# does-site-use-posthog

> does-site-use-posthog 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).

Checks whether a given website uses PostHog analytics by scanning its homepage HTML and response headers for PostHog fingerprints, returning yes/no with evidence.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/uses/posthog?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-posthog-70606b7b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_pzt4Aigx4yIko5VggiuWs

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-posthog-70606b7b
```

Example prompt: Can you check if linear.app uses PostHog analytics — I want to know if they've adopted it before I pitch them a migration to a competing tool?

## When to prefer this

Use this endpoint when you need a lightweight, single-domain check specifically for PostHog technology presence — ideal for sales prospecting, competitive technographic research, or verifying PostHog deployment before or after a migration. Prefer the bulk sibling endpoint if checking more than one domain at a time.

## Known failure modes

- Domain is unreachable or returns non-200 status — endpoint may return no-match or an error
- Website uses server-side rendering or heavy JS obfuscation that hides PostHog initialization from static HTML scan
- PostHog loaded via a custom proxy or renamed bundle may evade fingerprint matching
- Rate limits or bot protection on the target site may block the fetch
- Bare domain redirects to a subdomain that isn't scanned

## How this service works

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

## Output

Returns a yes/no answer indicating whether PostHog is detected on the site, along with an evidence snippet (matching HTML or header content that triggered the fingerprint match) and a technology category label ('analytics').

## 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-posthog-70606b7b/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)