# does-site-use-launchdarkly

> does-site-use-launchdarkly is a paid API for AI agents from site.intel.rallylive.ca, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-15).

Checks whether a given website uses LaunchDarkly feature flagging by scanning its HTML and response headers for LaunchDarkly fingerprints, returning a yes/no result with evidence.

## Facts

- Endpoint: GET https://site.intel.rallylive.ca/site/uses/launchdarkly?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/does-site-use-launchdarkly-f809535e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_oxy5Ch3iBHFWLPeQqRP3J

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-launchdarkly-f809535e
```

Example prompt: Can you check if acme.com uses LaunchDarkly for feature flags? I want to know if they're already a LaunchDarkly customer before I reach out.

## When to prefer this

Use this endpoint when you need a fast, single-domain check specifically for LaunchDarkly presence — ideal for sales qualification, competitor research, or migration audits. Prefer this over general tech-stack scrapers when you only care about feature flagging tools and want low-cost ($0.01) per-domain results. For broader technology detection across multiple categories, consider combining with sibling endpoints.

## Known failure modes

- Target website is unreachable or returns an error — check will fail to return a definitive result
- LaunchDarkly loaded via a tag manager or delayed script injection may not be detected on initial HTML load
- False negative if LaunchDarkly is only used on authenticated pages not accessible to the crawler
- False positive risk is low but possible if another tool mimics LaunchDarkly's fingerprint patterns
- Rate limiting or bot-blocking by the target site may prevent the page fetch

## How this service works

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

## Output

Returns a yes/no boolean indicating LaunchDarkly presence, an evidence snippet showing the matched fingerprint (HTML or header content), and the technology category label ('feature-flags').

## 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-launchdarkly-f809535e/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)