# dns-cname-docs-subdomain

> dns-cname-docs-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 CNAME record for the docs subdomain of a given domain via Cloudflare DoH and reports whether it exists, its records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/docs/cname?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-cname-docs-subdomain-b27c7006
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ktrg9SExCtE2L8qeKmWsi

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-cname-docs-subdomain-b27c7006
```

Example prompt: Can you check if docs.github.com has a CNAME record configured — I want to know what it points to and what the TTL is?

## When to prefer this

Use this endpoint when you need a quick, reliable check on whether a specific domain has a docs subdomain configured as a CNAME, without enumerating all subdomains. It's ideal for DNS audits, pre-launch checks, or verifying third-party documentation hosting. Prefer this over general DNS tools when you specifically want CNAME data for the docs host via Cloudflare DoH with a known cost per lookup.

## Known failure modes

- No CNAME record found — docs subdomain may not exist or may use an A/AAAA record instead
- Invalid or malformed domain input results in a DNS query error
- Domain does not exist at all, returning NXDOMAIN
- Cloudflare DoH upstream timeout or service unavailability
- Rate limiting or payment failure returning 402

## How this service works

CNAME record of docs.<domain>: looks up the docs host under the domain you give (CNAME via Cloudflare DoH) and reports whether it exists, its records and TTL. Quick existence check for common hosts like docs without enumerating subdomains. $0.01 per lookup.

## Output

Returns whether a CNAME record exists for the docs subdomain of the queried domain, the record value(s) it points to, and the TTL. 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-cname-docs-subdomain-b27c7006/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)