What are some alternatives?
Apigee - Intelligent and complete API platform
Postman - Postman is the most efficient way to test, develop and document APIs.
Paw - Paw is a REST client for Mac.
MuleSoft - MuleSoft provides an integration platform for connecting any application, data source or API, whether in the cloud or on-premises.
Runscope - Log, monitor and measure your API usage to solve API problems fast.
Apiary - Collaborative design, instant API mock, generated documentation, integrated code samples, debugging and automated testing