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agentshelf.syntexa.ch SMTP DKIM TXT Lookup (smtp._domainkey)
x402
agentshelf.syntexa.ch SMTP DKIM TXT Lookup (smtp._domainkey) is a paid API for AI agents from agentshelf.syntexa.ch, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).
Looks up the DKIM TXT DNS record at smtp._domainkey.{hostname} and returns its value
Price / call$0.001
Success—
StatusUnknown
How this service works
Call when an agent needs TXT at smtp._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.001 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-smtp first.
Output
The DNS TXT record value published at smtp._domainkey.{hostname}, typically containing the DKIM public key and policy fields (e.g. v=DKIM1; k=rsa; p=...).
Example use cases
Verify SMTP DKIM DNS setup
“Check whether smtp._domainkey is properly configured for my domain acme.com — I need to see the raw TXT record to confirm DKIM is set up for SMTP sending.”
Audit email authentication for a client domain
“Can you pull the DKIM TXT record at smtp._domainkey.clientdomain.org? I'm auditing their email authentication setup and need to see what key is published for the smtp selector.”
Diagnose DKIM alignment issue
“I'm troubleshooting email delivery problems for newsletter.example.net — can you fetch the smtp._domainkey TXT record to see if the DKIM key matches what our mail server is using?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/dns-txt-dkim-smtp?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need the DKIM TXT record for the 'smtp' selector (smtp._domainkey.{hostname}). For other selectors (e.g. google._domainkey or pic._domainkey), use the corresponding sibling endpoints. Prefer the unpaid sandbox version (POST /v1/sandbox/dns-txt-dkim-smtp) when available and only use this paid endpoint when the sandbox is unavailable or not appropriate.
Side effects
- Domain does not exist or has no smtp._domainkey TXT record — returns empty or NXDOMAIN response
- Invalid hostname format — returns validation error
- DNS resolution timeout — returns error indicating lookup failure
- Network or upstream DNS error — returns service error
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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