# DNS A Record Lookup for ci Subdomain via Cloudflare DoH

> DNS A Record Lookup for ci Subdomain via Cloudflare DoH 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 A (IPv4) record for the ci.<domain> subdomain using Cloudflare DNS over HTTPS and returns existence status, records, and TTL.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/host/ci/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-ci-subdomain-via-cloudflare-doh-ab50f938
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_h1O7bgxcWicbnkIMPbACw

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-ci-subdomain-via-cloudflare-doh-ab50f938
```

Example prompt: Can you check if ci.github.com has an A record — does that subdomain actually resolve to an IP, and what's its TTL?

## When to prefer this

Use this endpoint when you need a quick, focused existence check for the ci subdomain of a specific domain without enumerating all subdomains. Prefer it over generic DNS tools when you specifically want Cloudflare DoH resolution for the ci host and need TTL data alongside the IP. It is ideal for DevOps agents verifying CI infrastructure presence or reconnaissance workflows targeting common known hostnames.

## Known failure modes

- Domain does not exist — returns NXDOMAIN response code with no records
- ci subdomain not configured — NXDOMAIN with empty record set
- Invalid domain input — may return error or empty response
- Network/DoH resolver timeout — request fails with no data
- Malformed domain string — request may return error response

## How this service works

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

## Output

Returns whether the ci.<domain> A record exists, the resolved IPv4 address(es), the TTL in seconds, and the DNS response code (e.g. NOERROR or NXDOMAIN), as answered by 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-a-record-lookup-for-ci-subdomain-via-cloudflare-doh-ab50f938/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)