Other token grant_types or ways to get the token?

For our interaction with iMIS another application will be requesting the api's via scheduled jobs and not via user interaction. For other application api's we are using using Keycloak for the authentication.

Do the iMIS apis use a url to get the JWK or possibly have the key somewhere on the server so that that key can be replaced or the location overridden via a property? If not does it allow a grant type of client_credentials and do you have any examples?

Thanks