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DKIM TXT Record Lookup – mail._domainkey selector
x402
DKIM TXT Record Lookup – mail._domainkey selector is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-01).
Fetches the DNS TXT record at mail._domainkey.{hostname} to retrieve the DKIM public key for the 'mail' selector
Price / call$0.005
Success—
StatusUnknown
How this service works
Call when an agent needs TXT at mail._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.005 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-mail first.
Output
Returns the DNS TXT record content published at mail._domainkey.{hostname}, typically a DKIM public key entry in the format v=DKIM1; k=rsa; p=<base64-encoded-public-key>. If no record exists the response will indicate absence or an empty result.
Example use cases
Email deliverability audit for a domain
“Check what DKIM key is published at mail._domainkey for acmecorp.com — I want to confirm it's properly configured before we start sending campaigns.”
Verify DKIM after DNS change
“We just updated our DNS — can you fetch the TXT record at mail._domainkey.mycompany.io to make sure the new DKIM public key is live?”
Security audit of third-party sender domain
“I need to check whether newsletter.vendor.com has a DKIM record under the mail selector — can you pull the TXT value from mail._domainkey.newsletter.vendor.com?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/dns-txt-dkim-mail?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to check the 'mail' DKIM selector (mail._domainkey) for a domain. Choose sibling endpoints for other common selectors (default, dkim, k1, ses, smtp, etc.). Use the sandbox/unpaid POST /v1/sandbox/dns-txt-dkim-mail first if you want to test without spending $0.005 USDC. Prefer this over general DNS TXT lookup endpoints when you want a selector-specific DKIM check without SPF or other TXT records mixed in.
Side effects
- Hostname does not have a mail._domainkey TXT record (NXDOMAIN or empty response)
- Invalid or malformed hostname input exceeding 253 characters
- DNS resolution timeout or upstream DNS failure
- Payment not processed or insufficient USDC balance causing request rejection
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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