BurpJSLinkFinder is a Burp Suite extension that performs passive scanning of JavaScript files to identify endpoint links within web applications. The extension operates by analyzing JavaScript code through both static and dynamic analysis techniques to discover potential API endpoints, URLs, and other links that may be embedded in client-side scripts. As a passive scanning tool, it automatically examines JavaScript files encountered during web application testing without requiring active interaction or modification of requests. The extension is designed to assist security researchers and developers in identifying potential attack surfaces and vulnerabilities by mapping out endpoints that might not be immediately visible through traditional web application crawling. It integrates directly into the Burp Suite platform, allowing users to leverage the discovered endpoints for further security testing and vulnerability assessment activities.