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!

Ayrton · 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.

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.

Edwin Khoo · Answer

Very easy to use for testing APIs.

Max Schmitt · Answer

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

Paul Loffredo · Answer

without a doubt, Postman.

Answer

definitely postman

Daniel Wilkinson · Answer

Great collection and very nice design & layout.

Evgeny_V · Answer

A beautiful and powerful app!

Peter Thomas · Answer

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

Guillaume · Answer

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

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.

Rick Hough · Answer

I've been building API test frameworks using Postman for about five years. Minimal coding skills required, easy to load that common code into a global variable and call the methods to other requests.  Easy to create and populate variables on the fly, and easy to write simple tests.

There are some (current) limitations like accessing databases but you can get around those if the developers can give you data end points instead.

Biggest plus for me is Postman makes it easy to organise your tests in a logical structure that can be shared with non-technical colleagues. Integrate into your CI with Newman and you have a robust, reliable regression strategy.

I have used RESTassured with Java but find Postman much easier to manage, maintain and share.

PE Lieb · Answer

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

Hussein Yahfoufi · Answer

If you are on a Mac Paw is pretty slick

Ankit Jain · Answer

One tool to help with

- Debugging HTTP request payloads
- Mocking HTTP responses with rules
- Proxying to a real API as well as Intercepting to inspect the payload.
- Mocking downstream APIs when load testing.
- Webhook testing

warmuuh · Answer

it is way more extensible and opensource. it also bring free team sync and exploration-tools for large json responses