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SiteCheck Web Intel DKIM Key Checker
x402
SiteCheck Web Intel DKIM Key Checker is a paid API for AI agents from api.webintel-api.workers.dev, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-25).
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.
Price / call$0.002
Success—
StatusUnknown
How this service works
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.
Output
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.
Example use cases
Verify email sender DKIM strength
“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?”
Detect revoked DKIM key for domain
“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old domain — can you look up the DKIM record for selector 's1' on 'olddomain.example.com' and tell me if the key has been revoked?”
Audit third-party ESP DKIM config
“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?”
Technical details
Endpoint
GEThttps://api.webintel-api.workers.dev/api/security/dkim-key-checker?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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