# Tech Stack Detector — Wappalyzer & BuiltWith API Alternative

A developer tools tool your agent can run on one prepaid apifare key. Page: https://apifare.com/tools/nexgendata/wappalyzer-replacement

## What you need

An apifare key with credits (sign up: POST https://apifare.com/v1/signup {"email": "..."}; new accounts get 500 free credits). No other account or key.

## Inputs

- `urls` (string): URLs to analyze (e.g. ["https://stripe.com","https://shopify.com"])
- `categories_filter` (array): Filter by technology categories
- `include_confidence` (boolean): Include confidence scores
- `include_versions` (boolean): Extract version numbers
- `timeout_seconds` (integer): HTTP timeout (seconds) (e.g. 15)
- `startUrls` (array): Start URLs (alias)

The most relevant fields; the search result's input_schema lists all of them.

## Price

5 credits reserved per run, settled to the run's true cost, never more than 20 credits (1 credit = $0.01). Failed runs are refunded. Exact numbers: https://apifare.com/capabilities

## Run it

1. Find it: MCP search_apis, or GET https://apifare.com/v1/search?q=Tech%20Stack%20Detector%20%E2%80%94%20Wappalyzer%20%26%20BuiltWith%20API%20Alternative with Authorization: Bearer <token>. Take the result named "Tech Stack Detector — Wappalyzer & BuiltWith API Alternative"; it carries a proxy_route.
2. Run it: MCP proxy_call with that proxy_route and the input JSON (apifare-mcp over stdio), or POST the proxy_route over HTTP with the input JSON as the body and the same Authorization header.
3. On HTTP 402, relay the body's human_readable field to your human verbatim, wait, then retry the same call. Every other error and its fix: https://apifare.com/errors.md