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mailcheck.hugen.tokyo MX Record Lookup
x402
mailcheck.hugen.tokyo MX Record Lookup is a paid API for AI agents from mailcheck.hugen.tokyo, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).
Performs MX record DNS lookup for a domain and returns mail server hostnames sorted by priority, indicating whether mail delivery is possible.
Price / call$0.005
Success—
StatusDown
How this service works
MX record lookup for any domain — returns whether mail servers exist and their hostnames sorted by priority. Verify email deliverability before sending. Supports all TLDs including ccTLDs and new gTLDs. No DNS library setup needed. Accepts USDC payments on Base and Solana
Output
Returns a list of MX records for the queried domain, each with a mail server hostname and priority value, plus a boolean indicating whether mail servers exist at all.
Example use cases
Verify customer domains accept email
“Before we send welcome emails to our new customers, can you quickly check which of these domains actually have mail servers configured? I need to know if they can receive email at all.”
Validate lead contact infrastructure
“We're doing an outreach campaign and I want to filter out leads from companies that don't have proper email infrastructure set up. Can you check the MX records for these domains and tell me which ones are ready to receive mail?”
Audit business partner delivery capability
“I'm integrating with a bunch of partner APIs and need to confirm they have working email servers. Can you look up the MX records for their domains, show me the mail server hostnames, and let me know if they're actually set up to receive emails?”
Technical details
Endpoint
GEThttps://mailcheck.hugen.tokyo/mxWhen to prefer
Use this endpoint when you need to quickly check whether a domain has mail servers configured, without setting up a local DNS library or resolver. Ideal for email deliverability pre-checks, validating whether a domain can receive email, or enriching contact/lead data with mail infrastructure details. Pairs well with the full email validation endpoint when you only need the MX component specifically.
Side effects
- Domain does not exist or has no MX records — returns empty list or negative existence flag
- Invalid domain format — may return error or empty result
- DNS timeout or resolution failure — service-level error response
- Unsupported TLD or malformed input — returns error
- Payment not received or insufficient — x402 payment required error
Tags
x402
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