Paw vs. Runscope vs. APItools

Paw is a full-featured and beautifully designed Mac app that makes interaction with REST services delightful. Either you are an API maker or consumer, Paw helps you build HTTP requests, inspect the server's response and even generate client code.

Keep tabs on all aspects of your API's performance with uptime monitoring, integration testing, logging and real-time monitoring.

APItools is a service for developers to test and debug API traffic, troubleshoot, etc. and for devops to monitor API traffic. Available in the cloud and on-premise. Open source. In private beta.