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mailcheck-dx MX DNS Validator
x402
mailcheck-dx MX DNS Validator is a paid API for AI agents from mailcheck-dx.hugen.tokyo, paid per call via x402, $0.005/call, status down (last checked 2026-09-15).
Performs MX DNS lookups and validates domain mail server configuration, including basic SMTP reachability and MX record checks.
Price / call$0.005
Success—
StatusDown
How this service works
Performs MX DNS lookups and validates domain mail server configuration, including basic SMTP reachability and MX record checks.
Output
Returns MX record details for the queried domain along with SMTP reachability status, indicating whether the domain's mail server infrastructure is properly configured and capable of receiving email.
Example use cases
Example prompt
“Can you check whether the domain gmail.com has valid MX records and a reachable mail server — I want to confirm it can actually receive email before I send to addresses there.”
Technical details
Endpoint
POSThttps://mailcheck-dx.hugen.tokyo/mxWhen to prefer
Use this endpoint when you need to verify that a domain's mail infrastructure is properly set up at the DNS level before sending email, or when validating email addresses where domain-level deliverability (MX records + SMTP reachability) is the primary concern rather than full address-level validation.
Side effects
- Domain does not exist or has no MX records — returns empty or error result
- DNS lookup timeout if the domain's nameservers are unresponsive
- SMTP reachability check blocked by firewall or rate-limiting on the mail server
- Invalid domain format in request body — returns validation error
- Payment failure via x402 protocol — request rejected before processing
Tags
x402
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