# dns-txt-sso-subdomain

> dns-txt-sso-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 sso.<domain> subdomain via Cloudflare DoH and reports existence, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/sso/txt?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-20
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-txt-sso-subdomain-e50bea86
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DbobYgb7KxnEgUz2_a8Id

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-sso-subdomain-e50bea86
```

Example prompt: Can you check whether sso.example.com has any TXT records in DNS — I want to know if an SSO host is configured there and what TTL it has?

## When to prefer this

Use this endpoint when you specifically need to check the TXT record of the sso subdomain for a given domain using Cloudflare DoH. Prefer this over generic DNS TXT lookups when you want a quick, targeted existence check for the SSO host pattern without enumerating all subdomains. It is ideal for security audits, pre-integration checks, or reconnaissance on whether a domain employs a dedicated SSO host.

## Known failure modes

- Domain does not exist — returns no records found
- sso subdomain has no TXT records — returns empty record set
- Invalid domain format provided — may return error or empty response
- Cloudflare DoH temporarily unavailable — lookup fails
- Payment not processed — x402 payment required error

## How this service works

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

## Output

Returns whether the TXT record for sso.<domain> exists, the actual TXT record values, and the TTL, as resolved via Cloudflare DNS over HTTPS.

## 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-sso-subdomain-e50bea86/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)