{"slug":"api-zfinia-com-x402-v1-mta-sts-policy-audit-46e8b0","title":"Audit an MTA-STS policy against the MX hosts it is meant to authorise","host":"api.zfinia.com","method":"POST","resource":"https://api.zfinia.com/x402/v1/mta-sts-policy-audit","category":"code","description":"Audit an MTA-STS policy against the MX hosts it is meant to authorise. Reports an MX host no pattern matches, which under enforce mode refuses every message to that host; testing or none mode, where nothing is enforced; a max_age under a day, where a receiver that cannot fetch the policy stops honou","price_listed":0.16,"price_asked":null,"state":"no_terms","state_label":"Answers HTTP 429 without x402 payment terms","checks_7d":1,"answered_7d":0,"latency_ms_median":null,"reported_calls_30d":1,"reported_payers_30d":1,"networks":["eip155:8453"],"badge":"unverified","paid_checks_7d":0,"paid_ok_7d":0,"example_input":{"body":{"dns_record":"v=STSv1;","domain":"example.test","mx_hosts":["mx1.vendor.test","mx2.vendor.test","backup-mx.other-vendor.test"],"policy":"version: STSv1\nmode: testing\nmx: *.vendor.test\nmax_age: 3600"},"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":{"dns_record":{"maxLength":4096,"type":"string"},"domain":{"maxLength":253,"type":"string"},"mx_hosts":{"items":{"maxLength":253,"type":"string"},"maxItems":200,"minItems":1,"type":"array"},"policy":{"maxLength":4096,"type":"string"}},"required":["domain","policy"],"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":{"type":"object"},"type":{"type":"string"}},"required":["type"],"type":"object"}},"required":["input"],"type":"object"},"history":[{"day":"2026-10-04","reachable":true,"status":429,"valid_402":false,"asked_usdc":null,"price_match":null,"latency_ms":233,"error":null}],"description_full":"Audit an MTA-STS policy against the MX hosts it is meant to authorise. Reports an MX host no pattern matches, which under enforce mode refuses every message to that host; testing or none mode, where nothing is enforced; a max_age under a day, where a receiver that cannot fetch the policy stops honouring it almost immediately; and a DNS record with no id, without which a cached policy is never refreshed.","last_updated":"2026-10-04T08:42:45.729Z","schemes":["exact"]}