We could use several tools to test our APIs, such as:
- WireShark (https://www.wireshark.org/) is a great tool for monitoring a network, and listening to all the packets received and sent from a network adapter.
- Postman (https://www.getpostman.com/) and Fiddler (https://www.telerik.com/fiddler) are also very useful tools for testing APIs to creating HTTP calls to communicate with. They install themselves as some kind of proxy to the computer. They can send and display request and response pairs to a particular URL.