Generate API Mocks in seconds

Open-source Mock Server to quickly create mock API endpoints for testing without creating an actual API. Edit Content-Type, Status Code, Headers, and Response body easily on the Mock Server.

Generate content using AI

GPT-based API Response generator will help you create custom responses faster.

Host Files

Upload any HTML/CSS/JS files and generate public links.

Set HTTP Headers

Set mock API’s HTTP Headers and Status Code

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Application and Use Cases

Here’s how you can use Requestly’s Mock Server feature in your daily workflow

Mock Backend Response

When the backend isn’t ready and you want to mock the API response.

Mock Different Formats

Besides mocking an API Response, we also allow you to write plain HTML/CSS/JS on our editor and test it out without deploying.

Manage Your Mocks

Test the Mocks you created using our API Client. Apart from editing Content-Type, Status Code and body of the response, you can also set latencies to test the responses.

More from Requestly

An open-source platform that speeds up your web development cycle 10X faster.

Web Debugger

Lightweight web debugging proxy to modify HTTPs request & response. Modify Headers, API Requests, Inject scripts & do much more with this open-source tool.

Mock API Server

Generate custom API responses without actually having a pre-built API or a backend server. Edit Content-Type, Status Code, Headers, and Response body easily on the Mock Server.

Session Recording

Data rich bug reporting with Network logs, Console logs, Session Video and environment details. Share it with your Engineering team for faster debugging.

For the developers, by the developers ❤️

From Debug to Deploy: Developers Trust Requestly

Requestly’s browser extension is remarkably easy to use. As a full-stack developer, I often need to test data-intensive UI for edge cases and performance. Using Requestly I can do it very easily by mocking network requests, without needing code changes or database seeding.

Divyanshu Sharma
Full-stack Developer at ShortLoop

Great tool for frontend developers and QA tester for API response, redirects, mock data and much more. Requestly removes the dependency on waiting for backend API’s. Really useful to have in your frontend development environment.

Samroon Michael
Senior Frontend Developer at Mudah.my

Requestly comes as a savior whenever the Adobe platform debugger shows a glitch in the launch library override. I used Requestly for redirect and mockup file server and it really helped me in dev and debugging. The interface is easy to use and creating a rule on one machine and accessing it from different machines makes it awesome.

Pradeep Jaiswal
Technical Lead Consultant ShyftLabs

Requestly is awesome. I used to use Charles proxy in my day-to-day work but it always messed with my wifi. I haven’t had any issues with Requestly. Requestly’s UI is an amazing tool and great to work in.

Carl Hand
Senior Software Engineer at Workday

Requestly not just made it easier for us to develop, test & debug our code on our customer sites but also helped us do engaging product demos to our prospective clients.

Michael Levinson
Co-Founder & CPO at Joyned

I’m a big fan of Requestly, and use it on a daily basis as a QA Engineer. It removes the need to use Charles Proxy often, which is always nice. I can just use Requestly directly in Chrome

Mike Mitchell
QA Engineer at URBN

Awesome tool. I use it almost daily for my projects to modify request body, headers, etc. Would recommend it to every frontend developer out there. Thank me later 🙂 (Case Study)

Harsh Vats
Frontend Engineer at PingSafe

This is by far the best tool for managing request headers! Plus the developers are very active meaning you’ll get help if you’re ever stuck or need help solving a problem. I use it daily and couldn’t be happier.

Jose Browne
Senior Engineer at Reddit

App works as expected! Ran into some small issues while creating the rules but the support team was able to help and overcome those.

José Miguel Dias Fernandes
Development Lead at Vodafone

Requestly is user-friendly, brilliant and easy-to-use. I use it on an daily basis and it makes my work easier. After using other tools like Charles – Requestly is a nice new breath of air that I highly vouch for. Apart from the tool being amazing – the support from the Requestly team is phenomenal with them always going above and beyond for their clients.

Marius Ludick
Solutions Architect II at Amazon

Requestly is an amazing tool to get your development work less hassle. The product itself has evolved so much since day-1 and the company is really serious on helping their customer solves their problems. We had this nice session where they shared Requestly features and we were very impressed on its potential. A truly 5-star worthy.

Natchapol Thongruang
Senior Software Engineer at Agoda