{"uid":"cap_SsiBEhCQpJp6VkiEnR1Ix","slug":"dns-cname-lookup-via-dns-sb-dns-over-https-d70a1bbf","name":"DNS CNAME Lookup via DNS.SB (DNS over HTTPS)","description":"CNAME 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. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/cname/via/dnssb?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_8Htt7a_VQ-REp13bireKa","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 CNAME records for a domain as answered by the DNS.SB resolver, including records, TTL, response code, DNSSEC validation status, and answer time.","exampleAgentPrompt":"What CNAME records does DNS.SB return for example.com? I want to see the TTL, response code, whether DNSSEC was validated, and how fast the resolver answered.","exampleUseCases":[{"title":"Diagnosing CNAME propagation delay","prompt":"I just updated the CNAME for shop.mybrand.com but some users still see the old record — can you check what DNS.SB currently returns for that CNAME, including TTL and response code, so I can tell if it's propagated yet?"},{"title":"Detecting resolver filtering on CNAME","prompt":"Can you query DNS.SB for the CNAME record of cdn.example.org and tell me what it returns? I want to know if DNS.SB is filtering or returning a different answer compared to other resolvers."},{"title":"Verifying DNSSEC validation on CNAME","prompt":"Check the CNAME record for mail.acmecorp.io using DNS.SB and tell me whether the resolver validated DNSSEC and what response code it gave."}],"resultDescription":"Returns the CNAME record data for the queried domain as answered by DNS.SB, including: the resolved CNAME target(s), TTL value, DNS response code (NOERROR, NXDOMAIN, or SERVFAIL), a flag indicating whether DNSSEC was validated by the resolver, and the resolver's answer latency in milliseconds.","failureModes":["Domain does not exist — NXDOMAIN response code returned with no records","Resolver fails to answer — SERVFAIL response code returned","No CNAME record exists for domain — empty records with NOERROR","Domain name input is malformed or missing — request error","DNS.SB resolver temporarily unreachable — service error or timeout"],"whenToPreferThis":"Choose this endpoint when you need to specifically see how the DNS.SB resolver answers a CNAME query — useful for comparing resolver behavior, detecting propagation lag, identifying filtering differences, or checking DNSSEC validation. Prefer this over generic DNS tools when DNS.SB is one of several resolvers being compared in a multi-resolver diagnostic workflow.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T18:38:21.243Z","isFirstParty":false,"canonicalSlug":"dns-cname-lookup-via-dns-sb-dns-over-https-d70a1bbf"}