{"uid":"cap_3ersr-aC4R3ihE7dJO0Gk","slug":"dns-mx-via-dnssb-80a1add4","name":"dns-mx-via-dnssb","description":"MX records for a domain as answered by DNS.SB (DNS over HTTPS): the records, TTL, response code (NOERROR/NXDOMAIN/SERVFAIL), whether the resolver validated DNSSEC, and the resolver's answer time. Compare resolvers to spot propagation lag, filtering or split-horizon answers. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/mx/via/dnssb?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_yPPzpi_ZVZ4Fx93DEnDZo","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves MX records for a domain using DNS.SB as the DNS-over-HTTPS resolver, returning records, TTL, response code, DNSSEC validation status, and resolver latency.","exampleAgentPrompt":"Can you look up the MX records for example.com using DNS.SB and tell me the mail servers, their TTL, whether DNSSEC was validated, and how fast DNS.SB responded?","exampleUseCases":[{"title":"Email deliverability troubleshooting","prompt":"Something's wrong with email delivery to acme.com — can you check their MX records via DNS.SB and tell me what mail servers are listed, the TTL, and the response code?"},{"title":"DNS propagation verification","prompt":"I just updated the MX records for mybusiness.com — can you query DNS.SB to see if the new records have propagated and what TTL they're showing?"},{"title":"Resolver comparison for split-horizon detection","prompt":"Can you fetch MX records for contoso.com from DNS.SB so I can compare the response against what other resolvers are returning — I want to see if there's any filtering or split-horizon happening?"}],"resultDescription":"Returns the MX records (hostname and priority) for the queried domain, the record TTL, the DNS response code (NOERROR, NXDOMAIN, or SERVFAIL), whether DNS.SB validated DNSSEC for the response, and the resolver's answer time in milliseconds.","failureModes":["Domain does not exist — returns NXDOMAIN response code with no records","Resolver failure — returns SERVFAIL with no records","Domain has no MX records — returns NOERROR with empty answer set","Invalid domain name input — may return error or SERVFAIL","Payment not processed — request rejected before DNS lookup is performed"],"whenToPreferThis":"Choose this endpoint when you specifically need MX records as seen by the DNS.SB resolver (useful for comparing resolver-specific answers, detecting split-horizon DNS, or checking propagation to this particular resolver). Prefer over generic DNS tools when DNSSEC validation status and resolver latency are important signals alongside the record data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T18:56:08.244Z","isFirstParty":false,"canonicalSlug":"dns-mx-via-dnssb-80a1add4"}