pulsar

It might be possible in some way, but it might not be the most optimal solution.

I'd recommend using a loosely coupled API which doesn't expose Pulsar to Android clients.
One possible way of achieving this is creating a Spring Boot application that uses the Spring Pulsar support to interact with Pulsar.
You can expose a REST API for your use cases. It's a few lines of code to do this in Spring Boot.
It's easy to add proper security with Spring Security.

There's a recent recording "Introducing Spring for Pulsar" by the awesome <@U03ENNB8HPC> and <@U03RM6GQ2M9>: <https://www.youtube.com/watch?v=ltDpip8s6Uk&amp;list=PLqRma1oIkcWjMn9ytQueYSP9HCc28756R&amp;index=6> . This is worth watching!