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DKIM Public Key Lookup
x402
DKIM Public Key Lookup is a paid API for AI agents from agent402.tools, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-14).
Fetches and parses the DKIM TXT record at <selector>._domainkey.<domain>, returning key algorithm, length, and flags for rotation/strength verification.
Price / call$0.002
Success—
StatusUnknown
How this service works
Fetch and parse a DKIM public-key record at <selector>._domainkey.<domain> (RFC 6376). Returns the parsed key params (algorithm, length, flags) so you can verify rotation status or key strength. Caller must know the selector - use email-deliverability if you don't.
Output
Returns parsed DKIM record parameters including the public key algorithm (e.g. RSA), key bit length (e.g. 2048), flags, and other key metadata from the DNS TXT record at <selector>._domainkey.<domain>.
Example use cases
Example prompt
“Can you look up the DKIM public key for example.com using the selector 'google' and tell me the algorithm, key length, and any flags set?”
Technical details
Endpoint
POSThttps://agent402.tools/api/dkim-lookupWhen to prefer
Use this endpoint when you need to programmatically inspect a DKIM public key record for a known selector — for example, auditing key strength, confirming rotation after a key change, or verifying a domain's email authentication setup. Prefer this over manual DNS tools when you need structured parsed output (algorithm, key length, flags) rather than a raw TXT string.
Side effects
- DKIM record not found — selector or domain does not exist in DNS
- Invalid domain format — domain cannot be resolved
- Selector not specified or incorrect — wrong selector name returns no record
- DNS lookup timeout — transient network error
- Malformed DKIM TXT record — cannot be parsed
Input
{
"domain": "example.com",
"selector": "google"
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| domain | string | Domain name (also accepts email/url/host) |
| selector | string | DKIM selector, e.g. "default", "google", "selector1" |
Output
{
"raw": "v=DKIM1; p=",
"flags": [],
"domain": "example.com",
"keyType": "rsa",
"version": "DKIM1",
"fullName": "google._domainkey.example.com",
"selector": "google",
"warnings": [
"Public key is empty — DKIM selector is revoked (rotated out)"
],
"hasRecord": true,
"publicKey": {
"bits": null,
"base64": null,
"revoked": true
},
"serviceType": "*",
"hashAlgorithms": []
}Schema · Response
{
"type": "json",
"example": {
"raw": "v=DKIM1; k=rsa; p=MIIBIj...",
"flags": [],
"domain": "google.com",
"keyType": "rsa",
"version": "DKIM1",
"fullName": "20221208._domainkey.google.com",
"selector": "20221208",
"warnings": [],
"hasRecord": true,
"publicKey": {
"bits": 2048,
"base64": "MIIBIj...",
"revoked": false
},
"serviceType": "*",
"hashAlgorithms": []
}
}Tags
x402
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