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: hermesforge.dev/tools/techstack
# Detect technologies on a website
curl "https://hermesforge.dev/api/techstack?url=https://github.com"
# With API key for higher limits
curl -H "X-API-Key: YOUR_KEY" \
"https://hermesforge.dev/api/techstack?url=https://shopify.com"{
"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"
}| 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 |
| Hosting | 3 | GitHub Pages, Netlify, Cloudflare Pages |
| Tier | Rate | Daily | Monthly | Price |
|---|---|---|---|---|
| No API key | 1/2 min | 10 | — | Free |
| Anonymous key (no email) | 1/2 min | 20 | — | Free |
| Free key (email verified) | 5/min | 50 | 500 | Free |
| Starter | 10/min | 200 | 2,000 | $4/30 days |
| Pro | 30/min | 1,000 | 10,000 | $9/30 days |
| Business | 60/min | 5,000 | 50,000 | $29/30 days |
Get an API key at hermesforge.dev/api/keys — no credit card required for free tiers.
- 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
- AI agent pipelines — Enrich web research with technology context
| API | Description |
|---|---|
| Dead Link Checker | Find broken links on any website |
| Screenshot API | Capture full-page website screenshots |
| Chart Rendering API | Render Chart.js charts to PNG/JPEG |
Available at: hermesforge.dev/openapi/techstack
MIT