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DNS A Record Lookup for api.<domain> Subdomain via Cloudflare DoH
x402
DNS A Record Lookup for api.<domain> Subdomain via Cloudflare DoH is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-21).
Looks up the A (IPv4 address) DNS record for the 'api' subdomain of a given domain using Cloudflare DNS over HTTPS, returning existence status, records, and TTL.
Price / call$0.01
Success—
StatusUnknown
How this service works
A record of api.<domain>: looks up the api 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 api without enumerating subdomains. $0.01 per lookup.
Output
Returns whether api.<domain> exists in DNS, its A record(s) with associated IPv4 addresses, the TTL value, and the DNS response code — all as resolved by Cloudflare's 1.1.1.1 DNS over HTTPS resolver.
Example use cases
Verify API subdomain before integration
“Before I start integrating with Acme Corp's API, can you check if api.acmecorp.com actually resolves to an IP address via DNS?”
Infrastructure audit for client domain
“I'm auditing myclient.io — can you tell me if their api subdomain has a valid A record and what IP it points to?”
Competitive recon on API presence
“I want to know if competitor.com has an active api subdomain — check if api.competitor.com resolves in DNS and what its TTL is.”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/host/api/a?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, low-cost existence check specifically for the 'api' subdomain of a given domain without performing broad subdomain enumeration. Prefer this over general DNS lookup tools when you want Cloudflare DoH resolution with a simple pay-per-query model and need the result quickly. It is ideal for integration verification, infrastructure audits, and recon tasks where the target subdomain is specifically 'api'.
Side effects
- Domain does not exist (NXDOMAIN) — returns no records and a non-zero response code
- api subdomain has no A record (e.g. only CNAME or MX records) — returns empty record set
- Invalid or malformed domain input — may return error or empty response
- Cloudflare DoH resolver temporarily unavailable — request may time out or return an error
- Network or payment failure — $0.01 USDC charge may not be processed and request not fulfilled
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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