This website accompanies a talk/workshop (here’s the slide deck) that discusses and compares various API testing tools and best-practices. I’ve re-created the same API test suite in several different tools to make it easy to compare and contrast them in terms of features, ease-of-use, syntax, etc.
This is the REST API that we’re testing. It’s a fun list of technology-themed superheroes, sidekicks, and villains.
Restlet is a free Chrome extension that’s so easy to use that anybody can build API tests.
Postman is a free app that makes it easy to build, test, and document your APIs. It has powerful API testing features that strike a good balance between power and ease-of-use.
Stoplight is a powerful API development tool that’s based on OpenAPI (fka Swagger). Its tight integration with OpenAPI enables powerful features like automatic contract verification and code-coverage analysis.