How I Built an Autonomous AI Agent That Earns USDC While I Sleep

说明与用途

构建了一个自主 AI 代理，使用 x402 接收 USDC 微支付，通过 FastAPI 和 Redis 处理请求，执行 AI 逻辑，并水平扩展。

问题

Developers want to create a self‑serving AI agent that can accept micro‑payments for its work, offset hosting costs, and learn on‑chain payment economics.

结果

The agent processes requests in ~120 ms, charges callers directly in USDC, and can be scaled by adding worker instances.

工作流

• 1. Deploy FastAPI front‑end that validates X‑Payment header and enqueues job in Redis.
• 2. Run async worker pool that pulls jobs from Redis, executes AI logic (e.g., sentiment analysis), and stores result in Redis.
• 3. Verify x402 payment header using web3.py against USDC contract on Base and ensure amount matches price.
• 4. Return result to caller via HTTP after job completion.
• 5. Scale workers horizontally by adding more instances sharing the same Redis queue.

证据

The x402 spec defines a payment header: X-Payment: <token_address>:<chain_id>:<amount>:<receiver>:<nonce>:<signature>

来源

We verify the signature against the token contract (USDC on Base) and ensure the amount matches our price.

来源