# x402 Mainnet Paid Flow Proof

Status: verified

Summary:
A small AI/agent-compatible paid API completed a real x402 mainnet paid flow on Base using USDC. This is a machine-payment style API flow proof, not a claim that a fully autonomous AI independently chose to buy.

Flow:

```txt
402 Payment Required -> x402 payment retry -> Base USDC settlement -> 200 paid response
```

Proof:

- Route tested: POST /fix-error
- Network: eip155:8453
- Chain: Base
- Asset: USDC
- Amount: 0.01 USDC
- Amount units: 10000
- Settlement stage: settled
- Receiver matched expected service wallet: true
- Proof tx: 0x9c51a524ca4c60b8bfbf119c8b6a058571c37c5af79178cfffe6b752b1ac32c5
- Explorer: https://basescan.org/tx/0x9c51a524ca4c60b8bfbf119c8b6a058571c37c5af79178cfffe6b752b1ac32c5

Cautious interpretation:

This proves the service can complete a real x402 mainnet paid API flow. It does not claim that OpenAI, Anthropic, Google, or any specific company paid. It does not claim a pure autonomous AI independently chose to buy. It does not claim recurring external revenue yet.

Next observation targets:

- external wallet payment
- repeated paid flows
- /nano-check or /agent-visibility-report conversion