{"uid":"cap_UW0gpb7eGf_2M__DG17aj","slug":"dns-txt-login-subdomain-5dfe4535","name":"dns-txt-login-subdomain","description":"TXT record of login.<domain>: looks up the login 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 login without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/login/txt?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_vFnXslKT5h_Vyy1p5eDjr","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 login.<domain> subdomain via Cloudflare DoH and reports its existence, record values, and TTL.","exampleAgentPrompt":"Can you check if example.com has a TXT record set up at its login subdomain — I want to know if login.example.com exists in DNS and what the record says?","exampleUseCases":[{"title":"Verify login subdomain before SSO setup","prompt":"Before we configure single sign-on, can you check if login.acmecorp.com has any TXT records in DNS and tell me what TTL they have?"},{"title":"Security audit of competitor login infrastructure","prompt":"I'm doing a quick recon on rival.io — does it have a login subdomain with TXT records, and if so what do those records say?"},{"title":"Diagnose missing login host for client domain","prompt":"My client's domain clientsite.net seems to be missing its login host — can you check whether login.clientsite.net has any TXT DNS records configured right now?"}],"resultDescription":"Returns whether the login.<domain> subdomain exists in DNS, the full TXT record values found at that host, and the TTL of those records, as resolved via Cloudflare DNS over HTTPS.","failureModes":["Domain does not exist — returns not-found or NXDOMAIN result","No TXT record at login subdomain — exists flag false, empty records","Invalid or malformed domain input — request may fail or return error","Cloudflare DoH upstream timeout — transient resolution failure","Rate limiting or payment failure — 402 payment required if credits exhausted"],"whenToPreferThis":"Use this endpoint when you need a quick, targeted existence check for the login subdomain of a specific domain without enumerating all subdomains. Prefer it over full DNS enumeration tools when you only care about TXT records at the login host, and when using DoH (Cloudflare) resolution is acceptable. It is cost-effective at $0.01 per lookup for spot checks in security audits, infrastructure validation, or pre-deployment checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:45.918Z","isFirstParty":false,"canonicalSlug":"dns-txt-login-subdomain-5dfe4535"}