# Does Site Use Three.js

> Does Site Use Three.js is a paid API for AI agents from site.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-02).

Checks whether a given website uses the Three.js JavaScript library by fetching its homepage and matching Three.js fingerprints in the HTML and response headers.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/uses/three-js?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-02
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/does-site-use-three-js-46090708
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HyaZwFq6oknz7oGh8eczh

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-three-js-46090708
```

Example prompt: Can you check if threejs.org uses Three.js on its homepage and show me the evidence that confirms it?

## When to prefer this

Choose this endpoint when you need a quick, low-cost ($0.01) single-technology check specifically for Three.js on a given domain. It is purpose-built for Three.js fingerprinting and is ideal for sales prospecting, competitor research, or migration audits where you need targeted yes/no confirmation with evidence rather than a full technology stack scan.

## Known failure modes

- Site is unreachable or times out — no detection result returned
- Site uses obfuscated or bundled Three.js that evades fingerprinting — false negative
- Domain input is malformed — request fails with input validation error
- Site blocks automated fetches (e.g. bot detection) — may return inconclusive result

## How this service works

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

## Output

Returns a yes/no answer indicating whether the site uses Three.js, along with an evidence snippet (HTML or header content that matched the fingerprint) and the technology category label ('library').

## 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-three-js-46090708/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)