# Website Tech Stack Detector (`rationalistic_counsel/website-tech-stack-detector`) Actor

Detect the technology stack behind any website. Enter one or more URLs and get the CMS, frameworks, libraries, analytics, advertising, CDN and hosting technologies in use, with category, version and detection confidence for each. No API key needed.

- **URL**: https://apify.com/rationalistic_counsel/website-tech-stack-detector.md
- **Developed by:** [J N](https://apify.com/rationalistic_counsel) (community)
- **Categories:** Developer tools
- **Features:** Limited permissions
- **Stats:** 5 total users, 0 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $0.01 / 1,000 results

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

## Website Tech Stack Detector

Detect the full technology stack of any website — frameworks, CMS, CDN, analytics, payment processors, hosting platforms, and 80+ more technologies. No API key needed.

### What it detects

| Category | Examples |
|----------|----------|
| **JavaScript Frameworks** | React, Vue.js, Angular, Svelte, Alpine.js, HTMX, jQuery |
| **CSS Frameworks** | Bootstrap, Tailwind CSS, Bulma, Foundation |
| **CMS** | WordPress, Drupal, Joomla, Ghost, Wix, Squarespace, Webflow |
| **E-commerce** | Shopify, WooCommerce, Magento, BigCommerce |
| **Static Site Generators** | Next.js, Nuxt.js, Gatsby, Hugo, Jekyll, Astro |
| **CDN** | Cloudflare, Fastly, Amazon CloudFront, Akamai |
| **Hosting / Platform** | Vercel, Netlify, Heroku, Fly.io, Render |
| **Web Servers** | Nginx, Apache, LiteSpeed, Caddy, Microsoft IIS |
| **Analytics** | Google Analytics, Mixpanel, Segment, Amplitude, Plausible, Matomo |
| **Tag Managers** | Google Tag Manager |
| **Customer Support** | Intercom, Zendesk, Drift, Crisp, LiveChat, Tawk.to |
| **Payment** | Stripe, PayPal |
| **Marketing** | HubSpot, Mailchimp |
| **Error Tracking** | Sentry, Datadog, New Relic |
| **A/B Testing** | Optimizely, Google Optimize, LaunchDarkly |
| **Maps** | Google Maps, Mapbox |
| **Fonts** | Google Fonts, Adobe Fonts |
| **Icon Libraries** | Font Awesome |
| **Security** | Sucuri |
| **Programming Languages** | PHP, Java, ASP.NET |

### How it works

The actor analyzes multiple signals to identify technologies:

1. **HTTP Headers** — `Server`, `X-Powered-By`, CDN headers, platform-specific headers
2. **HTML Content** — Meta generator tags, framework-specific DOM markers, class patterns
3. **Script Sources** — JavaScript library CDN URLs, inline script patterns
4. **CSS References** — Framework stylesheet URLs
5. **Cookies** — Session cookie names that reveal server-side technology

Each detection includes a **confidence level** (high or medium) and the **source** of detection.

### Output format

Each result includes:

- `url` — The analyzed URL
- `technologyCount` — Total technologies found
- `technologies` — Array of detected technologies, each with:
  - `name` — Technology name (e.g., "React")
  - `category` — Category (e.g., "JavaScript Framework")
  - `version` — Version if detected (e.g., "18.2.0")
  - `confidence` — Detection confidence ("high" or "medium")
  - `source` — How it was detected (e.g., "script src", "HTTP header")
- `categories` — Technologies grouped by category
- `summary` — Quick highlights

### Use cases

- **Sales & Lead Enrichment** — Know what tech your prospects use before you pitch
- **Competitive Intelligence** — Understand competitors' technology choices
- **Market Research** — Analyze technology adoption across industries
- **Security Audits** — Identify outdated or vulnerable technologies
- **Web Development** — Reverse-engineer tech stacks for migration planning
- **SEO Analysis** — Identify CMS and analytics tools on any site

### FAQ

**Q: Do I need an API key?**
A: No. The actor works with any public website. Just enter a URL.

**Q: How many URLs can I analyze at once?**
A: Up to 100 URLs per run.

**Q: Does it detect version numbers?**
A: Yes, when available. Version detection works for many JavaScript libraries and frameworks loaded via CDN.

**Q: What's the difference between "high" and "medium" confidence?**
A: "High" means the technology was identified by a definitive marker (specific header, CDN URL). "Medium" means it was found via pattern matching in HTML or inline scripts, which may occasionally produce false positives.

**Q: Is this legal?**
A: Yes. The actor only reads publicly available HTTP headers and HTML content — the same information your browser sees when visiting a website.

**Q: How does this compare to Wappalyzer or BuiltWith?**
A: Similar concept, but pay-per-use pricing instead of monthly subscriptions. Ideal for one-off checks or integration into automated workflows.

**Q: Can it detect server-side technologies?**
A: Partially. Server-side tech is detected when it reveals itself through HTTP headers (e.g., `X-Powered-By: PHP`) or cookies (e.g., `PHPSESSID`). Technologies that don't expose any client-side signals cannot be detected.

**Q: Does it work with JavaScript-heavy single-page apps?**
A: Yes. It detects React, Vue, Angular, and Svelte through their DOM markers, even on SPAs. However, it uses static HTML analysis — it does not execute JavaScript.

# Actor input Schema

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

One or more website URLs to analyze. Enter the homepage URL (e.g., https://example.com). The actor detects technologies from HTTP headers, HTML content, scripts, and cookies.

## `timeout` (type: `integer`):

HTTP request timeout per URL in seconds.

## Actor input object example

```json
{
  "urls": [
    "https://github.com",
    "https://stripe.com"
  ],
  "timeout": 30
}
```

# Actor output Schema

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

Technology stack detection results for each URL

# 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": [
        "https://github.com",
        "https://stripe.com"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("rationalistic_counsel/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": [
        "https://github.com",
        "https://stripe.com",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("rationalistic_counsel/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": [
    "https://github.com",
    "https://stripe.com"
  ]
}' |
apify call rationalistic_counsel/website-tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,rationalistic_counsel/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/9mkbhGePTDxuuYQbn/builds/bvaUEBwKu1Wel1S7f/openapi.json