{"slug":"anywaypossible-com-api-payment-guard-86f7f7","title":"Verify an x402 purchase before an AI agent signs","host":"anywaypossible.com","method":"POST","resource":"https://anywaypossible.com/api/payment-guard","category":"market","description":"Verify an x402 purchase before an AI agent signs. Validate the live HTTP 402 challenge, Base network, USDC asset, quoted price, recipient, price ceiling, buyer funding, optional gas reserve, and destination hazards, then receive a machine-readable safe-to-sign, fund, review, or reject decision. No a","price_listed":0.01,"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":3,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"expectedPayTo":"0x2222222222222222222222222222222222222222","maxAmountUsdc":"0.10","minGasReserveEth":"0","payerAddress":"0x1111111111111111111111111111111111111111","serviceUrl":"https://example.com/api/report"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"expectedPayTo":{"pattern":"^0x[a-fA-F0-9]{40}$","type":"string"},"maxAmountUsdc":{"pattern":"^[0-9]+(\\.[0-9]{1,6})?$","type":"string"},"minGasReserveEth":{"pattern":"^[0-9]+(\\.[0-9]{1,18})?$","type":"string"},"payerAddress":{"pattern":"^0x[a-fA-F0-9]{40}$","type":"string"},"serviceUrl":{"format":"uri","type":"string"}},"required":["payerAddress","serviceUrl","maxAmountUsdc"],"type":"object"},"bodyType":{"enum":["json","form-data","text"],"type":"string"},"method":{"enum":["POST"],"type":"string"},"type":{"const":"http","type":"string"}},"required":["type","method","bodyType","body"],"type":"object"},"output":{"properties":{"example":{"properties":{"alerts":{"items":{"type":"string"},"type":"array"},"asset":{"type":"string"},"checks":{"items":{"type":"object"},"type":"array"},"decision":{"type":"string"},"network":{"type":"string"},"quotedAmountUsdc":{"type":"string"},"quotedPayTo":{"type":"string"},"recommendedAction":{"type":"string"},"riskLevel":{"type":"string"},"safeToSign":{"type":"boolean"}},"required":["decision","safeToSign","riskLevel","quotedAmountUsdc","quotedPayTo","network","asset","checks","alerts","recommendedAction"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[],"description_full":"Verify an x402 purchase before an AI agent signs. Validate the live HTTP 402 challenge, Base network, USDC asset, quoted price, recipient, price ceiling, buyer funding, optional gas reserve, and destination hazards, then receive a machine-readable safe-to-sign, fund, review, or reject decision. No account or API key.","last_updated":"2026-09-04T18:13:57.34Z","schemes":["exact"]}