# Tech Stack Detector (Website Technology Lookup) (`pagecraft/tech-stack-detector`) Actor

Find what any website is built with: CMS, framework, hosting, CDN, analytics, ads, payments, chat, email provider and more (3,600+ technologies). Bulk domain lists, fast HTTP, no browser. Low price per site.

- **URL**: https://apify.com/pagecraft/tech-stack-detector.md
- **Developed by:** [Pagecraft Tools](https://apify.com/pagecraft) (community)
- **Features:** Limited permissions
- **Stats:** 2 total users, 1 monthly users, 100.0% runs succeeded, 0 bookmarks
- **User rating**: No ratings yet

## Pricing

from $3.00 / 1,000 website scanneds

This Actor is paid per event. You are not charged for the Apify platform usage, but only a fixed price for specific events.
Since this Actor supports Apify Store discounts, the price gets lower the higher subscription plan you have.

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: What Is Any Website Built With?

Find out **which technologies any website uses**, in bulk and at a fraction of the usual price. Detects **3,600+ technologies**: CMS, ecommerce platforms, analytics, tag managers, marketing automation, CRM, payments, live chat, A/B testing, CDN, hosting, frameworks and more, with versions where visible.

### Quick start

1. Press **Try for free**. The form opens with a working example (`apify.com`, `stripe.com` and more).
2. Replace it with your own domains or URLs.
3. Press **Start**. Results appear as they are found; download them as Excel, CSV or JSON, or use the API.

A result looks like this (some columns):

| domain | technologyCount | emailProvider |
| --- | --- | --- |
| acme.com | 3 | Google Workspace |

It also reads public **DNS records** to show what most tech lookups miss: the company's **email provider** (Google Workspace, Microsoft 365...), **email sending tools** (HubSpot, Mailchimp, SendGrid, Salesforce...) and **business tools verified on the domain** (Atlassian, Stripe, Zoom, Slack, OpenAI and more).

Ideal for **sales prospecting** (find every Shopify store or HubSpot customer in a list), **lead scoring**, **competitor research**, **market sizing** and **AI agents**.

### Why this tool?

- 💸 **Low price, pay per website.** Failed and blocked websites cost only a tiny flat fee ($0.0015 each).
- ⚡ **Fast.** No browser needed, so large lists finish in minutes.
- 📬 **DNS signals included.** Email provider and verified business tools, not just what's on the page.
- 🧹 **Easy input.** Domains, URLs or email addresses; duplicates removed.
- 🤖 **Works with AI agents** through the Apify MCP server, and with Make, n8n and Zapier.

### Input example

```json
{ "domains": ["shopify.com", "notion.so", "bbc.co.uk"], "includeDnsSignals": true }
```

### Output example (shortened)

```json
{
  "domain": "acme.com",
  "technologyCount": 3,
  "technologies": [
    { "name": "WordPress", "version": "6.4.2", "categories": ["CMS", "Blogs"], "confidence": 100, "website": "https://wordpress.org" },
    { "name": "Google Analytics", "version": null, "categories": ["Analytics"], "confidence": 100, "website": "http://google.com/analytics" },
    { "name": "Stripe", "version": null, "categories": ["Payment processors"], "confidence": 100, "website": "http://stripe.com" }
  ],
  "technologiesByCategory": { "CMS": ["WordPress"], "Analytics": ["Google Analytics"], "Payment processors": ["Stripe"] },
  "emailProvider": "Google Workspace",
  "emailSendingServices": ["HubSpot"],
  "verifiedServices": ["Atlassian", "Google Search Console"]
}
```

Need company names, logos, social profiles and contacts as well? Try our **Website Intelligence** tool.

### Pricing

Pay per website scanned. See the **Pricing** tab for your plan's rate. Websites that fail or block us cost a flat $0.0015 each ($1.50 per 1,000), because they still use server time. Set **Maximum cost per run** to cap your spend.

| Event | When it is charged | Price per 1,000 (Free / Bronze / Silver / Gold plan) |
| --- | --- | --- |
| Website scanned | Each website scanned and returned. | $5 / $4 / $3.50 / $3 |
| Website failed | A website that could not be reached or blocked us (it still uses server time). | $1.50 on every plan |

Need more speed? Give the run more memory: it scans 4 websites at once per GB. Residential proxies are not supported.

### Notes

Detection uses the page's HTML, headers, scripts, cookies, robots.txt, TLS certificate and DNS records, without a browser. Technologies that only load after JavaScript runs may be missed. Fingerprints are based on the MIT-licensed Wappalyzer 6.10.54 release, extended with our own.

### Feedback

Missing a technology? Open an issue on the **Issues** tab with the domain and the technology, and we'll add it.

### Use with AI agents (MCP)

Connect this tool to Claude, Cursor, VS Code or any other MCP client through the [Apify MCP server](https://mcp.apify.com/). To load only this tool, use this server URL:

```
https://mcp.apify.com?tools=pagecraft/tech-stack-detector
```

Then ask, for example: "Find out which ecommerce platform, analytics and payment tools these 50 websites use". The agent gets back the technologies found on each website, grouped by category. Each call is charged per event at the prices in Pricing above. Agents without an Apify account can also pay per run through [Apify's agentic payments](https://docs.apify.com/agents/payments).

### Workflows with other Pagecraft tools

Pagecraft tools are built to work together. Ideas that use this one:

**Build a B2B lead list.** From a list of company websites to contacts and company facts.

1. [Website Contact Extractor](https://apify.com/pagecraft/website-contact-extractor): Paste the company websites to get their emails, phone numbers and social profiles.
2. [Company Data Enrichment from Domain](https://apify.com/pagecraft/website-intelligence): Add company details for the same domains: name, description, location and links.
3. **This tool**: See which tools each company runs (CMS, analytics, ecommerce), to tailor your pitch.

**Research a competitor.** See how a competitor markets, sells and has changed over time.

1. [Google Ads Transparency Scraper](https://apify.com/pagecraft/google-ads-transparency-scraper): The ads they run on Google, with formats and dates.
2. [Shopify Store Products Scraper](https://apify.com/pagecraft/shopify-products-scraper): Their product catalogue, prices and stock, if they sell on Shopify.
3. **This tool**: The technology behind their website.
4. [Wayback Machine Scraper](https://apify.com/pagecraft/wayback-machine-snapshots): How their website has changed, from archived copies.
5. [Logo & Brand Colours Extractor](https://apify.com/pagecraft/brand-kit-extractor): Their logo, brand colours and fonts.

### More Pagecraft tools

- [Shopify Store Products Scraper](https://apify.com/pagecraft/shopify-products-scraper): every product, price and variant from any Shopify store this tool finds.
- [Company Data Enrichment from Domain (Contacts, Tech Stack)](https://apify.com/pagecraft/website-intelligence): logo, contacts and tech stack for a list of company websites.
- [Logo & Brand Colours Extractor (Favicon, Fonts, Brand Kit)](https://apify.com/pagecraft/brand-kit-extractor): any company's logo and brand colours from its domain.
- [WHOIS Lookup (Bulk Domain Age, Expiry & Registrar)](https://apify.com/pagecraft/domain-whois-lookup): domain age, expiry date and registrar in bulk.

# Actor input Schema

## `domains` (type: `array`):

Company domains (acme.com), URLs, or even email addresses (the domain is used). One per line; duplicates are removed.

## `includeDnsSignals` (type: `boolean`):

Also read public DNS records to find the email provider, email sending tools and business tools the company has verified (Google Workspace, Microsoft 365, HubSpot, Atlassian, Stripe and more).

## `timeoutSecs` (type: `integer`):

Give up on a website after this long.

## `maxRetries` (type: `integer`):

Retry a website once if it fails quickly (for example blocked, then retried through a new proxy IP). Slow failures are not retried.

## `proxyConfiguration` (type: `object`):

Optional. Use Apify datacenter proxies or your own proxies for websites that block automated requests.

## Actor input object example

```json
{
  "domains": [
    "apify.com",
    "stripe.com",
    "bbc.co.uk"
  ],
  "includeDnsSignals": true,
  "timeoutSecs": 30,
  "maxRetries": 1
}
```

# 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 = {
    "domains": [
        "apify.com",
        "stripe.com",
        "bbc.co.uk"
    ]
};

// Run the Actor and wait for it to finish
const run = await client.actor("pagecraft/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 = { "domains": [
        "apify.com",
        "stripe.com",
        "bbc.co.uk",
    ] }

# Run the Actor and wait for it to finish
run = client.actor("pagecraft/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 '{
  "domains": [
    "apify.com",
    "stripe.com",
    "bbc.co.uk"
  ]
}' |
apify call pagecraft/tech-stack-detector --silent --output-dataset

```

## MCP server setup

```json
{
    "mcpServers": {
        "apify": {
            "type": "http",
            "url": "https://mcp.apify.com/?tools=fetch-actor-details,pagecraft/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/qtYqoPaYuGzc4j2Pz/builds/Y0zCnCoLooixOM8pt/openapi.json