini Embeddings | `/api/gemini/embeddings` | ~$0.0005/req |
38
39### How x402 Works
40
411. Call the API endpoint
422. Receive `402 Payment Required` with price details
433. Send USDC payment on Base chain
444. Retry request with payment proof
455. Receive API response
46
47### ⚠️ Important Safety Notice
48
49**x402 payments require explicit setup and should not be automated without safeguards:**
50
51- **Wallet required:** You must configure a wallet with USDC on Base
52- **User approval recommended:** Implement confirmation flows before any payment
53- **Verify recipient:** The payment recipient is `0xcCb92A101347406ed140b18C4Ed27276844CD9D7` (gizmolab.eth)
54- **Set spending limits:** Configure maximum per-request and daily limits
55- **This skill does not auto-execute payments** — it provides documentation only
56
57For implementation details, see: https://api.agentapihub.com/api/docs
58
59## Directory Categories
60
61| Category | APIs | Example |
62|----------|------|---------|
63| Search | Brave, Serper, Exa, Tavily, Perplexity | Web search with AI summaries |
64| AI & ML | OpenAI, Claude, Gemini, Groq, Replicate | LLM inference, image gen |
65| Communication | Resend, Twilio, Slack, Discord, Telegram | Email, SMS, messaging |
66| Database | Supabase, Pinecone, Qdrant, Neon, Upstash | SQL, vectors, KV store |
67| Payments | Stripe, Lemon Squeezy, PayPal | Payment processing |
68| Scraping | Firecrawl, Browserbase, Apify | Web scraping, automation |
69| Developer | GitHub, Vercel, Linear, Sentry | Code, deploy, issues |
70| Productivity | Notion, Google Calendar, Todoist | Tasks, scheduling |
71
72### MCP-Compatible APIs
73
74All 50+ APIs in the directory are MCP-compatible. Filter with `?mcp=true`.
75
76## API Response Format
77
78```json
79{
80 "id": "resend",
81 "name": "Resend",
82 "description": "Modern email API for developers",
83 "category": "communication",
84 "provider": "Resend",
85 "docs": "https://resend.com/docs",
86 "auth": "api_key",
87 "pricing": "freemium",
88 "pricingDetails": "3,000 free/mo, then $20/mo",
89 "rateLimit": "10 req/sec",
90 "mcpCompatible": true,
91 "x402Enabled": false,
92 "tags": ["email", "transactional", "notifications"]
93}
94```
95
96## Top APIs by Category
97
98### Search
99- **Brave Search** - Privacy-focused, 2k free/mo
100- **Exa** - Neural/semantic search for AI
101- **Tavily** - Built specifically for AI agents
102
103### AI & ML
104- **OpenAI** - GPT-4, DALL-E, Whisper
105- **Anthropic Claude** - Best for reasoning/coding
106- **Groq** - Fastest inference (500+ tok/sec)
107
108### Communication
109- **Resend** - Simple email API, 3k free/mo
110- **Twilio** - SMS/voice, industry standard
111- **Slack/Discord/Telegram** - Team messaging
112
113### Database
114- **Supabase** - Postgres + auth + storage
115- **Pinecone/Qdrant** - Vector DBs for RAG
116- **Upstash** - Serverless Redis
117
118## Usage Examples
119
120```markdown
121# Find an API for sending emails
122Search AgentAPI for "email" → Returns Resend, SendGrid, Twilio
123
124# Find vector databases for RAG
125Search AgentAPI for "vector embeddings" → Returns Pinecone, Qdrant, Weaviate
126
127# Find fast LLM inference
128Search AgentAPI for category "ai" + filter by latency → Returns Groq, Gemini Flash
129```
130
131## Contributing
132
133Submit new APIs at https://agentapihub.com (Submit API link in footer).
134
135## Built By
136
137GizmoLab ([@gizmolab_](https://twitter.com/gizmolab_)) — [gizmolab.io](https://gizmolab.io)
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