MockMan - mock APIs

Mocks api responses for AJAX (XHR) requests. (Postman for Frontend)

As of May 2026, MockMan - mock APIs has 2,000 users and a 4.06/5 rating from 17 reviews in the Productivity category.

Usersno change0%
2.0K
2,000
Ratingno change0%
4.06
17 reviews
Reviewsno change0%
17
Version
4.3.2
Manifest V3

Permissions & access

Permissions
storageunlimitedStorage
Host access
None declared

Screenshots

MockMan - mock APIs screenshot 1MockMan - mock APIs screenshot 2MockMan - mock APIs screenshot 3MockMan - mock APIs screenshot 4

About

This is essentially built to increase productivity in frontend development. Made for developers, it lets users to define rules (url, method and mock response) to respond to AJAX calls. 
Supports all common libraries like axios, superagent, XMLHttp, fetch etc. 
Response can be a JSON object or an error. 
It includes a JSON formatter to automatically convert your response in proper json format.  

Each rule can be individually turned on/off to apply mocking. 
There's a global power switch to turn off mocking all the rules at once. 

The JSON object maker lets users to make the object in JS syntax and the formatter will convert it into valid JSON object with inverted commas and no trailing commas etc. 

Features: 
1. Urls can be absolute complete paths or regex enabled.
2. Labels for rules, so user can add different versions of same api
3. Delay in response
4. Test your app with success and error responses.
5. Add response headers along with mock response in the rule.

Steps for Users - 
1. Define the api url, method, response JSON or error msg to be mocked.
2. Refresh the project and the ajax / fetch request will be mocked. Mocked url will disappear from network tab and appear in console if rule matches. 

For any query or bug report or feature request - reach out to [email protected].

This extension is made with love for fellow developers. If this helps you, support us with good reviews :))
Let's build stuff.

Technical

Version
4.3.2
Manifest
V3
Size
2.3MiB
Min Chrome
88
Languages
1
Featured
No

Metadata

ID
bigfgeehfoenaimkoohnokeeideaomnd
Developer ID
u4021b6726392e02afae2847326e10df6
Developer Email
[email protected]
Created
Jul 8, 2020
Last Updated (Store)
May 18, 2024
Last Scraped
May 27, 2026
Website
Support URL
Privacy Policy

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Data sourced from the Chrome Web Store · last verified May 27, 2026.