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DKIM Selector S1 Public Key Lookup
x402
DKIM Selector S1 Public Key Lookup is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-20).
Looks up and parses the DKIM public key for the 's1' selector of a given domain via Cloudflare DoH, returning key type, length, testing status, and revocation state.
Price / call$0.01
Success—
StatusUnknown
How this service works
DKIM public key for selector "s1" of a domain: looks up s1._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 s1 selector will verify. $0.01 per lookup.
Output
Returns parsed DKIM TXT record fields for the s1._domainkey.<domain> DNS entry, including the DKIM version (v=), key type (k=), public key length in bits, whether the testing flag is set, and whether the key is revoked (empty p= field). Also confirms whether mail signed with the s1 selector will pass DKIM verification.
Example use cases
Pre-send DKIM deliverability check
“Before we launch our email campaign, can you verify that our domain example.com has a properly configured and non-revoked DKIM key for the s1 selector?”
Email authentication troubleshooting
“Emails from newsletter.org are failing DKIM verification — can you look up the s1 selector DKIM record for that domain and tell me if the key is missing, revoked, or misconfigured?”
Domain security audit
“I'm auditing the email security posture of acmecorp.com — can you check the DKIM s1 selector and tell me the key type, length, and whether it's in testing mode?”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/dkim/s1?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you specifically need to inspect the 's1' DKIM selector for a domain — a common selector used by many ESPs and self-hosted mail servers. Prefer it over generic DNS TXT lookups when you need structured parsing of DKIM fields (key type, length, revocation) rather than raw TXT data. Use it for email deliverability checks, domain security audits, or debugging DKIM signing issues tied to the s1 selector.
Side effects
- Domain does not have an s1._domainkey TXT record (NXDOMAIN or empty response)
- DKIM record is malformed and cannot be parsed
- Key is revoked (empty p= field) — endpoint still returns data but flags revocation
- DNS resolution failure via Cloudflare DoH
- Invalid domain name input causing lookup error
- Rate limiting or payment failure (x402)
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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