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dns-txt-mta-sts-subdomain
x402
dns-txt-mta-sts-subdomain 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 the TXT DNS record for the _mta-sts subdomain of a given domain via Cloudflare DoH and reports existence, record values, and TTL.
Price / call$0.01
Success—
StatusUnknown
How this service works
TXT record of _mta-sts.<domain>: looks up the _mta-sts host under the domain you give (TXT via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like _mta-sts without enumerating subdomains. $0.01 per lookup.
Output
Returns whether the _mta-sts TXT record exists for the given domain, the record content (e.g. version tag like 'v=STSv1; id=...'), the TTL, and the DNS response code. If the record does not exist, the response indicates absence.
Example use cases
Email security audit for domain
“I'm auditing the email security setup for acme.com — can you check whether _mta-sts TXT record exists and tell me the record value and TTL?”
Verify MTA-STS before mail server migration
“Before we migrate mail for startup.io, can you confirm their _mta-sts TXT record is in place and what version it's reporting?”
Troubleshoot missing MTA-STS policy
“Our email deliverability team says MTA-STS isn't working for brandco.com — can you check if the _mta-sts TXT record actually exists in DNS and what it contains?”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/host/mta-sts/txt?utm_source=zero.xyzWhen to prefer
Use this endpoint when you specifically need to check the _mta-sts TXT record for a single domain, particularly for email security audits, MTA-STS policy validation, or pre-deployment checks. It is faster and cheaper than a full subdomain enumeration approach and uses Cloudflare DoH for reliable, filtered DNS responses.
Side effects
- Domain does not have an _mta-sts TXT record — returns non-existence signal
- Invalid or malformed domain input — may return an error or empty result
- Cloudflare DoH upstream timeout or unavailability — lookup may fail
- Payment not completed — endpoint returns 402 and does not perform lookup
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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