HTTP Headers Analyzer

HTTP Headers Analyzer is a simple NestJS API that performs an HTTP request to a given public URL and returns the response headers. This tool is useful for debugging, web inspections, and security analysis.

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🔍 What It Does

Given a URL, the API:

• Sends an HTTP HEAD request (or fallback to GET if needed)
• Extracts the response headers (like Content-Type, Server, Cache-Control, etc.)
• Returns them in JSON format

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📦 Example Request

GET /headers?url=https://www.google.com

✅ Example Response

{
  "url": "https://www.google.com",
  "headers": {
    "content-type": "text/html; charset=ISO-8859-1",
    "x-frame-options": "SAMEORIGIN",
    "strict-transport-security": "max-age=31536000; includeSubDomains",
    "date": "Mon, 12 May 2025 09:00:00 GMT"
  }
}

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🧠 Use Cases

• Check if a site has CSP, HSTS, or X-Frame-Options enabled
• Inspect server technologies via headers
• Validate CDN caching headers
• Learning HTTP header behavior without browser devtools

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✍️ Author

Made with ❤️ by Atelier Busco

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📄 License

MIT © Atelier Busco