# does-site-use-google-tag-manager

> does-site-use-google-tag-manager is a paid API for AI agents from site.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-18).

Detects whether a given website uses Google Tag Manager by fetching its homepage and fingerprinting HTML and response headers, returning a yes/no result with evidence.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/uses/google-tag-manager?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/does-site-use-google-tag-manager-d681417c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_DirnBvRI5t16GwucVnZvj

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 does-site-use-google-tag-manager-d681417c
```

Example prompt: Can you check whether example.com is using Google Tag Manager — I need to know before we start the migration planning?

## When to prefer this

Use this endpoint when you need a fast, low-cost ($0.01) single-domain check for Google Tag Manager specifically. It is ideal for sales intelligence workflows, pre-migration audits, or technographic profiling where you need a definitive yes/no with evidence rather than a full technology stack scan. For bulk checks across many domains, prefer the sibling bulk endpoint.

## Known failure modes

- Domain is unreachable or returns a non-200 status, resulting in an error or inconclusive result
- The website blocks crawlers or returns a bot-detection page, causing a false negative
- The site uses a server-side GTM setup not detectable from HTML or standard headers
- Rate limiting or network timeouts prevent the page from being fetched

## How this service works

Does a website use Google Tag Manager? Fetches the page (homepage for a bare domain) and matches Google Tag Manager's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (tag-manager). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

## Output

Returns a yes/no boolean indicating whether Google Tag Manager is detected on the site, an evidence snippet from the HTML or response headers that matched the GTM fingerprint, and the technology category label ('tag-manager').

## 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/does-site-use-google-tag-manager-d681417c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from site.intel.rallylive.ca](https://www.zero.xyz/host/site.intel.rallylive.ca/llms.txt)