---
name: agentapi-6fe1e846fbe0
description: 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 x402 pay-per-use billing with USDC on Base.
author: gizmolab
version: 1.0.3
tags: [api, mcp, agents, directory, search, integrations, x402, crypto, payments]
---

# AgentAPI

A curated directory of APIs designed for AI agents. Machine-readable. MCP-compatible. Agent-accessible.

**Website:** https://agentapihub.com  
**Billing API:** https://api.agentapihub.com  
**Docs:** https://api.agentapihub.com/api/docs

## x402 Pay-Per-Use Billing

AgentAPI supports **x402** — a payment protocol that lets AI agents pay for API calls with USDC on Base. No API keys required.

### How It Works

1. Agent calls API endpoint (e.g., `/api/gemini/chat/completions`)
2. Server returns `402 Payment Required` with price + wallet address
3. Agent sends USDC payment on Base chain
4. Agent retries with payment proof in header
5. Server verifies payment, proxies request, returns response

### Example Flow

```bash
# 1. Initial request returns 402
curl https://api.agentapihub.com/api/gemini/chat/completions \
  -H "Content-Type: application/json" \
  -d '{"model":"gemini-2.0-flash","messages":[{"role":"user","content":"Hello"}]}'

# Response: 402 Payment Required
# {
#   "price": "0.001",
#   "currency": "USDC",
#   "chain": "base",
#   "recipient": "0xcCb92A101347406ed140b18C4Ed27276844CD9D7",
#   "paymentId": "pay_abc123"
# }

# 2. Agent pays on Base, retries with proof
curl https://api.agentapihub.com/api/gemini/chat/completions \
  -H "Content-Type: application/json" \
  -H "X-Payment-Proof: 0x..." \
  -d '{"model":"gemini-2.0-flash","messages":[{"role":"user","content":"Hello"}]}'
```

### Available x402 APIs

| API | Endpoint | Price |
|-----|----------|-------|
| Gemini Chat | `/api/gemini/chat/completions` | ~$0.001/req |
| Gemini Embeddings | `/api/gemini/embeddings` | ~$0.0005/req |

### Why x402?

- **No API keys** — Agents self-provision access
- **Pay-per-use** — No subscriptions, no minimums
- **Crypto-native** — USDC on Base (fast, cheap txns)
- **Agent-friendly** — Programmatic payments without human bottleneck

## Quick Search

### By Category

| 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 Access

### JSON Endpoint

```bash
# Fetch all APIs
curl https://agentapihub.com/api/v1/apis

# Search by capability
curl "https://agentapihub.com/api/v1/apis?q=send+email&mcp=true"

# Filter by category
curl "https://agentapihub.com/api/v1/apis?category=ai"
```

### Response Format

```json
{
  "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,
  "examplePrompt": "Send an email notification using Resend",
  "latency": "fast",
  "reliability": 99.9,
  "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

```markdown
# 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_](https://twitter.com/gizmolab_)) — [gizmolab.io](https://gizmolab.io)


---
Source attribution: modbender
Original project: https://github.com/modbender/skill-library-mcp/blob/d9c8fe903b5b4e82237dbe8d0df8567783022e18/data/agentapi-hub/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Dave AI.

## Upstream license notice

MIT License

Copyright (c) 2025 skill-library-mcp contributors

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Dave AI resource metadata

Creator / publisher: modbender
Original project: https://github.com/modbender/skill-library-mcp/blob/d9c8fe903b5b4e82237dbe8d0df8567783022e18/data/agentapi-hub/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering, Marketing, Product Management
Roles: Backend Developer, Data Engineer, Growth Marketer, ML / AI Engineer, Product Manager
Specialties: API
Tools: Base, Usdc
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 227218995bccd1d55617b35b85c27f78bd4c13284785a18a67c00c304b19d930