# UltraDNS Hosting Detection

> UltraDNS Hosting Detection is a paid API for AI agents from dns.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-22).

Checks whether a domain's DNS is hosted by UltraDNS by looking up its NS records via Cloudflare DoH and matching them against UltraDNS nameserver patterns, returning a yes/no result with matched nameservers.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/hosted-by/ultradns?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-22
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ultradns-hosting-detection-19a531f7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap__x_cKwcY06yg4TO59fWxx

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 ultradns-hosting-detection-19a531f7
```

Example prompt: Can you check if example.com has its DNS hosted by UltraDNS — I want to know if it matches any UltraDNS nameserver patterns and which nameservers are being used?

## When to prefer this

Use this endpoint when you need to definitively identify whether a specific domain is DNS-hosted by UltraDNS, especially for sales intelligence, vendor migration planning, or security fingerprinting workflows. It is faster and cheaper than manual NS lookups and normalizes the pattern matching logic for UltraDNS nameserver variants.

## Known failure modes

- Domain does not exist or has no NS records — returns no match with empty nameserver list
- Cloudflare DoH lookup timeout or unavailability — request may fail or return error
- Invalid domain format provided — may return validation error
- Domain uses UltraDNS-like nameserver naming not in pattern set — false negative possible

## How this service works

Is the domain's DNS hosted by ultradns? Looks up the NS records (Cloudflare DoH) and matches them against ultradns's nameserver patterns, returning yes/no, the nameservers and which ones matched. Vendor detection for sales, migration and security work. $0.01 per lookup.

## Output

Returns a yes/no boolean indicating whether the domain's DNS is hosted by UltraDNS, the full list of NS records found via Cloudflare DoH, and a subset showing which specific nameservers matched UltraDNS patterns.

## 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/ultradns-hosting-detection-19a531f7/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)