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DNS TXT Record Lookup for _acme-challenge Subdomain
x402
DNS TXT Record Lookup for _acme-challenge 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 _acme-challenge subdomain of a given domain via Cloudflare DoH and reports existence, records, and TTL
Price / call$0.01
Success—
StatusUnknown
How this service works
TXT record of _acme-challenge.<domain>: looks up the _acme-challenge 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 _acme-challenge without enumerating subdomains. $0.01 per lookup.
Output
Returns whether the _acme-challenge TXT record exists under the given domain, the full TXT record value(s) if present, and the TTL of the record, as resolved via Cloudflare DNS over HTTPS.
Example use cases
Verify Let's Encrypt DNS challenge record
“Before I trigger certificate issuance, can you check whether the _acme-challenge TXT record is already present and what it says for mydomain.com?”
Debug failed ACME DNS-01 validation
“My Let's Encrypt cert renewal failed — can you check if the _acme-challenge TXT record for acmecorp.io actually exists and what TTL it has?”
Automate pre-cert-issuance DNS readiness check
“I'm about to issue a wildcard certificate for startupsite.dev — can you confirm the _acme-challenge subdomain has a TXT record set and report back the value?”
Technical details
Endpoint
GEThttps://dns.intel.rallylive.ca/dns/host/acme-challenge/txt?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, targeted existence check for the _acme-challenge TXT record specifically — ideal for pre-flight checks before ACME DNS-01 certificate issuance or renewal, or for monitoring whether a challenge record has been set. Prefer this over full subdomain enumeration tools when you only need to confirm the presence of this single well-known host.
Side effects
- Record does not exist — returns existence flag as false with no record data
- Domain not found or invalid — may return DNS NXDOMAIN or empty response
- Cloudflare DoH service unavailable — upstream timeout or error
- Malformed domain input — request may fail or return unexpected results
- TTL of 0 or very low — record may have just been set and not yet propagated globally
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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