AiPayGen

Pay-per-use Claude AI API for autonomous agents. 140+ endpoints, USDC micropayments on Base via x402, no API keys or signups required.

How it works

1. Agent calls any endpoint (e.g. POST /research)
2. First 10 calls/day are free — no payment needed
3. After that, the server returns HTTP 402 with payment instructions
4. Agent signs a USDC transaction on Base and retries with an X-Payment header
5. Server verifies payment via CDP x402 and returns the result

Agent ──POST /research──▶ AiPayGen ──402 + payment info──▶ Agent
Agent ──POST /research + X-Payment──▶ AiPayGen ──200 + result──▶ Agent

Quick start

Try free (no setup)

curl -X POST https://api.aipaygen.com/preview \
  -H "Content-Type: application/json" \
  -d '{"query": "What is x402?"}'

Python

pip install aipaygen-langchain

from aipaygen_langchain import AiPayGenToolkit

tools = AiPayGenToolkit(x402_token="your_token").get_tools()
# Use with LangChain agents, CrewAI, etc.

JavaScript / TypeScript

npm install aipaygen

import { AiPayGen } from "aipaygen";
const client = new AiPayGen({ token: "your_token" });
const result = await client.research("quantum computing trends");

MCP Server (Claude Desktop, Cursor, etc.)

Connect as a remote MCP server — no local install:

https://mcp.aipaygen.com/mcp

Or run locally:

pip install aipaygen-mcp
aipaygen-mcp

Claude Desktop config:

{
  "mcpServers": {
    "aipaygen": {
      "command": "aipaygen-mcp"
    }
  }
}

Endpoints

AI / NLP

Web Intelligence

Agent Memory

Discovery

Full list: api.aipaygen.com/discover

Architecture

• Runtime: Flask + Gunicorn on Raspberry Pi 5
• AI: Claude Haiku 4.5 via Anthropic API
• Payments: x402 protocol, USDC on Base Mainnet, verified via CDP
• Tunnel: Cloudflare Tunnel → api.aipaygen.com
• Storage: SQLite (memory, usage tracking, API keys)
• Discovery: OpenAPI, LLMs.txt, MCP, agents.json, ai-plugin.json

Links

License

MIT