{"uid":"cap_HQVI2oP4UAlvYtPoN2Bm3","slug":"sitecheck-web-intel-dkim-key-checker-f69492d9","name":"SiteCheck Web Intel DKIM Key Checker","description":"Reads the DKIM public key published at <selector>._domainkey.<domain>: key type, whether it is revoked (empty p=), decoded key size in bytes and a strength hint (about 1024-bit vs 2048-bit RSA), and basic syntax (v=DKIM1). Follows one CNAME, which large providers use. Does not check a signed message.","url":"https://api.webintel-api.workers.dev/api/security/dkim-key-checker?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","required":["domain","selector"],"properties":{"domain":{"type":"string","description":"Sending domain such as mailchimp.com (required)"},"selector":{"type":"string","description":"DKIM selector such as k1 or google (required)"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.002","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":"$0.002/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.002","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_R1gLFm4Go0_cABcShTp91","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.002","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Looks up and analyzes the DKIM public key DNS record for a given domain and selector, reporting key type, revocation status, key size, strength, and syntax validity.","exampleAgentPrompt":"Can you check the DKIM public key for the selector 'k1' on domain 'mailchimp.com' — I want to know if it's revoked, what key size it uses, and whether the syntax looks correct?","exampleUseCases":[{"title":"Verify email sender DKIM strength","prompt":"Check the DKIM key for the selector 'google' on domain 'gmail.com' — is it a 2048-bit key or something weaker, and is it still valid?"},{"title":"Detect revoked DKIM key for domain","prompt":"I'm seeing email deliverability issues from our old domain — can you look up the DKIM record for selector 's1' on 'olddomain.example.com' and tell me if the key has been revoked?"},{"title":"Audit third-party ESP DKIM config","prompt":"We use Sendgrid for our newsletters — can you pull the DKIM key for selector 'em1' on 'sendgrid.net' and tell me the key type, size, and whether the syntax is valid?"}],"resultDescription":"Returns the DKIM public key record details for the given domain and selector: key type (e.g. RSA), whether the key is revoked (empty p= field), decoded key size in bytes, a human-readable strength hint (approximately 1024-bit vs 2048-bit RSA), basic DKIM syntax validity (v=DKIM1 tag check), and whether a CNAME was followed to resolve the record.","failureModes":["Domain or selector does not exist in DNS — returns not found or empty result","DKIM record is syntactically malformed — may return a parse error or partial data","CNAME chain deeper than one hop — only one CNAME redirect is followed","Network or DNS resolution timeout — returns error","Missing required query parameters (domain or selector) — returns validation error"],"whenToPreferThis":"Use this endpoint when you need to quickly inspect a DKIM DNS record for a specific domain and selector without setting up DNS tooling yourself. It is ideal for validating DKIM key presence, checking for revocation, and assessing cryptographic key strength (1024-bit vs 2048-bit) in automated security audits or email deliverability workflows. It handles CNAME indirection used by major ESPs, making it practical for checking third-party sending infrastructure. Prefer it over raw DNS lookups when you need parsed, interpreted output rather than raw TXT record strings.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-25T12:31:26.889Z","isFirstParty":false,"canonicalSlug":"sitecheck-web-intel-dkim-key-checker-f69492d9"}