{"slug":"overwing-ai-api-x402-preflight-x402-d13d4d","title":"Overwing Preflight for x402","host":"overwing.ai","method":"POST","resource":"https://overwing.ai/api/x402/preflight/x402","category":"market","description":"Overwing Preflight for x402: should an agent sign this payment? POST the PAYMENT-REQUIRED terms and your policy; get allow, review or refuse with reasons: terms vs policy, payee vs the x402 directory and the server's own manifest, price vs the record. $0.002 USDC, no account.","price_listed":0.002,"price_asked":0.002,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":1798,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"payment_required":"<the PAYMENT-REQUIRED header value, or its decoded JSON>","policy":{"allow_testnets":false,"max_per_call_usd":0.05,"new_payee_max_usd":0.01},"requested_url":"https://example.com/api/thing"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"properties":{"fresh_quote":{"description":"Also fetch the resource unpaid and compare its quote with the terms given","type":"boolean"},"network":{"description":"The CAIP-2 network the agent would pay on, when the terms offer several","type":"string"},"payment_required":{"description":"The PAYMENT-REQUIRED header value (base64 JSON) or the decoded x402 v2 object {x402Version, resource, accepts[]}"},"policy":{"description":"max_per_call_usd (default 0.05), new_payee_max_usd (0.01), allowed_networks, allowed_payees, blocked_payees, allow_testnets (false), max_price_drift (0.25)","type":"object"},"requested_url":{"description":"The URL the agent asked for; checked against the resource in the terms","type":"string"}},"required":["payment_required"],"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":{"checked_at":{"type":"string"},"decision":{"enum":["allow","review","refuse"],"type":"string"},"payee":{"type":"object"},"policy":{"type":"object"},"price":{"type":"object"},"reasons":{"type":"array"},"terms":{"type":"object"},"valid_for_seconds":{"type":"integer"}},"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-18","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.002,"price_match":true,"latency_ms":1798,"error":null}],"description_full":"Overwing Preflight for x402: should an agent sign this payment? POST the PAYMENT-REQUIRED terms and your policy; get allow, review or refuse with reasons: terms vs policy, payee vs the x402 directory and the server's own manifest, price vs the record. $0.002 USDC, no account.","last_updated":"2026-10-13T23:38:15.824Z","schemes":["exact"]}