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DNS A Record Lookup for MX Subdomain
x402
DNS A Record Lookup for MX Subdomain is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Looks up the A record for the mx.<domain> host via Cloudflare DoH and reports whether it exists, its IP records, and TTL
Price / call$0.01
Success—
StatusUnknown
How this service works
A record of mx.<domain>: looks up the mx 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 mx without enumerating subdomains. $0.01 per lookup.
Output
Returns whether the mx.<domain> A record exists, the resolved IP address(es), and the TTL of the record. If the host does not exist, indicates non-existence.
Example use cases
Email server infrastructure validation
“Does mx.example.com actually resolve to an IP? I want to confirm the MX host has a proper A record before I configure our mail server to relay through it.”
Pre-send domain deliverability check
“Before we send out this email campaign, can you verify that mx.ourdomain.com has a valid A record and tell me its current TTL?”
Competitor email infrastructure recon
“I'm doing a quick recon on competitor.com — can you check if their mx subdomain resolves and what IP it points to?”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/host/mx/a?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a fast, cheap ($0.01) existence and IP check specifically for the mx.<domain> host without enumerating all subdomains. Prefer it over generic DNS APIs when you want Cloudflare DoH-backed resolution with a simple REST interface and per-call micropayment pricing for lightweight spot-checks.
Side effects
- Domain does not exist — NXDOMAIN returned, existence flag is false
- MX subdomain has no A record — host exists but no address record
- Malformed domain input — query fails with validation error
- Cloudflare DoH upstream timeout — transient failure
- Rate limiting or payment failure — 402 response if payment not attached
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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