Utilize the '/2.0/libraries/install' endpoint with the 'jar_uri' parameter to directly install the custom JAR file as a library without creating a new library entry.

Employ the '/2.0/libraries/create' endpoint with the 'jar_uri' parameter to create a new library entry for the custom JAR file, ensuring it is properly registered within the Databricks environment.

Access the '/2.0/jobs/libraries' endpoint with the 'jar_uri' parameter to add the custom JAR file as a library directly to the job, bypassing the need for a library creation step.

Invoke the '/2.0/clusters/libraries' endpoint with the 'jar_uri' parameter to attach the custom JAR file as a library to the cluster, assuming the cluster will handle the library management.