# DNS TXT Record Lookup for autodiscover Subdomain

> DNS TXT Record Lookup for autodiscover 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 2026-10-21).

Looks up the TXT DNS record for the autodiscover.<domain> subdomain using Cloudflare DNS-over-HTTPS and returns whether it exists, its records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/autodiscover/txt?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-txt-record-lookup-for-autodiscover-subdomain-76f4bdcb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_xH3vppZmnHbEu6pFL66Nv

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability dns-txt-record-lookup-for-autodiscover-subdomain-76f4bdcb
```

Example prompt: Can you check whether autodiscover.contoso.com has any TXT DNS records — I want to know if the autodiscover subdomain exists and what its TTL is?

## When to prefer this

Use this endpoint when you need a fast, targeted check for the existence and content of the autodiscover TXT DNS record specifically — without enumerating all subdomains. Ideal for email infrastructure validation, Exchange/Office 365 autodiscover configuration checks, and domain reconnaissance tasks where you already know you want the autodiscover host. Prefer over general DNS enumeration tools when you only need this specific well-known hostname.

## Known failure modes

- NXDOMAIN response if autodiscover.<domain> does not exist as a DNS entry
- Empty records array if subdomain exists but has no TXT records
- Network timeout if Cloudflare DoH is temporarily unreachable
- Invalid domain input causing malformed query
- Payment failure if USDC balance insufficient for $0.01 per-call fee

## How this service works

TXT record of autodiscover.<domain>: looks up the autodiscover 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 autodiscover without enumerating subdomains. $0.01 per lookup.

## Output

Returns whether the autodiscover.<domain> TXT record exists, the actual TXT record content (if present), and the TTL value. Response includes the DNS response code (e.g. NOERROR, NXDOMAIN) indicating existence or absence of the subdomain.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {}
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/dns-txt-record-lookup-for-autodiscover-subdomain-76f4bdcb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from dns.intel.rallylive.ca](https://www.zero.xyz/host/dns.intel.rallylive.ca/llms.txt)