What is your favorite API tool?

Question

For defining, testing and documenting

Pubudu Kodikara · Accepted Answer

This is what I use every day. Covers my requirements well!

Alvin Frank · Answer

Free and powerful solution for API testing demand.

Himanshu Mishra · Answer

Automatically generate (read single command) API clients (in different languages) and documentation from code. 
I tried it to generate Java Client for Test Automation on REST APIs written in Java Spring MVC. 
Compared to Postman, it doesn't require you to add any end point manually. It will go through your code and do that job for you.

Max Schmitt · Answer

Simple, fast, cross-platform and open source. If Postman feels a little complex for your needs, try Insomnia!

Ayrton De Craene · Answer

If you're doing mobile app development that interacts with external (or your own) APIs, Charles is an absolute must. You can see every outgoing API call and debug it.

Edwin Khoo · Answer

Very easy to use for testing APIs.

Paul Moiseev · Answer

definitely postman

Paul Loffredo · Answer

without a doubt, Postman.

Daniel Wilkinson · Answer

Great collection and very nice design & layout.

Alvin Frank · Answer

Free and powerful solution for API testing demand.

Anthony Morris · Answer

Publish any process as a web service. Shape, combine and transform data from backend databases, legacy systems and applications. Expose data end-points as an API to retrieve, create, update, or delete data as part of an automated backend process.

Guillaume · Answer

Mockoon is a fast and easy to use REST API mocking desktop app.
 
Disclaimer: I created Mockoon :)

P-Edward Lieb · Answer

I use Paw on a daily basis and it is truly an exceptional product to play with an API

Pierre-Philippe · Answer

New on the market, take a look 😊

Peter Thomas · Answer

The only open-source tool to combine API test-automation, mocks and performance-testing into a single, unified framework.

Hussein Yahfoufi · Answer

If you are on a Mac Paw is pretty slick