Install a REST client
Since Celonis APIs are REST API, you will need to have a way to interact with it. There are multiple ways to do this, but to make things simple, we will use Postman, which is a very popular free REST client.
If you already have a REST client, you can ignore this section.
Otherwise, go to the Postman Download page and download it for your Operating System. Once it's downloaded, install it.
Once installed, it should look like something like this:
To start using it, create an account or click on "Skip and go to the app".