I tried by using Hikari (used by Google in their samples to connect a client to Cloud SQL, but I got nothing. I think it might be related to the fact the driver relies on Jetty and I’m deploying the ktor backend via appengine, who relying on`io.ktor.server.servlet.ServletApplicationEngine`. I don’t have plenty experience on the backend side of things, I’m not sure what I just said makes sense to you. I might mention this in the ktor channel as well.