Requestly

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Introduction

Requestly began as a browser extension for modifying HTTP requests and responses and has grown into an API client. Its README describes a modern, Git-native API client where you can ‘switch from Postman in 1 click’, with local, team-sync or self-hosted storage.

Beyond sending requests, Requestly can intercept and modify browser and desktop traffic: redirect URLs, change headers, mock API responses, inject scripts and delay requests. This makes it useful for front-end testing when a backend is not ready or to reproduce edge cases.

BrowserStack lists Requestly as its ‘privacy-first API client’, and the repository’s licence notes copyright by BrowserStack. Code outside an ee/ directory is licensed under AGPL-3.0. The README says it is free for up to 10 collaborators.

In the quality loop it supports API exploration, mocking and debugging during development and testing.

The source code is at requestly/requestly on GitHub under the AGPL-3.0 (outside its ee/ directory) licence, with about 6,800 stars; the most recent commit was on 29 July 2026.

Features

1. API client: Collections, environments and scripts.
2. Git-native storage: Local files, team sync or self-hosting.
3. HTTP rules: Redirect, modify headers and bodies, delay requests.
4. API mocks: Mock responses for front-end testing.
5. Postman import: Switch collections over quickly.

Pros

1. Client plus interceptor: Covers testing and debugging in one tool.
2. Free to use: Open source under the AGPL-3.0 (outside its ee/ directory) licence, so the core tool costs nothing to use.
3. Actively maintained: The repository had commits as recent as 29 July 2026.
4. Community: About 6,800 GitHub stars.

Cons

1. Licence nuance: AGPL-3.0 with enterprise code under a separate licence.
2. Platform shift: Now part of BrowserStack; plans may change.

Usage and Links (Example)

1. Install the desktop app or browser extension.
2. Import a Postman collection or create requests.
3. Add a ‘Modify API Response’ rule to mock an endpoint while testing the front end.

Resources:

• Requestly website
• GitHub repository

Pricing

Free for up to 10 collaborators according to the README; paid and enterprise plans available. See site.

Recommended for?

1. Front-end and QA teams who need to mock or modify traffic.
2. Teams leaving Postman for a Git-native client.

Conclusion

Requestly combines an API client with powerful traffic modification, useful for testing front ends against edge cases.

On CheckOps, Requestly is filed under the API & contract testing and Integration testing stages. Related tools listed here include Postman, Bruno, Insomnia, HTTP Toolkit, Proxyman and Charles Proxy. Before choosing, compare them on licence, supported languages and platforms, hosting model, and how well each fits your existing CI pipeline. Facts on this page were checked against the official website, documentation and repository on 11 November 2026; statements the vendor makes about its own product are marked as vendor claims.