{"slug":"aimarket-7480e6df","name":"AIMarket","summary":"Debug an x402 payment before you submit it — why does USDC answer invalid signature? Verifies the EIP-3009 transferWithAuthorization (EIP-712 signer, v, low s, validity window) and the seller's terms (payTo, amount, asset, network, bound nonce), and names the domain a failing signature was really made for, e.g. Base Sepolia's 'USDC' used for Base mainnet's 'USD Coin', the commonest reason an x402 payment reverts. Offline, deterministic, signed answer.","status":"live","indexable":true,"listed_since":"2026-10-25T17:51:21.370923Z","sources":[{"source":"x402_bazaar","external_id":"https://modelmarket.dev/x402/x402-check","owner_address":"0x1218ff36c5d2e3b6a565cdb1a8b1accfc606ad0a","seen_at":"2026-10-26T05:59:53.744746Z","removed_at":null}],"endpoints":[{"url":"https://modelmarket.dev/x402/x402-check","host":"modelmarket.dev","protocol":"x402","state":"live","last_probe_at":"2026-10-26T06:23:34.318661Z","last_ok_at":"2026-10-26T06:23:34.318661Z","tools_count":null,"tools_changed_at":null,"uptime_24h":1.0,"uptime_30d":1.0}],"also_listed_as":[{"slug":"modelmarket-dev-64a430f0","name":"modelmarket.dev"}],"payment_options":[{"endpoint_url":"https://modelmarket.dev/x402/x402-check","network":"eip155:8453","scheme":"exact","rail":"exact","asset":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","coin":"USDC","asset_label":"USD Coin","amount":"3000","pay_to":"0x1218ff36c5d2e3b6a565cdb1a8b1accfc606ad0a","observed_at":"2026-10-26T06:23:34.318661Z"}],"usage":{"source":"x402_bazaar","unique_payers_30d":3,"paid_calls_30d":4,"last_paid_at":"2026-10-24T21:33:51.740Z","reported_at":"2026-10-26T05:59:53.744746Z"},"notice":"Not affiliated with addrbook — claim or request removal."}