{"slug":"quartermaster-surewhynot-app-v1-payment-proof-099540","title":"Verify an x402 settlement on Base OR Solana","host":"quartermaster.surewhynot.app","method":"GET","resource":"https://quartermaster.surewhynot.app/v1/payment-proof","category":"market","description":"Verify an x402 settlement on Base OR Solana: pass a 0x transaction hash or a base58 signature, confirm it succeeded, decode its USDC transfers (event logs on Base, net token-balance deltas on Solana), and optionally assert the receiving wallet and amount.","price_listed":0.003,"price_asked":null,"state":"effects","state_label":"Not tested: has real-world effects","checks_7d":0,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453","solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"method":"GET","queryParams":{"amount":"0.001","hash":"0x06be01596be1cb68d9b12a33946d2228a82eeb31016ab237825cec547017095f","payTo":"0xc2a3...4083"},"type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"method":{"enum":["GET"],"type":"string"},"queryParams":{"properties":{"amount":{"description":"Optional: assert the USDC amount (human decimal)","type":"string"},"hash":{"description":"Base transaction hash to verify","pattern":"^0x[0-9a-fA-F]{64}$","type":"string"},"payTo":{"description":"Optional: assert USDC was received by this wallet","type":"string"}},"required":["hash"],"type":"object"},"type":{"const":"http","type":"string"}},"required":["type","method"],"type":"object"},"output":{"properties":{"example":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Verify an x402 settlement on Base OR Solana: pass a 0x transaction hash or a base58 signature, confirm it succeeded, decode its USDC transfers (event logs on Base, net token-balance deltas on Solana), and optionally assert the receiving wallet and amount.","last_updated":"2026-09-18T03:41:57.366Z","schemes":["exact"]}