{"uid":"cap_zlk6SxjzUZlpxydgz-jwC","slug":"dns-a-record-lookup-for-db-subdomain-via-cloudflare-doh-9cd488bf","name":"DNS A Record Lookup for db Subdomain via Cloudflare DoH","description":"A record of db.<domain>: looks up the db 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 db without enumerating subdomains. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/host/db/a?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_ew24VBstp1iP3uKVl5f1b","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 (IPv4 address) for the db.<domain> subdomain using Cloudflare DNS over HTTPS, returning existence status, IP records, and TTL.","exampleAgentPrompt":"Can you check if db.acmecorp.com exists in DNS and tell me its IPv4 address and TTL?","exampleUseCases":[{"title":"Verify database host before deployment","prompt":"Before I push to production, can you check if db.myapp.io resolves to an IP address and tell me the TTL and A record?"},{"title":"Audit domain infrastructure for a client","prompt":"I need to know whether db.clientsite.com has a DNS A record configured — can you look it up and tell me if it exists and what it points to?"},{"title":"Check competitor's database subdomain","prompt":"Does db.competitorsite.com exist in DNS? What IP does it resolve to and how long is the TTL?"}],"resultDescription":"Returns whether the db.<domain> subdomain exists in DNS, the A (IPv4) record(s) associated with it, the TTL value, and the DNS response code — all sourced from Cloudflare's DNS over HTTPS resolver.","failureModes":["Domain does not exist (NXDOMAIN) — returns not-found status with no records","db subdomain has no A record but domain exists — empty record set returned","Invalid or malformed domain input — may return an error or empty response","Cloudflare DoH temporarily unavailable — upstream timeout or error","Rate limiting or payment failure — 402 payment required error"],"whenToPreferThis":"Use this endpoint when you need a fast, single-shot existence and IP resolution check for the db subdomain of a specific domain without performing full subdomain enumeration. It's ideal for infrastructure audits, pre-deployment checks, or domain intelligence workflows where you specifically need the db host and want Cloudflare DoH resolution fidelity. Prefer it over general DNS tools when you want a pay-per-use, no-setup lookup with structured output.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:31.276Z","isFirstParty":false,"canonicalSlug":"dns-a-record-lookup-for-db-subdomain-via-cloudflare-doh-9cd488bf"}