Detect Any Website's Tech Stack With a Single API Call

Knowing what technologies a website uses is valuable for competitive intelligence, security audits, lead generation, and vendor evaluation. But manually inspecting HTTP headers, HTML source, and DNS records is tedious and incomplete.

DetectZeStack solves this with a single API call that runs four detection layers simultaneously and returns a comprehensive technology profile.

The Four Detection Layers

These layers complement each other. Wappalyzer catches front-end frameworks and CMS platforms. DNS and TLS catch infrastructure that's invisible to HTML analysis. Together they paint a complete picture.

Quick Start

Analyze any website with a single GET request:

curl "https://detectzestack.com/analyze?url=stripe.com" \
  -H "X-Api-Key: YOUR_KEY"

Response:

{
  "domain": "stripe.com",
  "url": "https://stripe.com",
  "technologies": [
    { "name": "Cloudflare", "categories": ["CDN"], "confidence": 100 },
    { "name": "React", "categories": ["JavaScript frameworks"], "confidence": 100 },
    { "name": "Next.js", "categories": ["Static site generator"], "confidence": 100 },
    { "name": "Nginx", "categories": ["Web servers"], "confidence": 100 },
    { "name": "webpack", "categories": ["Build tools"], "confidence": 100 },
    { "name": "Node.js", "categories": ["Programming languages"], "confidence": 100 }
  ],
  "meta": {
    "status_code": 200,
    "tech_count": 6
  }
}

Batch Analysis

Need to analyze multiple sites at once? The /analyze/batch endpoint handles up to 10 URLs in a single request with concurrent processing:

curl -X POST "https://detectzestack.com/analyze/batch" \
  -H "X-Api-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"urls": ["stripe.com", "shopify.com", "vercel.com"]}'

All URLs are analyzed concurrently, so the total time is roughly the same as analyzing a single slow site.

Comparing Tech Stacks

The /compare endpoint shows shared and unique technologies across multiple sites:

curl -X POST "https://detectzestack.com/compare" \
  -H "X-Api-Key: YOUR_KEY" \
  -H "Content-Type: application/json" \
  -d '{"urls": ["github.com", "gitlab.com"]}'

The response includes shared technologies (used by both) and unique technologies per domain. This is invaluable for competitive analysis—seeing where competitors' stacks diverge reveals their technical priorities.

Caching and Performance

Results are cached for 24 hours. Cached responses return in under 5ms, and the response includes X-Cache: HIT or X-Cache: MISS headers so you know whether you're seeing fresh data.

For time-sensitive use cases, the cache ensures you're not hammering target websites with repeated requests—good for both performance and being a respectful API consumer.

Practical Applications

Lead Generation

Sales teams can filter prospects by technology. Selling a Shopify app? Find sites running Shopify. Offering WordPress security? Find WordPress sites. The batch endpoint makes this efficient at scale.

Security Posture Assessment

Combine tech detection with CPE identifiers (included in the response) to check each technology against the NVD vulnerability database. See our CPE vulnerability scanning guide for details.

Migration Planning

Before migrating a website, document its complete tech stack programmatically. Use the /history endpoint to track changes over time and verify that nothing was lost in the migration.

Market Research

Analyze hundreds of sites in a market segment to understand technology adoption trends. Which frameworks are gaining share? Which CDNs dominate? The data tells the story.

What's Next

We're actively developing new features including scheduled monitoring, expanded technology signatures, and more. Follow our blog for updates.

Related Articles

• Website Technology Checker API — Complete guide with code examples in curl, Python, and JavaScript
• BuiltWith vs Wappalyzer vs DetectZeStack — Full three-way comparison
• Detect Vulnerable Technologies with CPE — Security auditing with CPE identifiers