MockPro is a versatile Chrome extension designed for developers who require efficient API mocking capabilities directly in their browser. This tool allows users to intercept and mock network requests for REST APIs, Server-Sent Events (SSE), and WebSocket connections effortlessly. With features like custom status codes, headers, and response bodies, MockPro provides full control over the data your application receives, making it an essential tool for frontend development, testing, and debugging without the need for external setups.

The extension boasts advanced matching capabilities, allowing for precise control over request interception based on URL patterns, HTTP methods, headers, and body content. It also includes a professional code editor with JSON syntax highlighting, request logging, and a JSON Tree View for visualizing response structures. MockPro works entirely within the browser, ensuring data privacy, as no information is sent to external servers, and it is available as a free and open-source solution.