x402-paid-agent-starter / proof

On-chain proof (Base Sepolia, x402 v1 exact)

Each starter answered one real paid call through the public x402.org facilitator. The payment is an EIP-3009 transferWithAuthorization of 0.01 test USDC, which the facilitator settled before the app did the work.

Starter	Settlement transaction	Block	Time (UTC)
TypeScript (`typescript/src/server.ts`, payer `npm run pay`)	https://sepolia.basescan.org/tx/0x352aa808ef460fdaf8de6a9ba8a0e5bac7f2cf7b26c426f6b9440cd0de13cacf	48472205	2026-10-21 20:58:30
Python (`python/app.py` with uvicorn, payer `python pay.py`)	https://sepolia.basescan.org/tx/0xef8fb6cd9f8f6c4d8e0552d21bd7863743392371b13f64efa7762f6dbe93c648	48472260	2026-10-21 20:58:41

Payer: 0x3c1A1E01e790Cd326495631B3b38Bd7068F08d6F. Payee (PAY_TO): 0x9B29122f4e77Deb78bBb2580EDb07C08ff22DbA7, a test-only address.
Both receipts have status 1, and each logs a single USDC Transfer of 10000 atomic units from the payer to the payee. Checked with eth_getTransactionReceipt on https://sepolia.base.org.
Acceptance test A5 (typescript/test/starter.test.ts, mirrored in python/tests/test_starter.py) checks that each README holds its transaction link.

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