Entrust CA Gateway provides the API described at: 

https://api.managed.entrust.com/doc

Of the capabilities documented in this reference, PKIaaS supports natively the ones listed in:

https://api.managed.entrust.com/doc/#operation/caCapabilities

To implement the other capabilities, you must integrate a third-party tool as explained in this section.

• Generating CA Gateway credentials
• Accessing the CA Gateway API
• Integrating with Ansible
• Integrating with HashiCorp Vault
• Integrating with KeyFactor CLM
• Integrating with ServiceNow
• Integrating with Venafi