# Tech Stack Detector (`bob-tools/tech-stack-detector`) Actor

Find out what any website runs on: CMS, site builder, ecommerce platform, analytics, ad pixels, payments, live chat, booking tools, CDN and JS frameworks. Filter lists of sites by technology.

- **URL**: https://apify.com/bob-tools/tech-stack-detector.md
- **Developed by:** [Valentyna Shtunder](https://apify.com/bob-tools) (community)
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

$3.00 / 1,000 website analyses

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?

An Actor is a serverless cloud program that runs on the Apify platform. It has two run modes.
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.

Apify vocabulary and the platform model are defined once, in the agent quickstart at https://apify.com/agents.md.

## 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.

Do not guess an integration path. Every one of them is in the agent quickstart at https://apify.com/agents.md: the Apify MCP server, Agent Skills with the Apify CLI, the JavaScript and Python clients, the REST API, and the account-free path for an agent with no human to sign in. It also carries the rule on stating cost before the first paid run.

For examples already wired to this Actor's own input schema, see the [API](#api) section below.

Each client library has reference documentation the quickstart does not restate: [JavaScript/TypeScript](https://docs.apify.com/api/client/js/docs.md) (`npm install apify-client`) and [Python](https://docs.apify.com/api/client/python/docs.md) (`pip install apify-client`).

# README

## Tech Stack Detector

Find out what any website runs on. Paste a list of URLs and get the **CMS, site builder, ecommerce platform, analytics, ad pixels, payment providers, live chat, booking tools, CDN and JS frameworks** for each one — plus WordPress version, theme and plugins.

Built for **agencies, SaaS sales teams and lead generation**: filter thousands of sites down to the ones running the platform you sell for.

### What it detects

| Category | Examples |
|---|---|
| CMS | WordPress, Drupal, Joomla, Ghost, TYPO3, HubSpot CMS |
| Site builders | Wix, Squarespace, Webflow, Tilda, Framer, Duda, GoDaddy, Carrd |
| Ecommerce | Shopify, WooCommerce, Magento, PrestaShop, BigCommerce, Ecwid |
| Analytics & pixels | GA4, Google Tag Manager, Meta Pixel, TikTok Pixel, Hotjar, Clarity, Matomo, Plausible |
| Ads | Google Ads, AdSense, Criteo, Taboola |
| Payments | Stripe, PayPal, Klarna, Square, Adyen, Mollie |
| Live chat | Intercom, Tawk.to, Crisp, Tidio, LiveChat, Zendesk, Drift, JivoChat, ManyChat |
| Email marketing | Mailchimp, Klaviyo, HubSpot, ActiveCampaign, Omnisend, Brevo |
| Booking | Calendly, Fresha, Booksy, OpenTable, Acuity, SimplyBook |
| Frameworks | React, Next.js, Vue, Nuxt, Angular, jQuery, Bootstrap, Tailwind, Elementor |
| CDN & hosting | Cloudflare, CloudFront, Fastly, Vercel, Netlify, Akamai, Nginx, Apache, WP Engine, Kinsta |

WordPress sites also return `wordpressVersion`, `wordpressTheme` and `wordpressPlugins`.

### Filter by technology

Fill in **Only return sites using these technologies** (e.g. `Shopify`, `WordPress`) and the Actor returns only matching sites. Skipped sites are **not charged** — a cheap way to qualify a large list.

### Typical use cases

- Find every Shopify store in a list and pitch an app or a migration
- Find WordPress sites with outdated versions for maintenance offers
- Check which prospects already use a live chat, a pixel or a booking tool — and which don't
- Competitor and market research: what the market in your niche actually runs on
- Enrich a CRM with platform data before outreach

### Pricing

You pay **per website analyzed**. Unreachable sites, bot-protected sites and sites filtered out by technology are returned **for free**.

### Notes

- Only the homepage and publicly available data are analyzed; detection is based on public markers in HTML and HTTP headers.
- Some technologies are loaded after page render and may not appear.
- Pair it with **Google Maps Scraper** to build a list of sites first.

# Actor input Schema

## `startUrls` (type: `array`):

Websites to analyze — one per line. 'https://' is optional.

## `filterTechnologies` (type: `array`):

Example: WordPress, Shopify, Wix. Sites without any of them are skipped and not charged.

## `maxConcurrency` (type: `integer`):

How many websites to analyze in parallel.

## Actor input object example

```json
{
  "startUrls": [
    "https://apify.com",
    "https://crawlee.dev"
  ],
  "maxConcurrency": 8
}
```

# Actor output Schema

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

One record per website with all detected technologies.

# 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 = {
    "startUrls": [
        "https://apify.com",
        "https://crawlee.dev"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("bob-tools/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 = { "startUrls": [
        "https://apify.com",
        "https://crawlee.dev",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("bob-tools/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 '{
  "startUrls": [
    "https://apify.com",
    "https://crawlee.dev"
  ]
}' |
apify call bob-tools/tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,bob-tools/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/EI1oMye6DiOOh4pxe/builds/8mNF0GneJPt8SDObC/openapi.json