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DKIM Selector3 TXT Record Lookup
x402
DKIM Selector3 TXT Record Lookup 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 record at selector3._domainkey.{hostname} via DNS lookup
Price / call$0.01
Success—
StatusUnknown
How this service works
Call when an agent needs TXT at selector3._domainkey.{hostname}. A different selector is a different DNS name. Exact $0.01 USDC. Prefer unpaid POST /v1/sandbox/dns-txt-dkim-selector3 first.
Output
Returns the raw DNS TXT record string found at selector3._domainkey.{hostname}, typically containing the DKIM public key (p= field) and policy parameters used for email authentication verification.
Example use cases
Audit email DKIM configuration
“Check whether example.com has a valid DKIM key set up under the selector3 selector — fetch the TXT record at selector3._domainkey.example.com for me.”
Verify outbound mail signing setup
“I just configured DKIM for my domain newsletter.mycompany.com with selector3 — can you pull the DNS TXT record at selector3._domainkey.mycompany.com to confirm it propagated correctly?”
Diagnose email deliverability issues
“We're having email deliverability problems for acme.io — can you look up the selector3 DKIM TXT record to see if it's missing or misconfigured?”
Technical details
Endpoint
POSThttps://agentshelf.syntexa.ch/v1/dns-txt-dkim-selector3?utm_source=zero.xyzWhen to prefer
Use this endpoint specifically when you need the DKIM TXT record for the selector named 'selector3'. It is a targeted DNS lookup for that exact selector subdomain. If the selector name is different (e.g. selector1, selector2, google, s1), use the corresponding endpoint for that selector. Prefer the free sandbox endpoint (/v1/sandbox/dns-txt-dkim-selector3) before paying $0.01 USDC for this production call.
Side effects
- Domain does not exist — DNS NXDOMAIN response
- No TXT record found at selector3._domainkey.{hostname} — selector not configured
- hostname parameter missing or invalid (empty string or exceeds 253 characters)
- DNS timeout or resolution failure
- Malformed hostname input rejected before lookup
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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