For the server, simply run ps5-discord-rpc.elf on a jailbroken console. It will be accessible on port 7270. For the client, install whatever the latest Python version is as of writing this and run the client.

Building the payload

Assuming you already have all dependencies installed:

$ git clone https://github.com/azurejelly/ps5-discord-rpc
$ cd ./ps5-discord-rpc/server/
$ export PS5_PAYLOAD_SDK=/opt/ps5-payload-sdk
$ make

You will find the .elf file inside the build/ folder.