MockFast - API Mock & Response Interceptor
Chrome extension by paul.rennison1983 · Productivity · Developer
- Trader
A Chrome extension in Productivity · Developer with 22 users, barely installed. Audience over the last 30 days: +2.
Every site you visit. This extension can read and change the content of any page you open.
What the developer says, and 2 screenshots
Loading from the Chrome Web Store. Open the listing if it does not appear.
- Users
- 22
- Users, last 30 days
- +2
- Version
- 1.0.2
- Updated in the store
- 2026-04-08
- Published
- 2026-04-02
- Manifest
- V3
- Browser access
- 4 permissions, 1 site pattern
How it has moved
- 2026-10-0817
- 2026-10-0920
- 2026-10-1019
- 2026-10-1320
- 2026-10-1821
- 2026-10-1919
- 2026-10-2120
- 2026-10-2218
- 2026-10-2319
- 2026-10-2421
- 2026-10-2520
- 2026-10-2821
- 2026-10-3022
- 2026-10-3122
- 2026-08-3112
- 2026-09-0214
- 2026-09-0614
- 2026-09-0815
- 2026-09-1014
- 2026-09-1313
- 2026-09-1516
- 2026-09-2019
- 2026-09-2118
- 2026-09-2520
- 2026-09-2621
- 2026-09-2820
- 2026-10-0817
- 2026-10-0920
- 2026-10-1019
- 2026-10-1320
- 2026-10-1821
- 2026-10-1919
- 2026-10-2120
- 2026-10-2218
- 2026-10-2319
- 2026-10-2421
- 2026-10-2520
- 2026-10-2821
- 2026-10-3022
- 2026-10-3122
A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times a day and record a point only when something moves. History beyond ninety days is in the app.
What it can reach
Every site you visit. This extension can read and change the content of any page you open.
-
Attach to pages the way developer tools do
debugger -
Act on the current tab, but only after you click it
activeTab -
Store data in your browser
storage
Show the remaining 1
-
Declares
windows
What changed recently
Nothing has moved on this listing since we started watching it.
The publisher
paul.rennison1983 publishes 7 listings we track, 73 users between them.
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Like this one
Listings the catalog judges closest in what they say they do.
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sk-mockAPI(developed by sachinkondana) 15 users
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API Mocker V1 22 users
-
API Interceptor - Mock API Responses & Intercept HTTP Requests 567 users
-
DevMock Pro - API Response Hijacker 3 users (last published figure)
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API Mock Interceptor 3 users
The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.
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[](https://extops.dev/extensions/fepcedbfeaciokbdlplippkllcdhmhak)<a href="https://extops.dev/extensions/fepcedbfeaciokbdlplippkllcdhmhak"><img src="https://extops.dev/extensions/fepcedbfeaciokbdlplippkllcdhmhak/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-10-30. We publish no contact details for extension developers.