{"uid":"cap_XalUpZVViYACfYdN3FpS7","slug":"dns-cname-lookup-for-app-domain-subdomain-via-cloudflare-doh-ef1da214","name":"DNS CNAME Lookup for app.<domain> Subdomain via Cloudflare DoH","description":"CNAME record of app.<domain>: looks up the app host under the domain you give (CNAME via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like app without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/app/cname?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_1-K5jTb7UwNO3Yh-9eahQ","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":"Looks up the CNAME record of the app.<domain> subdomain using Cloudflare DNS over HTTPS and returns existence status, records, and TTL.","exampleAgentPrompt":"Can you check whether app.acmecorp.com has a CNAME record configured — I want to know if the app subdomain exists and what it points to, using Cloudflare DNS?","exampleUseCases":[{"title":"Pre-deployment subdomain existence check","prompt":"Before we push our new service live, can you check if app.startupxyz.com already has a CNAME record set up in DNS? I need to know if something is already pointing there."},{"title":"Vendor domain infrastructure audit","prompt":"I'm vetting a SaaS vendor — can you look up whether app.vendorcorp.io has a CNAME record and what it resolves to? I want to understand their app subdomain setup."},{"title":"Troubleshooting broken app subdomain","prompt":"Our users can't reach app.mycompany.com — can you check if the CNAME record exists for that subdomain and tell me the TTL so I can figure out if it's a DNS propagation issue?"}],"resultDescription":"Returns whether the CNAME record for app.<domain> exists, the CNAME target record data, the TTL value, and the DNS response code from Cloudflare's DoH resolver.","failureModes":["Domain does not exist — NXDOMAIN response with no records","app subdomain has no CNAME record (may have A/AAAA instead) — empty or negative response","Invalid or malformed domain input — error or unexpected response","Cloudflare DoH resolver unreachable — service timeout or error","Rate limiting or payment failure — request rejected"],"whenToPreferThis":"Choose this endpoint when you need a fast, targeted check on whether the app.<domain> subdomain has a CNAME record, without performing a full subdomain enumeration. Ideal when you already know the parent domain and want a quick existence and target check for the canonical 'app' host pattern using Cloudflare's trusted DoH infrastructure.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T18:55:37.513Z","isFirstParty":false,"canonicalSlug":"dns-cname-lookup-for-app-domain-subdomain-via-cloudflare-doh-ef1da214"}