Support and Sponsorship

By Alan RichardsonUpdated 2026-02-18

This application is made available free to the public thanks to the generosity of our sponsors and supporters.

Their support helps:

If you are a company or corporation that would like to sponsor the project then contact Alan Richardson for more details.

Current Platinum sponsor

EvilTester.com free online training and books related to Software Testing and Development. Also including The Evil Tester Show podcast, and YouTube video channel.

Thank you to everyone who helps supports this project by being a part of our Patreon programme:

Thank you to all previous sponsors:

Challenge Solutions
How to learn APIs
Tutorials Interactive tutorials on how to test APIs, send HTTP requests, and practise with the API simulator.
- How to Test REST APIs
- API Simulator Walkthrough
Reference Tutorials Reference tutorials covering HTTP basics, REST APIs, OpenAPI, Swagger, and practical API testing concepts.
Practice Modes Hands-on API practice modes for simulation, challenges, simple APIs, buggy APIs, mirror testing, and API From Hell scenarios.
Tools Tool reviews for REST HTTP clients, proxies, and online API clients to help with API testing.
- REST/HTTP Clients
  - Summary Reviews
  - Detailed Reviews:
    - Bruno
    - cURL
    - Httpie
    - Insomnia
    - Katalon
    - Kreya
    - Milkman
    - Postman
    - SoapUI
    - Yaak
- Proxies
- Online Clients
Practice Sites Public practice sites and sample applications for API testing, from simple GET APIs to fuller app examples.
- All Practice Sites
- Simulators
- Basic GET
  - Random User
  - Swapi
- Basic
  - Dummy JSON
- Full
  - Simple API
- Apps
Sponsors
Change Log

You can support this site from as little as $1 a month on Patreon.

The support pays for site hosting and the expansion of this content.

In addition, Patreon Supporters gain access to exclusive online video training courses and ebooks.