{"uid":"cap_H8_ruUchDYArcAaprkp8q","slug":"agentshelf-syntexa-ch-dkim-k3-txt-lookup-c4a0a77d","name":"agentshelf.syntexa.ch DKIM k3 TXT Lookup","description":"Call when an agent needs TXT at k3._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.009 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-k3 first.","url":"https://agentshelf.syntexa.ch/v1/dns-txt-dkim-k3?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"hostname":{"type":"string","examples":["example.com"],"maxLength":253,"minLength":1,"description":"Public DNS hostname such as example.com. Not a URL, not an IP literal, and not a private name."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.009","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":"$0.009/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.009","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_v-ldRmXwl1njorcUxuNXF","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.009","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Retrieves the DKIM TXT record at k3._domainkey.{hostname} for email authentication verification","exampleAgentPrompt":"Can you look up the DKIM TXT record at the k3 selector for example.com so I can verify their email signing key is properly published?","exampleUseCases":[{"title":"Verify DKIM k3 selector for outbound mail","prompt":"Check the k3 DKIM TXT record for myfirm.com — I need to confirm the public key is correctly published before we switch email providers."},{"title":"Audit email authentication on a third-party domain","prompt":"Pull the k3._domainkey DNS TXT record for newsletter.acme.io so I can audit their DKIM setup and see which key they're signing with."},{"title":"Debug missing DKIM during deliverability investigation","prompt":"Our emails from campaigns.brandco.net are landing in spam — can you fetch the k3 DKIM TXT record for campaigns.brandco.net to see if the key is actually there?"}],"resultDescription":"Returns the raw DNS TXT record value published at k3._domainkey.{hostname}, which typically contains a DKIM public key entry (e.g. v=DKIM1; k=rsa; p=...) or indicates the record is absent. The agent can use this to verify email signing configuration, compare key fingerprints, or diagnose deliverability issues.","failureModes":["Record does not exist — no TXT record found at k3._domainkey.{hostname}, returns empty or not-found result","Invalid hostname format — hostname exceeds 253 characters or is malformed, request rejected","DNS resolution failure — upstream DNS timeout or NXDOMAIN for the apex domain","Payment failure — x402 payment not processed, endpoint returns 402 before query executes"],"whenToPreferThis":"Use this endpoint when you specifically need the k3 DKIM selector TXT record. If the target domain uses a different DKIM selector (selector1, selector2, or a custom one), use the corresponding sibling endpoints. Try the free sandbox endpoint POST /v1/sandbox/dns-txt-dkim-k3 first before invoking this paid endpoint to avoid unnecessary charges.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-01T06:47:39.344Z","isFirstParty":false,"canonicalSlug":"agentshelf-syntexa-ch-dkim-k3-txt-lookup-c4a0a77d"}