{"uid":"cap_O9p_mEVjLQLMwZUja7ems","slug":"dns-txt-app-subdomain-7d200845","name":"dns-txt-app-subdomain","description":"TXT record of app.<domain>: looks up the app host under the domain you give (TXT via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like app without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/app/txt?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_pwpubZZA-xNWBQNCghNTY","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 TXT DNS record for the 'app' subdomain of a given domain using Cloudflare DoH and reports existence, records, and TTL.","exampleAgentPrompt":"Can you check if there's a TXT record set on the app subdomain of example.com — I want to know if it exists and what its value and TTL are?","exampleUseCases":[{"title":"Verify app subdomain TXT record","prompt":"Check whether app.stripe.com has any TXT DNS records configured and tell me what they say and their TTL."},{"title":"Pre-deployment DNS sanity check","prompt":"Before we go live, confirm that app.mycompany.com has a TXT record set — I need to know if it exists and what value it holds."},{"title":"Third-party service ownership verification","prompt":"I'm trying to confirm ownership of app.acmecorp.io via a TXT record — can you look it up via Cloudflare and tell me if the record is there and what it contains?"}],"resultDescription":"Returns whether the TXT record for app.<domain> exists, the record values (if present), and the TTL as resolved by Cloudflare DNS over HTTPS. Indicates non-existence if no record is found.","failureModes":["Domain not found or invalid domain name provided — returns non-existence or DNS error","Cloudflare DoH upstream timeout or outage — lookup may fail or return stale data","app subdomain has no TXT record — returns empty record set with existence=false","Malformed domain input may result in an error response"],"whenToPreferThis":"Use this endpoint when you specifically need to check TXT records for the 'app' subdomain of a domain quickly without enumerating all subdomains. Prefer this over generic DNS lookup tools when you know you want the 'app' host and TXT record type specifically, and want Cloudflare DoH resolution with TTL info included.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T18:56:06.097Z","isFirstParty":false,"canonicalSlug":"dns-txt-app-subdomain-7d200845"}