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The Jsmon Chrome Extension performs security scans on your browser’s network traffic in the background. It automatically monitors web traffic and analyzes JavaScript files and API responses for security vulnerabilities — no manual uploads or proxies required. Install from Chrome Web Store

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How It Works

  1. Install the extension from the Chrome Web Store.
  2. Open the extension and enter your Jsmon API key to authenticate with your account.
  3. Browse normally — the extension passively captures traffic in the background.
  4. Matched file types are forwarded to Jsmon’s scanning engine for analysis.
  5. Findings appear in your Jsmon dashboard showing secrets, APIs, risks, and asset inventory.
You need a Jsmon API key to use this extension. Generate one from Settings → API in the Jsmon web app.

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What It Detects

  • Exposed Secrets — API keys, tokens, and leaked credentials in JavaScript or configuration files
  • Shadow APIs — Undocumented or forgotten endpoints in frontend code
  • Supply Chain Risks — Vulnerable or suspicious NPM packages loaded at runtime
  • Sensitive Data Exposure — PII, internal paths, environment variables
  • Misconfigured Assets — Insecure headers, open redirects, debug artifacts
The extension supports 20+ file extensions for analysis, including JavaScript, TypeScript, JSON, HTML, and more.

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Who It’s For

  • Security engineers conducting reconnaissance or penetration testing
  • AppSec and EASM teams monitoring external attack surfaces
  • Bug bounty hunters accelerating JavaScript reconnaissance
  • CISOs and compliance teams requiring continuous visibility

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Permissions

The extension requires access to:
  • Authentication information
  • Web history
  • Website content
Data is not sold to third parties, not used for unrelated purposes, and not used for creditworthiness determinations.

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Details