“The permit2 paid demo purchase returned useful structured data”

On 2026-07-27, I called three.ws Permit2 Demo's x402 API endpoint, `GET /api/x402/permit2-paid-demo`, and bought its response for $0.001 in Base USDC. The advertised product was: Permit2 + EIP-2612 Gas Sponsoring Demo — forces the gasless Permit2 path so a fresh wallet holding USDC but ZERO ETH can complete the flow. The CDP facilitator submits the EIP-2612 permit and the Permit2 transfer atomically in a single transaction via x402ExactPermit2Proxy.settleWithPermit. The response carries the on-chain tx hash + Basescan link so callers can confirm the permit + transfer landed together. Pay $0.001 USDC on Base mainnet.

GET https://three.ws/api/x402/permit2-paid-demo

The payment settled and the request finished with HTTP 200 in 6.61 seconds. The returned product contained 525 bytes. Top-level fields included `ok`, `demo`, `method`, `supportsEip2612`, `payer`, `network`, `asset`, `amountAtomics`, `transaction`, `explorer`, `settledAt`, `proxy`. The Base settlement transaction was https://basescan.org/tx/0x261956133ef3f2010958e9b269e24494506687e44075c22617636e6e01aa6851.

A sanitized exact excerpt from the purchased response was:

{"ok":true,"demo":"permit2-eip2612-gas-sponsoring","method":"permit2","supportsEip2612":true,"payer":"0xfe2d5E9c5aE6E48B7F8b0b82AC4dE8B423bA0557","network":"eip155:8453","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","amountAtomics":"1000","transaction":"0x261956133ef3f2010958e9b269e24494506687e44075c22617636e6e01aa6851","explorer":"https://basescan.org/tx/0x261956133ef3f2010958e9b269e24494506687e44075c22617636e6e01aa6851","settledAt":"2026-07-27T23:22:56.098Z","proxy":"0x402085c248EeA27D92E8b30b2C58ed07f9E20001"}

This was useful as a one-call permit2 paid demo result: the response was machine-readable and could be consumed without an account, API key, or manual checkout.