Is creating an Azure Key Vault reference supported through REST API?

Hi partofthejob​,

Yes, that is the distinction reflected in the current Microsoft documentation. The documented workflow for creating the Azure Key Vault reference itself is through Manage Connections and Gateways in Fabric.

The Fabric REST API documentation separately describes how an existing Key Vault connection can be referenced when creating supported connections through the API.

As a next step, you can create the Azure Key Vault reference through Manage Connections and Gateways, then use its connection ID when creating supported connections through the REST API.

I hope this helps. Please feel free to reach out if you have any further questions.
Thank you.