Requestly

Requestly is a lightweight, open-source API client and HTTP interceptor designed for modern developers to build, test, and debug APIs faster. It provides a Git-friendly alternative to tools like Postman, offering both browser extensions and desktop applications for seamless API development and testing workflows. Trusted by over 300,000 developers from Fortune 500 companies including Microsoft, Amazon, Google, and Adobe.

Key Features:

• API Client - A feature-rich REST API playground that lets you save, organize, and test APIs with collections, environments, and pre/post scripts for request manipulation and response processing.

• HTTP Interceptor - Powerful capabilities to intercept, record, debug, and modify HTTP requests including URL redirects, header modifications, request body changes, and response overrides.

• API Mocking - Build frontend faster without waiting for backend by modifying API responses, creating mock endpoints, and simulating HTTP status codes with GraphQL support.

• Local & Team Workspaces - Keep everything private with local-first storage or optionally collaborate with teammates in shared cloud workspaces with role-based access control.

• Easy Import/Export - One-click migration from Postman, Bruno, and other tools with support for cURL, OpenAPI, and various collection formats.

• Cross-Device Testing - Test and debug across web, mobile, and desktop applications using the desktop app's proxy capabilities.

• Git Sync - Keep API collections synchronized with Git repositories for version control and team collaboration.

• Enterprise Security - SOC-II compliance, SSO/SAML integration, data encryption, audit logs, and GDPR compliance for enterprise requirements.

To get started, install the Chrome extension for instant browser-based testing or download the desktop app for more powerful local-first capabilities. Import existing collections from Postman or create new API requests directly. Use the HTTP interceptor rules to redirect URLs, modify headers, mock responses, or inject custom scripts for debugging and development workflows.