{"uid":"cap_KiU1OZrCw7H4XvR5vmjMx","slug":"dkim-selector-sm-lookup-26656d7c","name":"DKIM Selector 'sm' Lookup","description":"DKIM public key for selector \"sm\" of a domain: looks up sm._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 sm selector will verify. $0.01 per lookup.","url":"https://dns.intel.rallylive.ca/dns/dkim/sm?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$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_p5N22mCf6uQVMILWcY4Sr","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 'sm' selector of a given domain via Cloudflare DoH, returning key type, length, testing flag, and revocation status.","exampleAgentPrompt":"Can you check the DKIM 'sm' selector for example.com — I want to know if the key is valid, what type and length it is, and whether it's revoked or in testing mode?","exampleUseCases":[{"title":"Email deliverability pre-flight check","prompt":"Before we launch the campaign, check whether the sm DKIM selector on acme.com is properly configured, not revoked, and has a strong enough key length."},{"title":"Security audit of email signing setup","prompt":"I'm auditing mailchimp-style sending for brandco.io — can you pull the sm._domainkey record and tell me the key type, bit length, and if the selector is in testing mode?"},{"title":"Troubleshooting DKIM verification failures","prompt":"Our transactional emails from startupxyz.com are failing DKIM checks — can you look up the sm selector and see if the public key is empty or revoked?"}],"resultDescription":"Returns parsed details from the sm._domainkey.<domain> TXT record including: DKIM version (v=), key type (k=), RSA/EC public key and its bit length, whether the selector is in testing mode (t=y flag), and whether the key is revoked (empty p= field). Confirms whether mail signed with the sm selector will successfully verify.","failureModes":["Domain does not have an sm._domainkey TXT record — returns not found or empty result","DNS resolution failure via Cloudflare DoH — transient network error","Malformed TXT record that cannot be parsed into DKIM fields","Empty p= field indicating revoked/disabled key, flagged explicitly","Rate limiting or payment failure for the $0.01 per lookup fee"],"whenToPreferThis":"Use this endpoint when you specifically need to inspect the 'sm' DKIM selector (used by some email service providers) for a domain. Prefer this over a generic DNS TXT lookup when you need structured parsing of DKIM fields (v=, k=, key length, testing flag, revocation) rather than a raw TXT string. Choose this over manual DNS tools when automating email authentication audits or deliverability checks at scale.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-20T00:59:28.148Z","isFirstParty":false,"canonicalSlug":"dkim-selector-sm-lookup-26656d7c"}