Requestly

Requestly: Modern HTTP Interceptor & API Testing Tool

Requestly is a powerful, open-source HTTP interceptor designed for developers who need granular control over their API testing and network modifications. Available as both a browser extension and desktop application, it offers:

Key Features

• HTTP Request Modification: Intercept and modify headers, request bodies, and query parameters
• API Mocking & Testing: Built-in REST API playground with pre/post script support
• Cross-Platform Support: Works across major browsers (Chrome, Firefox, Safari, Edge) and desktop OS
• Team Collaboration: Flexible workspace options for both local and team environments
• Import/Export Capability: One-click import from Postman & Bruno
• Advanced Rules: URL redirections, response modifications, script injection
• Enterprise Features: Security compliance and team management

Use Cases

• API development and testing
• Network request debugging
• Cross-device testing
• Mock API responses
• Team collaboration on API projects
• GraphQL request modifications