# Is DNS Hosted by Tucows

> Is DNS Hosted by Tucows 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 Tucows by looking up its NS records via Cloudflare DoH and matching them against Tucows nameserver patterns, returning a yes/no answer with matched nameservers.

## Facts

- Endpoint: GET https://dns.intel.rallylive.ca/dns/hosted-by/tucows?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/is-dns-hosted-by-tucows-0e99314a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ztaOM2dhxP-IVM5QhESIh

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 is-dns-hosted-by-tucows-0e99314a
```

Example prompt: Can you check if example.com has its DNS hosted by Tucows — give me the nameservers and whether any of them match Tucows's patterns?

## When to prefer this

Choose this endpoint when you specifically need to detect whether a domain's DNS is managed by Tucows (the registrar/DNS host), such as for sales prospecting, pre-migration audits, or security investigations targeting Tucows-hosted infrastructure. It is more precise than a generic NS lookup because it applies Tucows-specific pattern matching on top of the raw NS records.

## Known failure modes

- Invalid or non-existent domain returns an error or empty NS records
- Domain with no NS records returns a 'no' result with empty matches
- DNS lookup timeout from Cloudflare DoH results in a lookup failure
- Malformed domain input may return a validation error
- Tucows nameserver pattern list may lag behind actual Tucows infrastructure changes, causing false negatives

## How this service works

Is the domain's DNS hosted by tucows? Looks up the NS records (Cloudflare DoH) and matches them against tucows'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 Tucows, the full list of NS records retrieved via Cloudflare DoH, and which specific nameservers matched Tucows's known nameserver 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/is-dns-hosted-by-tucows-0e99314a/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)