# does-site-use-auth0

> does-site-use-auth0 is a paid API for AI agents from site.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).

Detects whether a website uses Auth0 by fingerprinting its homepage HTML and response headers, returning a yes/no result with supporting evidence.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/uses/auth0?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-11
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/does-site-use-auth0-5b1c11d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_cGTIvutH0eCTzmHRM3rka

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-auth0-5b1c11d9
```

Example prompt: Can you check if stripe.com uses Auth0 for authentication? I want to know if they rely on it and see what evidence was found on their homepage.

## When to prefer this

Use this endpoint when you need a fast, cheap ($0.01) single-domain check to determine Auth0 usage for sales prospecting, competitor research, or migration planning. It is purpose-built for Auth0 specifically, so prefer it over generic tech-stack detectors when you only care about Auth0. For bulk checks across many domains, use the corresponding bulk sibling endpoint instead.

## Known failure modes

- Domain does not resolve or is unreachable — fetch fails with no result
- Site blocks automated requests (bot protection) — may return false negative
- Auth0 loaded client-side via JavaScript after page load — not detectable via static HTML fetch
- Server-side Auth0 usage with no frontend fingerprints — false negative
- Invalid or malformed domain input — error response
- Rate limiting by target server — incomplete fetch

## How this service works

Does a website use Auth0? Fetches the page (homepage for a bare domain) and matches Auth0's fingerprints in the HTML and response headers, returning yes/no with the evidence snippet and the category (auth). Technographics for sales, competitor research and migration planning, one technology per call. $0.01 per check.

## Output

Returns a yes/no boolean indicating whether Auth0 was detected on the site, along with an evidence snippet from the HTML or response headers that triggered the match, and the technology category label ('auth').

## 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-auth0-5b1c11d9/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)