Oh, gRPC over JSON still gives you the advantage of a well-defined API. But I use OpenAPI aka Swagger for that because it's a much thinner layer, especially if

Oh, gRPC over JSON still gives you the advantage of a well-defined API. But I use OpenAPI aka Swagger for that because it's a much thinner layer, especially if for whatever reason I need to handle HTTP GET (callbacks/webhooks) in addition to my typical HTTP POST JSON.