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DKIM Selector fm2 Public Key Lookup
x402
DKIM Selector fm2 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 'fm2' selector of a given domain, confirming mail signed with that selector will verify.
Price / call$0.01
Success—
StatusUnknown
How this service works
DKIM public key for selector "fm2" of a domain: looks up fm2._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 fm2 selector will verify. $0.01 per lookup.
Output
Returns the parsed contents of the fm2._domainkey.<domain> DNS TXT record, including the DKIM version (v=), key type (k=, e.g. rsa or ed25519), public key length in bits, whether the testing flag is set, and whether the key is revoked (empty p= field). Confirms whether mail signed with the fm2 selector will pass DKIM verification.
Example use cases
Verify email sender DKIM setup
“I need to confirm that emails sent from fastmail.com using the fm2 DKIM selector will actually pass DKIM verification — can you look up the fm2 key and tell me if it's valid, what type it is, and whether it's been revoked?”
Diagnose DKIM misconfiguration
“We're having email deliverability issues with our domain acme.com. Can you check the fm2 DKIM selector and tell me if the public key is present, what length it is, and whether anything looks wrong with the configuration?”
Audit DKIM testing mode flag
“Before we take our new mail system live for newsletter.io, check the fm2 DKIM selector and confirm whether the key is still in testing mode or if it's been promoted to production.”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/dkim/fm2?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to inspect the DKIM 'fm2' selector for a domain, particularly for Fastmail-hosted domains that use fm2 as a standard selector. Prefer this over generic DNS TXT lookup endpoints when you need structured DKIM field parsing (v=, k=, key length, testing flag, revocation status) rather than raw TXT record text. Ideal for email deliverability audits, DKIM configuration validation, and security checks.
Side effects
- Domain does not have an fm2._domainkey TXT record — returns not found or empty result
- DNS resolution failure via Cloudflare DoH — network or upstream error
- Malformed TXT record that cannot be parsed into DKIM fields
- Revoked key detected (empty p=) — indicates intentionally disabled selector
- Domain input missing or invalid — returns validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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