{"slug":"api-zfinia-com-x402-v1-x402-metadata-drift-22e886","title":"Did this paid endpoint change its terms since you last looked?","host":"api.zfinia.com","method":"POST","resource":"https://api.zfinia.com/x402/v1/x402-metadata-drift","category":"market","description":"Did this paid endpoint change its terms since you last looked? Give it a previous challenge as the baseline and it returns every difference: price changes with old and new amounts, offers added or removed, a protocol version change, and a payee_changed flag when a new recipient address appears. Neve","price_listed":0.006,"price_asked":0.006,"state":"answering","state_label":"Answering","checks_7d":1,"answered_7d":1,"latency_ms_median":2260,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"baseline":{"accepts":[{"amount":"50000","asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","network":"eip155:8453","pay_to":"0x25e8245f07d5e4873987293dad666afbe56a9608","scheme":"exact"}],"version":2},"body":{"domain":"stripe.com"},"method":"POST","url":"https://api.zfinia.com/x402/v1/company-evidence-pack"},"bodyType":"json","method":"POST","type":"http"},"output_schema":{"$schema":"https://json-schema.org/draft/2020-12/schema","properties":{"input":{"additionalProperties":false,"properties":{"body":{"additionalProperties":false,"properties":{"baseline":{"description":"A challenge object from an earlier preflight or decode, used as the comparison point.","type":"object"},"body":{"description":"Optional JSON body to send with a POST probe.","type":"object"},"method":{"description":"Method to probe with. Defaults to GET.","enum":["GET","POST"],"type":"string"},"url":{"description":"HTTPS URL of an x402 endpoint on a reviewed origin. Credentials, ports and fragments are refused.","maxLength":2048,"type":"string"}},"required":["url","baseline"],"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":{"additionalProperties":false,"properties":{"baseline_offers":{"type":"integer"},"challenge":{"description":"The decoded payment challenge, or null when the endpoint served none.","type":["object","null"]},"challenge_header_present":{"type":"boolean"},"challenge_source":{"description":"header or body, depending on where the endpoint put the challenge.","type":["string","null"]},"change_count":{"type":"integer"},"changed":{"type":"boolean"},"changes":{"items":{"additionalProperties":true,"properties":{"change":{"enum":["PRICE_CHANGED","OFFER_ADDED","OFFER_REMOVED","PAYEE_CHANGED","VERSION_CHANGED"],"type":"string"},"from":{"type":["string","null"]},"offer":{"type":["object","null"]},"to":{"type":["string","null"]}},"required":["change"],"type":"object"},"type":"array"},"current_offers":{"type":"integer"},"method":{"type":"string"},"observed_at":{"type":"string"},"payee_changed":{"description":"A recipient address appeared that was not in the baseline. The change most worth acting on.","type":"boolean"},"payment_sent":{"const":false,"description":"Always false. This service never pays the endpoint it probes."},"reachable":{"type":"boolean"},"request_id":{"description":"Delivery request identifier; also returned in x-foundry-request-id.","type":"string"},"service_id":{"description":"Canonical service identifier.","type":"string"},"service_version":{"description":"Version of the invoked service.","type":"string"},"status":{"type":"integer"},"url":{"type":"string"}},"required":["request_id","service_id","service_version","url","method","observed_at","status","reachable","payment_sent","challenge","challenge_source","challenge_header_present","changed","change_count","changes","payee_changed","baseline_offers","current_offers"],"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-02","reachable":true,"status":402,"valid_402":true,"asked_usdc":0.006,"price_match":true,"latency_ms":2260,"error":null}],"description_full":"Did this paid endpoint change its terms since you last looked? Give it a previous challenge as the baseline and it returns every difference: price changes with old and new amounts, offers added or removed, a protocol version change, and a payee_changed flag when a new recipient address appears. Never pays the endpoint.","last_updated":"2026-10-02T07:27:14.367Z","schemes":["exact"]}