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PennyRail MX DNS Records Lookup
x402
PennyRail MX DNS Records Lookup is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Performs an MX (Mail Exchange) DNS record lookup for a given domain, returning its mail server records
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a structured object containing the MX DNS records for the queried domain, including mail exchange hostnames and their associated priority values, reflecting live DNS resolution results.
Example use cases
Email deliverability pre-flight check
“Before we send our campaign, can you look up the MX records for acmecorp.com to confirm they have mail servers configured and tell me their priorities?”
Troubleshoot missing email deliveries
“Our emails to clients at clientdomain.com keep bouncing — can you fetch the MX DNS records for clientdomain.com so I can see if their mail servers are set up correctly?”
Competitor email infrastructure audit
“I want to know which email provider rival-startup.io is using — can you pull their MX records and tell me the mail exchange hostnames and priorities?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/dns.records--mx-lookupWhen to prefer
Use this endpoint when you need a pay-per-call, programmatic MX DNS lookup with no subscription or API key required, especially in agent workflows where x402 micropayment settlement is already in use. Prefer over free DNS tools when operating within a PennyRail or x402-enabled payment pipeline.
Side effects
- Domain does not exist or has no MX records — returns empty record set or DNS NXDOMAIN error
- Malformed or missing input domain — may return 400-level validation error
- DNS resolution timeout — upstream resolver may fail for non-responsive nameservers
- Payment failure via x402 protocol — call blocked before execution if USDC payment is not settled
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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