# Tech Stack Detector API - Wappalyzer Alternative (`kevinserver24/website-tech-stack-detector`) Actor

Detect a website's public technology stack from one URL. Returns JSON: url, detected\_technologies, cms, ecommerce\_platform, analytics\_provider, cdn\_provider, server\_header, framework, programming\_language, javascript\_libraries. Checks robots.txt before each request.

- **URL**: https://apify.com/kevinserver24/website-tech-stack-detector.md
- **Developed by:** [Kevin](https://apify.com/kevinserver24) (community)
- **Categories:** Developer tools, Lead generation, SEO tools
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

$13.00 / 1,000 site fingerprint verifieds

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.

Learn more: https://docs.apify.com/actors/running/actors-in-store.md#pay-per-event

## What's an Apify Actor?

Actors are web data automations that power AI and operations. They run on the Apify platform to scrape websites, process data, connect APIs, and automate workflows.
In Batch mode, an Actor accepts a well-defined JSON input, performs an action which can take anything from a few seconds to a few hours,
and optionally produces a well-defined JSON output, datasets with results, or files in key-value store.
In Standby mode, an Actor provides a web server which can be used as a website, API, or an MCP server.
Actors are written with capital "A".

## How to integrate an Actor?

If asked about integration, you help developers integrate Actors into their projects.
You adapt to their stack and deliver integrations that are safe, well-documented, and production-ready.
The best way to integrate Actors is as follows.

- **AI agents and MCP clients** — the [Apify MCP server](https://docs.apify.com/integrations/mcp.md) at `https://mcp.apify.com` (remote, streamable HTTP, OAuth on first use).
- **Agentic workflows and local Actor development** — [Agent Skills](https://apify.com/.well-known/agent-skills/index.json) with the [Apify CLI](https://docs.apify.com/cli/docs.md): `npm install -g apify-cli`, then `apify login`.
- **JavaScript/TypeScript projects** — the official [JS/TS client](https://docs.apify.com/api/client/js/docs.md): `npm install apify-client`.
- **Python projects** — the official [Python client](https://docs.apify.com/api/client/python/docs.md): `pip install apify-client`.
- **Any other language** — the [REST API](https://docs.apify.com/api/v2.md).

For usage examples, see the [API](#api) section below.

For more details, see Apify documentation as [Markdown index](https://docs.apify.com/llms.txt) and [Markdown full-text](https://docs.apify.com/llms-full.txt).

# README

## Website Tech Stack Detector

Unaffiliated, third-party Actor. Not affiliated with, endorsed by, or
sponsored by any CMS, platform or vendor it may detect.

Give it a list of URLs or bare hostnames; get back the technologies each
site's own homepage response reveals -- CMS, ecommerce platform, analytics
provider, CDN, JS framework, server-side language, and recognised JS
libraries. Sourced from a single ordinary GET per site: the same response
headers and HTML any visitor's browser receives, no login, no session, no
bot-check defeat.

Every request is checked against that site's own `robots.txt` first, live,
on every run. A site whose `robots.txt` disallows automated access to its
homepage is never fetched, and nothing is billed for it.

This Actor has no fixed target -- unlike most single-source lookups, the
site you're checking is whatever you give it. Coverage is honest and
partial: detection runs against a small, named set of signatures (currently
ten categories), not a comprehensive, continuously maintained ruleset. A
site that matches none of them returns nothing and is not billed -- that
does not mean the site has no discoverable technology, only that none of
this Actor's current signatures matched it.

# Actor input Schema

## `urls` (type: `array`):

One URL or bare hostname per line (or comma-separated), e.g. "https://example.com" or "example.com". Each site is checked against its own robots.txt first; a site whose robots.txt disallows automated access to its homepage is never fetched, and nothing is billed. A homepage that matches none of this Actor's technology signatures is also delivered free of charge.

## Actor input object example

```json
{
  "urls": [
    "wordpress.org",
    "example.com"
  ]
}
```

# Actor output Schema

## `results` (type: `string`):

No description

# API

You can run this Actor programmatically using our API. Below are code examples in JavaScript, Python, and CLI, as well as the OpenAPI specification and MCP server setup.

## JavaScript example

```javascript
import { ApifyClient } from 'apify-client';

// Initialize the ApifyClient with your Apify API token
// Replace the '<YOUR_API_TOKEN>' with your token
const client = new ApifyClient({
    token: '<YOUR_API_TOKEN>',
});

// Prepare Actor input
const input = {
    "urls": [
        "wordpress.org",
        "example.com"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("kevinserver24/website-tech-stack-detector").call(input);

// Fetch and print Actor results from the run's dataset (if any)
console.log('Results from dataset');
console.log(`💾 Check your data here: https://console.apify.com/storage/datasets/${run.defaultDatasetId}`);
const { items } = await client.dataset(run.defaultDatasetId).listItems();
items.forEach((item) => {
    console.dir(item);
});

// 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/js/docs

```

## Python example

```python
from apify_client import ApifyClient

# Initialize the ApifyClient with your Apify API token
# Replace '<YOUR_API_TOKEN>' with your token.
client = ApifyClient("<YOUR_API_TOKEN>")

# Prepare the Actor input
run_input = { "urls": [
        "wordpress.org",
        "example.com",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("kevinserver24/website-tech-stack-detector").call(run_input=run_input)

# Fetch and print Actor results from the run's dataset (if there are any)
print(f"💾 Check your data here: https://console.apify.com/storage/datasets/{run.default_dataset_id}")
for item in client.dataset(run.default_dataset_id).iterate_items():
    print(item)

# 📚 Want to learn more 📖? Go to → https://docs.apify.com/api/client/python/docs/quick-start

```

## CLI example

```bash
echo '{
  "urls": [
    "wordpress.org",
    "example.com"
  ]
}' |
apify call kevinserver24/website-tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,kevinserver24/website-tech-stack-detector"
        }
    }
}

```

The hosted server signs you in with OAuth on first connect, so no API token belongs in this config. Clients without OAuth support can send an `Authorization: Bearer <APIFY_API_TOKEN>` header instead, using a token from API & Integrations in Apify Console (https://console.apify.com/settings/integrations).

## OpenAPI specification

Download the OpenAPI definition: https://api.apify.com/v2/actors/YBpSdqBCiiqhTJK8U/builds/ploCGKIJZMizhZBOJ/openapi.json