# DNS A Record Lookup for SSO Subdomain

> DNS A Record Lookup for 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 DNS A record for the sso.<domain> subdomain via Cloudflare DoH and reports existence, IP records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/sso/a?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-a-record-lookup-for-sso-subdomain-31cef817
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_s-pvGx1_0G_WEqGl6GI_p

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-a-record-lookup-for-sso-subdomain-31cef817
```

Example prompt: Can you check whether acme.com has an SSO subdomain configured — specifically look up the DNS A record for sso.acme.com and tell me if it exists, what IP it points to, and the TTL?

## When to prefer this

Use this endpoint when you need a fast, targeted existence check for the sso subdomain of a specific domain without full subdomain enumeration. Ideal for pre-integration checks, security reconnaissance, or verifying enterprise SSO infrastructure. Prefer this over generic DNS tools when you specifically need the sso host A record and want a paid, reliable, Cloudflare-backed result.

## Known failure modes

- Domain does not exist — NXDOMAIN returned, no records
- sso subdomain not configured — empty answer section
- Network or DoH resolver timeout
- Invalid or malformed domain input
- SERVFAIL from upstream DNS

## How this service works

A record of sso.<domain>: looks up the sso host under the domain you give (A 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 sso.<domain> A record exists, the resolved IP address(es), and the TTL value from Cloudflare's DNS over HTTPS resolver. If the record does not exist, reports absence.

## 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-a-record-lookup-for-sso-subdomain-31cef817/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)