Tech Stack Detector MCP server

MCP Factory: pay-per-use MCP tools for AI agents

MCP Factory builds small, reliable, pay-per-use tools that AI agents can call over the Model Context Protocol (MCP). Each tool runs as an Apify Actor and is exposed through Apify's hosted MCP server — no installation, no infrastructure, no subscription. Your agent calls the tool directly; usage bills through your Apify account at flat, transparent per-result prices.

The tools

🔍 Tech Stack Detector

Find out what any website is built with. Scans a list of URLs and identifies the technologies behind each site — CMS, ecommerce platform, web frameworks, analytics, CDN, web server, and more — using the open-source webappanalyzer fingerprint dataset (7,500+ technologies across 109 categories). A fast, affordable Wappalyzer / BuiltWith alternative at roughly $5 per 1,000 sites.

• MCP server URL: https://mcp.apify.com?tools=apifmcpfactory/tech-stack-detector
• Apify Store: apify.com/apifmcpfactory/tech-stack-detector
• Try an example task: run it with sample input
• Details: tech-stack-detector/

🧾 EU VAT Validator

Validate EU VAT numbers in bulk against VIES, the European Commission's official VAT validation service — and get the official consultation number on every check as audit evidence for tax inspections. Bulk-safe with automatic retries, tolerant of messy input formats, $5 per 1,000 validations flat.

• MCP server URL: https://mcp.apify.com?tools=apifmcpfactory/eu-vat-validator
• Apify Store: apify.com/apifmcpfactory/eu-vat-validator
• Try an example task: run it with sample input
• Details: eu-vat-validator/

🤖 llms.txt Checker

A complete AI readiness audit for any website in one pass: checks llms.txt, llms-full.txt, robots.txt AI-crawler policy (GPTBot, ClaudeBot, PerplexityBot, Google-Extended, CCBot, Bytespider), and sitemap.xml, then returns a 0–100 AI readiness score with a plain-English list of exactly what to fix. ~$5 per 1,000 sites.

• MCP server URL: https://mcp.apify.com?tools=apifmcpfactory/llms-txt-checker
• Apify Store: apify.com/apifmcpfactory/llms-txt-checker
• Try an example task: run it with sample input
• Details: llms-txt-checker/

Connect all three tools at once

One MCP server URL exposes any combination of tools. To give your agent the full MCP Factory toolkit:

https://mcp.apify.com?tools=apifmcpfactory/tech-stack-detector,apifmcpfactory/eu-vat-validator,apifmcpfactory/llms-txt-checker

Claude Desktop (claudedesktopconfig.json):

{
    "mcpServers": {
        "mcp-factory": {
            "command": "npx",
            "args": [
                "mcp-remote",
                "https://mcp.apify.com?tools=apifmcpfactory/tech-stack-detector,apifmcpfactory/eu-vat-validator,apifmcpfactory/llms-txt-checker",
                "--header",
                "Authorization: Bearer YOUR_APIFY_TOKEN"
            ]
        }
    }
}

Cursor (.cursor/mcp.json):

{
    "mcpServers": {
        "mcp-factory": {
            "url": "https://mcp.apify.com?tools=apifmcpfactory/tech-stack-detector,apifmcpfactory/eu-vat-validator,apifmcpfactory/llms-txt-checker",
            "headers": {
                "Authorization": "Bearer YOUR_APIFY_TOKEN"
            }
        }
    }
}

Shortened. The full README is on GitHub.