Beta API

Stack Detection API Documentation

Identify technology stacks, frameworks, CDNs, and security configurations - 80+ technologies detected

Stack Detection API - New!

Identify technology stacks, frameworks, CDNs, and security configurations. Detects 80+ technologies with confidence scoring. No API key required - 5 requests per day per IP address!

Stack Detection Endpoint

GET /stack?url={url}

Analyze any website to identify its technology stack. Detects 80+ technologies including frontend frameworks, backend platforms, CDN providers, analytics tools, and security configurations.

Parameters:

url - The URL to analyze (required)

includeCss - Include CSS stylesheet URLs in response (optional, default: false)

Authentication:

No API key required

Rate Limiting:

5 requests per day per IP address • Resets at midnight UTC

Stack Detection Example

curl "https://api.ogfetch.com/stack?url=https://github.com"

Response Schema & Detected Stack

https://ogfetch.com

Frontend

ReactNext.jsv2.2.1Webpack

Analytics

Google Tag Manager

CDN

Cloudflare, Vercel

Server

cloudflare / Next.js

Security

B2 headers

Detected technologies grouped by category with confidence indicators.

Response Schema

Stack Detection Response

{
  "url": "https://ogfetch.com",
  "analyzedAt": "2025-10-25T18:14:41.812Z",
  "technologies": [
    {
      "name": "React",
      "confidence": "high",
      "detectedFrom": ["HTML", "Scripts"],
      "category": "frontend"
    },
    {
      "name": "Next.js",
      "version": "2.2.1",
      "confidence": "high",
      "detectedFrom": ["HTML", "Scripts", "Headers"],
      "category": "frontend"
    },
    {
      "name": "Webpack",
      "confidence": "medium",
      "detectedFrom": ["HTML", "Scripts"],
      "category": "frontend"
    },
    {
      "name": "Google Tag Manager",
      "confidence": "low",
      "detectedFrom": ["HTML"],
      "category": "analytics"
    }
  ],
  "server": {
    "name": "cloudflare",
    "poweredBy": "Next.js"
  },
  "cdn": ["Cloudflare", "Vercel"],
  "security": {
    "score": "B",
    "headers": [
      "strict-transport-security",
      "x-content-type-options"
    ],
    "missingHeaders": [
      "content-security-policy",
      "x-frame-options",
      "x-xss-protection",
      "referrer-policy",
      "permissions-policy"
    ]
  }
}

Technology Categories

Frontend: React, Vue.js, Angular, Next.js, Svelte, Webpack, Vite

Backend: Node.js, Express, Django, Laravel, Ruby on Rails, Spring Boot

CDN: Cloudflare, Vercel, Netlify, AWS CloudFront, Fastly, Akamai

Analytics: Google Analytics, Google Tag Manager, Facebook Pixel, Hotjar, Mixpanel

Security: Auth0, Okta, Firebase Auth, reCAPTCHA, hCaptcha

Payment: Stripe, PayPal, Square

CMS: WordPress, Shopify, Contentful, Strapi, Sanity, Prismic

UI: jQuery, Bootstrap, Tailwind CSS, Material-UI, Ant Design, Chakra UI

Total: 80+ technologies detected across all categories

Confidence Levels

High Confidence

3+ matches OR detected in headers

🟢

Medium Confidence

2+ matches OR detected in 2+ sources

🟡

Low Confidence

1 match from single source

⚪

Security Analysis

The API evaluates 7 critical security headers:

•Strict-Transport-Security

•Content-Security-Policy

•X-Frame-Options

•X-Content-Type-Options

•X-XSS-Protection

•Referrer-Policy

•Permissions-Policy

Security Scoring:

A6-7 headers (90-100%)

B5-6 headers (75-89%)

C4-5 headers (60-74%)

D3 headers (40-59%)

F0-2 headers (0-39%)

Use Cases

Competitive Analysis

Identify technologies used by competitors to inform your technology decisions

Security Auditing

Check security header implementation across your portfolio of websites

Technology Discovery

Build databases of technology adoption trends and market research