{"uid":"cap_4GpClVigqUwvjXZHfdPDP","slug":"dns-a-login-subdomain-c319663d","name":"dns-a-login-subdomain","description":"A record of login.<domain>: looks up the login host under the domain you give (A via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like login without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/login/a?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_wCEGHpN-d2a2ldPKaB_DT","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 A record for the login.<domain> subdomain via Cloudflare DNS-over-HTTPS and reports whether it exists, its IP records, and TTL.","exampleAgentPrompt":"Can you check if the login subdomain exists for example.com — look up the A record for login.example.com and tell me the IP and TTL?","exampleUseCases":[{"title":"Verify login portal is live","prompt":"Check if login.acme.com is live — look up its A record and tell me if it resolves to an IP and what the TTL is."},{"title":"Detect phishing infrastructure","prompt":"I need to know if login.suspiciousdomain.xyz exists and what IP it resolves to — can you do a DNS A record lookup for the login subdomain?"},{"title":"SaaS vendor reconnaissance","prompt":"Does Salesforce have a login subdomain? Look up the A record for login.salesforce.com and give me the IP addresses and TTL."}],"resultDescription":"Returns whether the login.<domain> A record exists, the resolved IPv4 addresses, TTL value, and DNS response code (e.g. NOERROR or NXDOMAIN). Provides a quick existence check without full subdomain enumeration.","failureModes":["NXDOMAIN if login subdomain does not exist for the given domain","Invalid or malformed domain input returns an error","Network or upstream Cloudflare DoH unavailability causes lookup failure","Rate limiting or payment failure (x402) prevents the lookup from completing"],"whenToPreferThis":"Use this endpoint when you need a fast, cheap single-host existence check specifically for the login subdomain of a domain, using Cloudflare DoH for reliable resolution. Prefer it over full subdomain enumeration tools when you only need to confirm whether a login host is present and what IP it resolves to.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:08.449Z","isFirstParty":false,"canonicalSlug":"dns-a-login-subdomain-c319663d"}