Website Tech Stack Detector

Find out what any website is built with. The actor reads response headers and HTML to identify the CMS, e-commerce platform, JavaScript framework, analytics, chat widgets, payments, CDN, hosting and security headers, with versions where visible. Useful for lead qualification, agency prospecting and competitor research.

What does Website Tech Stack Detector do?

• More than 100 technology signatures across 15 categories
• Versions for WordPress, Drupal, jQuery, Angular and Bootstrap when exposed
• Evidence for every detection: header, HTML, cookie or meta tag
• Security headers check and JavaScript-rendered-page hint

How to use it

1. Click Try for free and open the Input tab.
2. Fill in the fields below, or keep the defaults for a quick test.
3. Press Start. Results appear in the Output tab within seconds to a few minutes.
4. Download as JSON, CSV or Excel, or call the actor from the API, a schedule, Make, Zapier or an AI agent through the Apify MCP server.

Input

Field	Type	Description
websites	array	Domains or URLs, one per line.
maxWebsites	integer	Cap per run.

Example input

{
  "websites": [
    "shopify.com",
    "wordpress.org",
    "vercel.com"
  ],
  "maxWebsites": 500
}

Output

Each result is a flat JSON object that you can open in the Output tab, export to CSV or Excel, or read through the API. See the dataset views for the main columns.

How much does it cost to use Website Tech Stack Detector?

Pricing is pay per event: $0.002 per website. You pay only for results saved to the dataset, plus nothing extra for platform usage on the free plan limits. Apify's free monthly credit lets you test it before paying.

FAQ

Does it run JavaScript? No. It reads the server response, so tech injected only after JavaScript runs may be missed. The likelyJsRendered flag warns you.

Is detection guaranteed? No. It is signature-based and can miss custom or obfuscated stacks.

Can it fetch thousands of sites? Yes. It runs eight requests in parallel.

Is it legal?

The actor reads public, open-licence or government data only and does not collect private information. You are responsible for using the results in line with the source's terms and applicable laws.

Use it with AI agents (MCP)

This actor is agent-ready: it is a plain tool with a documented JSON input and a flat JSON output, so Claude, ChatGPT, Cursor and other agents can call it through the Apify MCP server.

Add it to an MCP client with this URL (Apify account or agentic payment required):

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

Example prompt: "Use the Website Tech Stack Detector tool with the example input below and summarise the results."

Calls are pay per event ($0.002 per website), so an agent can estimate the cost before it runs. Empty or failed lookups return a status record instead of failing the run.

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Feedback

Found a bug or need another field or city? Open an issue on the actor's Issues tab and it will be looked at quickly.