# dns-a-docs-subdomain

> dns-a-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 2026-10-19).

Looks up the A record for docs.<domain> via Cloudflare DNS-over-HTTPS and reports whether the host exists, its IP addresses, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/docs/a?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-19
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/dns-a-docs-subdomain-37c7500b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_SD8RKlw4JUgvjPdj25HCh

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-docs-subdomain-37c7500b
```

Example prompt: Can you check if docs.stripe.com exists and what IP address it resolves to?

## When to prefer this

Use this endpoint when you specifically need the IPv4 A record for the docs subdomain of a given domain, such as verifying a documentation site is live, checking hosting infrastructure, or enriching domain intelligence data. Prefer this over full subdomain enumeration tools when you only need the quick existence check for docs.<domain> specifically.

## Known failure modes

- Domain does not have a docs subdomain — returns no records found
- Invalid or malformed domain input — lookup may fail or return error
- Cloudflare DoH upstream timeout or outage — temporary lookup failure
- Domain exists but docs subdomain is only configured as CNAME (not A) — no A record returned

## How this service works

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

## Output

Returns whether the docs.<domain> host exists as a DNS A record, its resolved IPv4 address(es), and the TTL of the record. If the host does not exist, indicates absence of the record.

## 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-docs-subdomain-37c7500b/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)