Tech Stack Detector API

Free API to detect technologies, frameworks, and tools used by any website. Identifies 219 technologies across 19 categories including frameworks, CMS, analytics, CDN, security, and more.

Version: 1.3.0 | Live API: 51-68-119-197.sslip.io/tools/techstack

Quick Start

# Detect technologies on a website
curl "https://51-68-119-197.sslip.io/api/techstack?url=https://github.com"

# With API key for higher limits
curl -H "X-API-Key: YOUR_KEY" \
  "https://51-68-119-197.sslip.io/api/techstack?url=https://shopify.com"

Example Response

{
  "url": "https://github.com",
  "technologies": [
    {
      "name": "Ruby on Rails",
      "category": "framework",
      "confidence": "medium"
    },
    {
      "name": "Turbo",
      "category": "js_library",
      "confidence": "medium"
    },
    {
      "name": "HSTS",
      "category": "security",
      "confidence": "high"
    }
  ],
  "_signatures": 219,
  "_version": "1.3.0"
}

Technology Categories (21)

Category	Count	Examples
CMS	31	WordPress, Shopify, Docusaurus, GitBook, Notion
Widgets	22	Intercom, Algolia, Google Maps, Leaflet, Zendesk
JS Libraries	21	Redux, D3.js, GSAP, Socket.io, Moment.js
Platforms	15	Vercel, Firebase, Supabase, Deno Deploy
JS Frameworks	19	React, Vue, Angular, Svelte, Solid.js, Qwik
Servers	12	Nginx, Apache, LiteSpeed, Caddy, Envoy
Frameworks	12	Next.js, Django, Rails, Laravel, Astro
Analytics	12	GA4, Plausible, Amplitude, PostHog, Clarity
Marketing	14	Mailchimp, Facebook Pixel, ConvertKit, Klaviyo
CDN	10	Cloudflare, Fastly, CloudFront, jsDelivr
CSS Frameworks	7	Tailwind, Bootstrap, Bulma, Chakra UI
Monitoring	7	Sentry, Datadog, New Relic, Bugsnag
Build Tools	6	Webpack, Vite, Parcel, esbuild, Turbopack
Payment	5	Stripe, PayPal, Paddle, Gumroad, Braintree
Security	4	HSTS, CSP, X-Frame-Options
E-commerce	4	WooCommerce, Magento, BigCommerce
Auth	4	Auth0, Firebase Auth, Clerk, Supabase Auth
Optimization	4	Cloudinary, Imgix, Lazy Load

Rate Limits

Tier	Limit
No API key	10/day (2/min burst)
Free API key	5 requests/minute, 50/day

Get a free API key at 51-68-119-197.sslip.io/tools/techstack.

Use Cases

• Competitive analysis - See what tech your competitors use
• Lead generation - Find companies using specific technologies
• Market research - Understand technology adoption trends
• Security auditing - Identify outdated or vulnerable tech stacks
• Sales intelligence - Target prospects based on their tech stack

Other APIs by Hermes

API	Description
Dead Link Checker	Find broken links on any website
Screenshot API	Capture full-page website screenshots
SSL Certificate Checker	Validate SSL certificates
SEO Analyzer	Analyze on-page SEO factors
Performance Audit	Page load speed analysis

OpenAPI Spec

Available at: /openapi/techstack

License

MIT