What is Postman?
Postman is a free tool used by developers to quickly and easily send REST, SOAP, and GraphQL requests and test APIs. It is available as both an online tool and an application for Linux, macOS, and Windows. Postman allows you to quickly issue API calls and see the responses in a nicely formatted, searchable form.
We have made a Postman collection for Avalanche, that includes all the public API calls that are available on the AvalancheGo instance, allowing you to quickly issue commands to your node and see the response, without having to copy and paste long and complicated
Along with the API collection, there is also the example Avalanche environment for Postman, which defines common variables such as the IP address of the node, your Avalanche addresses, and similar common elements of the queries, so you don't have to enter them multiple times.
Combined, they will allow you to easily keep tabs on your node, check on its state and do quick queries to find out details about its operation.