{"uid":"cap_LUUtCQDA5AVJcYDeckX7V","slug":"pennyrail-mx-dns-records-lookup-80c9c8a7","name":"PennyRail MX DNS Records Lookup","description":"Machine-readable settlement service","url":"https://pennyrail.vercel.app/api/p/nano/dns.records--mx-lookup","method":"POST","headers":{},"bodySchema":{"type":"object","required":["input"],"properties":{"input":{"type":"object"}}},"responseSchema":{"type":"object","additionalProperties":true},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_6xeyDGP0RAX5pzaRjvejr","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Performs an MX (Mail Exchange) DNS record lookup for a given domain, returning its mail server records","exampleAgentPrompt":"Can you look up the MX records for example.com so I can see which mail servers handle its incoming email and their priority values?","exampleUseCases":[{"title":"Email deliverability pre-flight check","prompt":"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?"},{"title":"Troubleshoot missing email deliveries","prompt":"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?"},{"title":"Competitor email infrastructure audit","prompt":"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?"}],"resultDescription":"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.","failureModes":["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"],"whenToPreferThis":"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.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-14T06:44:43.386Z","isFirstParty":false}