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DKIM TXT Record Lookup — cm Selector
x402
DKIM TXT Record Lookup — cm Selector is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-01).
Retrieves the DKIM TXT DNS record at the cm._domainkey.<hostname> selector for a given domain
Price / call$0.01
Success—
StatusUnknown
How this service works
Call when an agent needs TXT at cm._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-cm first.
Output
Returns the TXT record value published at cm._domainkey.<hostname> in DNS, which typically contains the DKIM public key and policy flags used for email authentication verification.
Example use cases
Email deliverability audit
“Can you check the DKIM TXT record for the cm selector on example.com? I want to see what public key is published for email signing.”
DKIM configuration verification
“We just set up DKIM on our domain mailserver.io — can you pull the TXT record at cm._domainkey to confirm it's live and correct?”
Troubleshoot email authentication failure
“Emails from newsletter.org are failing DKIM checks on the cm selector — can you look up the TXT DNS record at cm._domainkey.newsletter.org so I can see what's there?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/dns-txt-dkim-cm?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need the DKIM TXT record for the 'cm' selector (i.e. the DNS name cm._domainkey.<hostname>). If you need a different DKIM selector, that is a different DNS name and a different endpoint. Prefer the free sandbox endpoint (unpaid POST /v1/sandbox/dns-txt-dkim-cm) for testing before paying $0.01 USDC per call on this production endpoint.
Side effects
- Hostname does not exist in DNS — returns error or empty result
- No TXT record exists at cm._domainkey.<hostname> — record not found response
- Invalid hostname format (too long, empty, or malformed) — validation error
- DNS resolution timeout or network error — transient failure
- Domain exists but no DKIM record for cm selector specifically — empty or NXDOMAIN result
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| hostname | string | Public DNS hostname such as example.com. Not a URL, not an IP literal, and not a private name. |
Tags
x402
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