{"uid":"cap_sY1IAJUSA4H3BueiJ4laH","slug":"dkim-selector-ctct1-lookup-c71b8da0","name":"DKIM Selector ctct1 Lookup","description":"DKIM public key for selector \"ctct1\" of a domain: looks up ctct1._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 ctct1 selector will verify. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/dkim/ctct1?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_7e6FhkP4AgxG_ZJyccYHV","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 'ctct1' selector of a given domain, reporting key type, length, testing flag, and revocation status.","exampleAgentPrompt":"Can you check if the ctct1 DKIM selector is properly set up and not revoked for example.com?","exampleUseCases":[{"title":"Verify Constant Contact DKIM setup","prompt":"Check whether the ctct1 DKIM key is correctly published and active for my domain acmecorp.com — I want to make sure Constant Contact emails will pass DKIM verification."},{"title":"Audit email domain security posture","prompt":"I'm auditing the email authentication records for newsletter.org. Can you look up the ctct1 DKIM selector and tell me the key type, length, and whether it's been revoked?"},{"title":"Diagnose email deliverability issue","prompt":"Emails sent through Constant Contact from mybrand.com keep failing DKIM — can you check the ctct1 selector to see if the key is missing, revoked, or flagged as testing-only?"}],"resultDescription":"Returns parsed details from the ctct1._domainkey.<domain> TXT record, including the DKIM version (v=), key type (k=), public key length in bits, whether the key is in testing mode, and whether the key is revoked (empty p= field). Confirms if mail signed with the ctct1 selector will successfully verify.","failureModes":["Domain has no ctct1 DKIM TXT record — returns not-found or empty result","TXT record is malformed or missing required tags — parsing may be partial","Key is revoked (empty p=) — reported as revoked, not an error","DNS resolution failure via Cloudflare DoH — network or timeout error","Invalid or non-existent domain input — DNS NXDOMAIN response"],"whenToPreferThis":"Use this endpoint when you specifically need to validate the DKIM configuration for the 'ctct1' selector, which is commonly associated with Constant Contact email marketing. Prefer this over generic DNS TXT lookups when you need structured parsing of DKIM record fields (key type, length, revocation, testing flag) rather than the raw record string.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:06.983Z","isFirstParty":false,"canonicalSlug":"dkim-selector-ctct1-lookup-c71b8da0"}