{"uid":"cap_834X_N7jftQZM4zHYyyzB","slug":"dns-a-record-lookup-for-portal-subdomain-dc4bce3a","name":"DNS A Record Lookup for portal Subdomain","description":"A record of portal.<domain>: looks up the portal 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 portal without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/portal/a?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_NnriTHoy1cjIc1kB53YW_","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 (IPv4) record for the portal.<domain> subdomain via Cloudflare DNS over HTTPS and reports existence, records, and TTL.","exampleAgentPrompt":"Can you check if portal.acme.com has a valid DNS A record — I want to know its IP address and TTL?","exampleUseCases":[{"title":"Verify portal subdomain before onboarding","prompt":"Before we send users to the customer portal, can you check whether portal.bigcorp.com actually resolves to an IP address and what TTL it has?"},{"title":"Monitor competitor portal host existence","prompt":"I want to know if portal.rivalcompany.com has a live DNS A record right now — look it up and tell me if it exists and what IP it points to."},{"title":"Pre-deployment DNS sanity check","prompt":"We just updated DNS — can you confirm that portal.ourstartup.io now has an A record pointing somewhere, and tell me the TTL?"}],"resultDescription":"Returns whether the portal.<domain> A record exists, the resolved IPv4 address(es), the TTL value, and the DNS response code from Cloudflare DoH.","failureModes":["Domain does not exist (NXDOMAIN) — returns no records and appropriate response code","portal subdomain has no A record even though the apex domain exists","Invalid or malformed domain input — may return an error or empty result","Cloudflare DoH unreachable — service returns an error","Rate limiting or payment failure — request rejected"],"whenToPreferThis":"Use this endpoint when you need a fast, targeted existence check for the portal subdomain of a specific domain without doing full subdomain enumeration. Prefer it over generic DNS resolvers when you want a pay-per-use, agent-friendly API that specifically targets the portal host with a simple GET request.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-21T18:55:12.014Z","isFirstParty":false,"canonicalSlug":"dns-a-record-lookup-for-portal-subdomain-dc4bce3a"}