If your API is not available on the public internet, you must expose it via a service such as https://ngrok.com/
The API pane is a REST interface that allows you to create and modify your existing APIs. All REST HTTP methods are supported and API values can be configured in the headers, params, and body fields
Importing CURL Commands
Appsmith makes it easy to import your APIs into your application using CURL commands.
Passing Data/Parameters To API Calls
There are various ways to pass parameters to API calls on Appsmith. This video shows three ways to pass data to API calls: