Website Technology Detector API: Identify Any Site's Tech Stack with Confidence Scoring

Introduction

Knowing what technologies power a website is valuable across sales, security, competitive analysis, and due diligence. Whether you are qualifying leads by their CMS, auditing a client’s infrastructure, or researching competitors, manually inspecting page sources, headers, and scripts does not scale.

Website Technology Detector Pro API by ASOasis Tech identifies the technology stack behind any URL. It detects 82+ technologies across 19 categories using five distinct signal types—HTTP headers, meta tags, script/link sources, HTML patterns, and cookies—and returns structured results with weighted confidence scores. Batch support lets you scan up to 10 URLs per request.

Why This API Exists

Existing approaches to technology detection have significant limitations:

• Browser extensions: Require manual interaction—useless for programmatic analysis at scale.
• Web scraping: Fragile, slow, and limited to what is visible in the HTML without understanding headers or cookies.
• Open-source libraries: Often outdated rule sets with no confidence scoring, and require hosting and maintenance.

The Website Technology Detector Pro API handles the complexity of multi-signal detection and confidence scoring as a managed service. Built in Go and deployed on AWS Lambda, it delivers low-latency results without any infrastructure burden on your side.

Key Features

1. 82+ Detectable Technologies

Covers CMS platforms (WordPress, Shopify, Wix), JavaScript frameworks (React, Next.js, Vue.js, Angular), analytics tools (Google Analytics, Hotjar, Mixpanel), CDN providers (Cloudflare, AWS CloudFront, Fastly), hosting platforms (Vercel, Netlify, Heroku), e-commerce (WooCommerce, BigCommerce, Magento), web servers (Nginx, Apache, LiteSpeed), languages (PHP, Python, Ruby, Node.js), CSS frameworks (Tailwind CSS, Bootstrap), and more.

2. 5 Signal Types

Detection goes beyond simple HTML parsing. The engine analyzes:

• HTTP Headers — Server, X-Powered-By, CDN-specific headers
• Meta Tags — Generator meta, OpenGraph tags
• Script/Link Sources — CDN URLs, library file patterns
• HTML Patterns — CSS classes, data attributes, framework markers
• Cookies — Session cookie name patterns

3. Weighted Confidence Scoring

Each signal type carries a specific weight. Scores are aggregated and capped at 100, giving you a clear measure of detection reliability:

4. Implication Resolution

When the engine detects WordPress, it automatically adds PHP and MySQL to the results—because WordPress requires them. This cascading logic applies across the technology graph, giving you a more complete picture of the stack without relying solely on direct signals.

5. Batch Processing

Scan up to 10 URLs in a single API call with concurrent processing. Useful for bulk prospecting, portfolio audits, or competitive surveys without making individual requests.

6. Technology Catalog Endpoint

A dedicated endpoint lists all 82 detectable technologies with their categories, so you can build filters and UI components without hardcoding technology names.

Getting Started

Step 1: Subscribe on RapidAPI

Head to the Website Technology Detector Pro API on RapidAPI and subscribe to a plan.

Step 2: Get Your API Key

Retrieve your RapidAPI Key and Host from the dashboard after subscribing.

Step 3: Detect Your First Tech Stack

curl --request POST \
  --url "https://website-technology-detector-pro.p.rapidapi.com/v1/detect" \
  --header "Content-Type: application/json" \
  --header "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY" \
  --header "X-RapidAPI-Host: website-technology-detector-pro.p.rapidapi.com" \
  --data '{"url": "https://example.com"}'

Step 4: Parse the Response

The API returns structured JSON with detected technologies, categories, confidence scores, and matched signals.

API Reference

Endpoints

Base URL: website-technology-detector-pro.p.rapidapi.com

Single Detect Request

{
  "url": "https://example.com"
}

Batch Detect Request

{
  "urls": [
    "https://example.com",
    "https://shopify.com",
    "https://wordpress.org"
  ]
}

Technology Categories

Use Cases

Sales Intelligence

Qualify leads by their tech stack. Find companies running Shopify, WordPress, or a specific CMS and tailor your pitch to their platform. Integrate detection results into your CRM to enrich prospect profiles automatically.

Competitive Analysis

Understand what technologies your competitors use—from their frontend framework to their analytics and CDN provider. Track technology shifts over time to spot strategic moves.

Agency Prospecting

Identify potential clients using outdated platforms or specific technologies where you have expertise. A site running an old CMS version or missing a CDN is a clear sales opportunity.

M&A Due Diligence

Assess the technology landscape of acquisition targets. Understanding the tech stack early helps estimate integration costs, identify technical debt, and plan migration strategies.

Security Auditing

Discover technologies in use for vulnerability assessment. Knowing the exact web server, CMS version, or framework narrows the scope of security testing and helps prioritize known CVEs.

Integration Examples

Python

import requests

url = "https://website-technology-detector-pro.p.rapidapi.com/v1/detect"
headers = {
    "Content-Type": "application/json",
    "X-RapidAPI-Key": "YOUR_RAPIDAPI_KEY",
    "X-RapidAPI-Host": "website-technology-detector-pro.p.rapidapi.com"
}
payload = {"url": "https://example.com"}

response = requests.post(url, json=payload, headers=headers)
result = response.json()

for tech in result.get("technologies", []):
    print(f"{tech['name']} ({tech['category']}) — Confidence: {tech['confidence']}")

JavaScript (Node.js)

const axios = require('axios');

async function detectTechStack(targetUrl) {
  const options = {
    method: 'POST',
    url: 'https://website-technology-detector-pro.p.rapidapi.com/v1/detect',
    headers: {
      'Content-Type': 'application/json',
      'X-RapidAPI-Key': 'YOUR_RAPIDAPI_KEY',
      'X-RapidAPI-Host': 'website-technology-detector-pro.p.rapidapi.com'
    },
    data: { url: targetUrl }
  };

  const response = await axios.request(options);
  console.log(response.data);
}

detectTechStack('https://example.com');

Batch Detection (Python)

import requests

url = "https://website-technology-detector-pro.p.rapidapi.com/v1/detect/batch"
headers = {
    "Content-Type": "application/json",
    "X-RapidAPI-Key": "YOUR_RAPIDAPI_KEY",
    "X-RapidAPI-Host": "website-technology-detector-pro.p.rapidapi.com"
}
payload = {
    "urls": [
        "https://shopify.com",
        "https://wordpress.org",
        "https://vercel.com"
    ]
}

response = requests.post(url, json=payload, headers=headers)
results = response.json()

for site in results:
    print(f"\n{site['url']}:")
    for tech in site.get("technologies", []):
        print(f"  {tech['name']} — {tech['confidence']}%")

Pricing

For current pricing and plan details, visit the pricing page on RapidAPI.

How It Compares

Conclusion

The Website Technology Detector Pro API by ASOasis Tech provides a practical, multi-signal approach to website technology detection. With 82+ technologies across 19 categories, weighted confidence scoring, implication resolution, batch processing, and a lightweight Go + AWS Lambda backend, it fits into sales pipelines, competitive research workflows, security audits, and due diligence processes without requiring browser automation or scraping infrastructure.

Resources

• RapidAPI Page: Website Technology Detector Pro API
• ASOasis Product Page: Website Technology Detector API
• Support: support@asoasis.tech