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DKIM Selector fm1 Public Key Lookup
x402
DKIM Selector fm1 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 'fm1' selector of a given domain, verifying signing capability via DNS TXT record resolution.
Price / call$0.01
Success—
StatusUnknown
How this service works
DKIM public key for selector "fm1" of a domain: looks up fm1._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 fm1 selector will verify. $0.01 per lookup.
Output
Returns the parsed DKIM TXT record for fm1._domainkey.<domain>, including the DKIM version (v=), key type (k=), public key length in bits, whether the record is in testing mode, and whether the key has been revoked (empty p= field). Confirms whether mail signed with the fm1 selector will pass DKIM verification.
Example use cases
Fastmail DKIM configuration audit
“Check the fm1 DKIM selector record for my domain mycompany.com — I need to know if the fm1 public key is present and valid, or if it's been revoked, since we use Fastmail for sending.”
Email deliverability troubleshooting
“Our emails signed with the fm1 selector are failing DKIM verification — can you look up the fm1._domainkey TXT record for startupco.io and tell me the key type, length, and whether the p= value is empty?”
Security posture review of DKIM keys
“I'm auditing email security for newsletter.org — pull the fm1 DKIM selector and tell me if it's in testing mode, what the key length is, and whether the record looks properly configured.”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/dkim/fm1?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to inspect the 'fm1' DKIM selector, commonly associated with Fastmail-hosted domains or services using the fm1 signing key. Prefer this over generic DNS TXT lookups when you need structured DKIM field parsing (v=, k=, key length, revocation status) rather than raw TXT data. Choose sibling selectors (sfmc, bluehost, constantcontact) when investigating other email service providers.
Side effects
- Domain does not have an fm1._domainkey TXT record — returns not-found or empty result
- DNS resolution failure via Cloudflare DoH — network or upstream timeout
- Domain input missing or malformed — validation error
- Key is revoked (p= field is empty) — returned as a parsed flag, not an error
- Non-standard or unparseable DKIM record format — partial parse result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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