{"uid":"cap_93cNTt5hVlvBYQk5f9N4B","slug":"dkim-gmass-selector-lookup-4cb067c5","name":"DKIM GMass Selector Lookup","description":"DKIM public key for selector \"gmass\" of a domain: looks up gmass._domainkey.<domain> (TXT, Cloudflare DoH) and parses v=, k=, key type, public-key length, testing flag and whether the key is revoked (empty p=). Confirms that mail signed with the gmass selector will verify. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/dkim/gmass?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","properties":{}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_C_c5XVgbNoH8go4-uOM9A","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up and parses the DKIM public key for the 'gmass' selector of a given domain, confirming email signing validity and key health.","exampleAgentPrompt":"Check the DKIM gmass selector for acme.com — I want to know if the key is valid, what type and length it is, and whether it's been revoked.","exampleUseCases":[{"title":"Pre-send GMass deliverability check","prompt":"Before I send a campaign through GMass using mycompany.com, can you check if the gmass DKIM selector is properly set up on that domain and whether the key is valid and not revoked?"},{"title":"Debug failed DKIM verification","prompt":"Emails sent via GMass from newsletter.org are failing DKIM verification — can you look up the gmass._domainkey record for newsletter.org and tell me what the key says, its length, and if anything looks wrong?"},{"title":"Audit domain email authentication setup","prompt":"I'm doing an email security audit for startupxyz.io — please check the DKIM gmass selector record and tell me the key type, length, and whether it has a testing flag set."}],"resultDescription":"Returns parsed details of the gmass._domainkey.<domain> TXT record including: DKIM version (v=), key type (k=), public key, public-key bit length, whether the testing flag is set, and whether the key is revoked (empty p= field). Confirms if mail signed with the gmass selector will successfully verify.","failureModes":["Domain has no gmass._domainkey TXT record (record not found)","DNS lookup timeout or Cloudflare DoH unavailability","Malformed TXT record that cannot be parsed","Empty p= field indicating a revoked key (returned as data, not error)","Invalid domain name input"],"whenToPreferThis":"Use this endpoint when you specifically need to verify the GMass DKIM selector (gmass._domainkey) for a domain — for example, when auditing GMass email campaign deliverability, debugging DKIM failures for GMass-sent mail, or confirming a domain is correctly configured for GMass sending. Prefer this over generic DKIM tools when the selector is known to be 'gmass' and you need parsed key metadata including revocation and testing flags.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:51:05.066Z","isFirstParty":false,"canonicalSlug":"dkim-gmass-selector-lookup-4cb067c5"}