{"uid":"cap_CQFcNrMhW7VO_dPZ7wBk2","slug":"dkim-selector-fm2-public-key-lookup-f42bf735","name":"DKIM Selector fm2 Public Key Lookup","description":"DKIM public key for selector \"fm2\" of a domain: looks up fm2._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 fm2 selector will verify. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/dkim/fm2?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_QBdIuE332SZckHzivbloy","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 'fm2' selector of a given domain, confirming mail signed with that selector will verify.","exampleAgentPrompt":"Check the DKIM fm2 selector for example.com — look up fm2._domainkey.example.com and tell me the key type, public key length, whether it's in testing mode, and if the key has been revoked.","exampleUseCases":[{"title":"Verify email sender DKIM setup","prompt":"I need to confirm that emails sent from fastmail.com using the fm2 DKIM selector will actually pass DKIM verification — can you look up the fm2 key and tell me if it's valid, what type it is, and whether it's been revoked?"},{"title":"Diagnose DKIM misconfiguration","prompt":"We're having email deliverability issues with our domain acme.com. Can you check the fm2 DKIM selector and tell me if the public key is present, what length it is, and whether anything looks wrong with the configuration?"},{"title":"Audit DKIM testing mode flag","prompt":"Before we take our new mail system live for newsletter.io, check the fm2 DKIM selector and confirm whether the key is still in testing mode or if it's been promoted to production."}],"resultDescription":"Returns the parsed contents of the fm2._domainkey.<domain> DNS TXT record, including the DKIM version (v=), key type (k=, e.g. rsa or ed25519), public key length in bits, whether the testing flag is set, and whether the key is revoked (empty p= field). Confirms whether mail signed with the fm2 selector will pass DKIM verification.","failureModes":["Domain does not have an fm2._domainkey TXT record — returns not found or empty result","DNS resolution failure via Cloudflare DoH — network or upstream error","Malformed TXT record that cannot be parsed into DKIM fields","Revoked key detected (empty p=) — indicates intentionally disabled selector","Domain input missing or invalid — returns validation error"],"whenToPreferThis":"Use this endpoint when you specifically need to inspect the DKIM 'fm2' selector for a domain, particularly for Fastmail-hosted domains that use fm2 as a standard selector. Prefer this over generic DNS TXT lookup endpoints when you need structured DKIM field parsing (v=, k=, key length, testing flag, revocation status) rather than raw TXT record text. Ideal for email deliverability audits, DKIM configuration validation, and security checks.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:36.228Z","isFirstParty":false,"canonicalSlug":"dkim-selector-fm2-public-key-lookup-f42bf735"}