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

说明与用途

开发者构建了一个使用 Llama‑3‑8B 的自治 FastAPI 服务，通过 Base 上的 x402 进行支付验证，每次请求赚取 USDC。

问题

Developers want to monetize a stateless language‑model API while keeping compute costs below revenue and avoiding high gas fees.

结果

The system earns ~$0.01 per API call with a gross margin of ~$0.0088 after compute costs, using a $5/month GPU and edge‑based payment verification.

工作流

• 1. Deploy Cloudflare Worker as API Gateway to validate x402 payment receipts.
• 2. Host FastAPI agent worker on a cheap GPU instance (e.g., AWS g4dn.xlarge spot).
• 3. Load quantized Llama‑3‑8B (4‑bit) model at startup using llama‑cpp‑python.
• 4. Expose /generate endpoint that accepts prompt, max_tokens, temperature.
• 5. Client sends request with Authorization: x402 <signed_receipt> header.
• 6. Worker verifies receipt against USDC contract on Base via read‑only call.
• 7. If valid, forward request to agent worker; otherwise respond 402 Payment‑Required.
• 8. Agent worker runs inference, returns JSON response.
• 9. Client receives result and receipt is settled on‑chain instantly.

证据

I went with Llama‑3‑8B quantized to 4‑bit running on a $5/month GPU instance

来源

The gateway checks the signed receipt against the USDC contract on Base

来源