Requestly - Free API Testing & Mocking Tool

Open-Source API Client & HTTP Interceptor. API Collections, Environments, JS Redirects, API Mocks, Modify Headers and Insert Scripts

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Requestly - Free API Testing & Mocking Tool

Requestly is a powerful Chrome extension trusted by over 200,000 developers for API testing and mocking. With an intuitive user interface, it supports various features like API collections, environments, JavaScript redirects, and HTTP interception to streamline your development process.

Key Features:

Open Source: Contribute and customize as per your needs.
API Client: Test responses seamlessly with full localStorage support.
Mock APIs: Build frontend applications faster by mocking API responses that aren't ready yet.
HTTP Interceptor: Modify requests, responses, and headers directly to debug or simulate scenarios.

Experience enhanced team collaboration and effortless debugging with Requestly. Learn more and access documentation on our website.

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By:: https://requestly.com
Users:: 200,000+
Rating:: 4.32
(1,232)
Version:: 24.11.25 (Last updated: 2024-12-30)
Creation date:: 2020-06-02
Risk:: Very high risk impact Very low risk likelihood
Permissions:: contextMenus
declarativeNetRequest
proxy
scripting
storage
tabs
unlimitedStorage
webNavigation
webRequest
Host permissions:: <all_urls>
Size:: 898.05K
Email:: co*****@requestly.io
URLs:: Website ,Privacy policy
Full description:: See detailed description
Source:: Chrome Web Store
Updated:: a day ago

Ranking

# 1,303 ▼ 18

Other rankings

#23 in Developer Tools ▲ 1

#7 in mock keyword 18 ▼ 1

#7 in modify keyword 40

#8 in request keyword 18

#17 in override keyword 20

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Other platforms

Requestly - Free API Testing & Mocking Tool (v24.11.25)

15,565+ 4.10

(14)

User reviews

Pros

User-friendly interface and easy to set up
Invaluable for mocking APIs and intercepting requests
Great support and responsiveness from the development team
Seamless integration with existing Postman collections
Continuous development and addition of new features

Cons

Limited functionality without a paid subscription
Recent changes shifted important features to premium only
Requires account creation and login to access features
Monthly fees may not be clearly communicated initially
Users express frustration about the transition from free to paid features

Most mentioned

API Client feature is highly praised
Transition from Postman is smooth
Support team is responsive and helpful
Tool is effective for web debugging and QA
Frequent updates and improvements based on user feedback

These summaries are automatically generated weekly using AI based on recent user reviews. User reviews may be inaccurate, spammy, or outdated.

User reviews

Incredible Tool for API Testing & Interception! Requestly has been a game-changer for my workflow! As a developer, I often need to modify API requests, test different scenarios, and debug network calls. This extension makes it incredibly easy to intercept, modify, and mock requests without needing complex setups. What I love about Requestly: ✅ User-friendly Interface – Super intuitive and easy to navigate. ✅ Powerful Features – Modify requests, redirect URLs, block ads, and test APIs effortlessly. ✅ Time Saver – Eliminates the need for local proxies or backend changes. ✅ Works Seamlessly – Reliable and doesn’t slow down my browser. I've tried many similar tools, but nothing comes close to the flexibility and ease of use that Requestly offers. Highly recommended for developers, testers, and anyone dealing with APIs!

Raja, 2025-03-24

rubbish！doesn't works without internet! then how dare you called "Local-first Developer Tool"? ridiculous!

if elif, 2025-03-22

It isn't free. You must pay to use this extension.

Maxime Talon, 2025-03-10

View all user reviews

Extension safety

Risk impact

Requestly - Free API Testing & Mocking Tool requires a lot of sensitive permissions. Exercise caution before installing.

Risk impact analysis details

Critical Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
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Risk likelihood

Requestly - Free API Testing & Mocking Tool has earned a good reputation and can be trusted.

Risk likelihood analysis details

Medium This extension has medium user count. Unpopular extensions may not be stable or safe.
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