You can literally embed private, outbound-only connectivity into your application code using one of the many SDKs - C, Java, Go etc etc... here is a good overview https://ziti.dev/. As you can embed inside you app, you can now build 'zitifications' which is apps which have native, private connectivity embedded both client or server side.

Here are a couple of cool artciles on some we have already done: - Springboot framework: https://blogs.oracle.com/javamagazine/post/java-zero-trust-o... - Prometheus: https://openziti.github.io/articles/zitification/prometheus/...

Yes: https://github.com/openziti/ziti-sdk-c/