MockGQL is a Chrome DevTools extension designed for developers who work with GraphQL APIs. This free add-on allows users to intercept, inspect, and mock GraphQL requests directly from their browser. Key features include automatic request logging, detailed inspection of requests, and the ability to create custom mock responses for testing various scenarios. Developers can easily manage individual mock rules and simulate network conditions, making it a versatile tool for frontend development.

The extension supports both fetch and XMLHttpRequest methods, ensuring compatibility with any GraphQL endpoint. With a user-friendly interface that matches Chrome's dark theme, MockGQL requires minimal permissions and offers persistent storage for mock rules across sessions. This makes it ideal for debugging, testing edge cases, and handling error responses without altering backend code.