API Mocker V1 icon

API Mocker V1

by lmyr586 · Developer Tools
Manifest V3 Free
View in Chrome Web Store Data as of 16 Oct 2026

Intercept, modify and mock HTTP requests

Users
20
+2 in 30 days
Rating
5.0 / 5
unchanged in 30 days
Ratings
1
0 in 30 days
Store rank
#150K
#125K among extensions
Version
1.0.0
updated 16 Dec 2025

Users

monthly, 10 months
01020Dec 2025Jun 2026Oct 2026
Latest, 16 Oct 2026: 20 usersMove the mouse over the chart for any month

Ratings count

monthly, 10 months
001Dec 2025Jun 2026Oct 2026
Latest, 16 Oct 2026: 1 ratingsMove the mouse over the chart for any month

The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.

About API Mocker V1

API Mocker - The Ultimate API Mocking & Testing Tool Short Description Intercept, modify, and mock HTTP requests directly in your browser. No backend required. Long Description API Mocker is a powerful developer tool that gives you complete control over your browser's network traffic. Whether you're a frontend developer waiting for backend APIs, a QA engineer testing edge cases, or a designer tweaking UI states, API Mocker streamlines your workflow by allowing you to simulate any API response instantly. Why You Should Install It: 🚀 Zero Backend Dependency: Start building your frontend immediately. Define API rules and get JSON responses without writing a single line of backend code. ⚡ Accelerate Development: Stop waiting for API deployment. Mock missing endpoints and proceed with your UI implementation. 🧪 Test Edge Cases Easily: How does your app handle a 500 error? Or a 404? Or a slow network? Simulate these scenarios with a single click to ensure your app is robust. Key Features: Intercept & Modify: Automatically capture XHR and Fetch requests matching your custom URL patterns. Dynamic Rule Management: Create, edit, and toggle mocking rules on the fly with a clean, intuitive interface. Flexible Matching: Support for exact URL matching and wildcard patterns (e.g., /api/users/*). Full Response Control: Customize HTTP status codes (200, 400, 500, etc.), response headers, and response bodies (JSON, Text, XML). Network Simulation: Add artificial delays to simulate slow network connections and loading states. Visual Notifications: Get real-time feedback when a request is intercepted and mocked. How It Works: Open the API Mocker interface. Add a new rule (e.g., Match https://api.example.com/users). Define the response you want (Status 200, Body: [{ "id": 1, "name": "Test User" }]). Browse your site. When the app requests that URL, API Mocker intercepts it and serves your defined response instantly. Perfect for: Frontend Developers, QA Testers, and Full Stack Engineers looking for a lightweight, browser-based mocking solution. Privacy-First: API Mocker runs entirely within your browser. No data is sent to external servers.

Growth

WindowUsersChangeRatingsRating
7 days+2+11.1%00.00
30 days+2+11.1%00.00
6 months+5+33.3%00.00

Chrome Web Store search rankings

Where API Mocker V1 appears when people search the store, with the 30 day change
Search phrasePosition30 days
mock#80−6

Version history

1 versions recorded
1.0.016 Dec 2025

Details

Category
Developer Tools
First seen
16 Dec 2025
Size
61 KB
Languages
en
Pricing
Free
Extension ID
cdefiomopfbidjlidpaacadeecmcmeac

Permissions and risk

Moderate riskimpact 2, likelihood 2
Permissions
storage
Site access
<all_urls>
Can read and change data on every website you visit.

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