A2A/ACP/UCP/AP2/x402 discovery cross-check: fetch every well-known surface, extract the claimed endpoint URLs + capabilities, PROBE each claimed endpoint (payment endpoints must answer 402, not 200), and report per-surface claim-vs-runtime mismatches with a signed verdict. $0.01.
| Network | Scheme | Amount | Pay To |
|---|---|---|---|
| Base | exact | $0.01 USDC | 0x8AfB...0Bc6 |