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MX Record Lookup
x402
MX Record Lookup is a paid API for AI agents from email-verify-api-production-d262.up.railway.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Returns raw MX records (preference value + exchange hostname) for a given domain, sorted by preference.
Price / call$0.001
Success—
StatusUnknown
How this service works
Return raw MX records (preference + exchange host) for a domain, sorted by preference.
Output
A list of MX records for the requested domain, each containing a numeric preference value and the exchange hostname, sorted in ascending order of preference (lower number = higher priority).
Example use cases
Diagnose email delivery failures
“We're having trouble delivering emails to clients at acme.com — can you fetch the raw MX records for acme.com so I can see which mail servers are configured and in what priority order?”
Validate domain mail routing setup
“I just set up a new domain for my company, newbrand.io — can you look up the MX records and show me the preference values and exchange hostnames to confirm our mail routing is configured correctly?”
Audit third-party mail provider
“I want to know which email provider handles mail for competitor.com — can you pull the MX records for competitor.com and tell me the exchange hostnames sorted by preference?”
Technical details
Endpoint
POSThttps://email-verify-api-production-d262.up.railway.app/mx-lookupWhen to prefer
Use this endpoint when you need raw, unfiltered MX record data for a domain — including preference values and all exchange hostnames — rather than just a boolean check on whether MX records exist. Prefer this over the domain-check endpoint when you need the actual server hostnames for routing analysis, SMTP configuration auditing, or mail provider identification.
Side effects
- Domain does not exist or has no MX records — returns empty list or error
- Invalid domain format provided — returns validation error
- DNS resolution timeout or upstream failure — returns error indicating lookup failure
- Rate limiting or payment failure for x402 micropayment — returns 402 or 429 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | Domain to fetch raw MX records for, e.g. 'acme.com'. |
Tags
x402
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