Simple question. How can I sync to jacktransport on linux.
I tried to find information on this topic, but was unsuccesful
Is there an external to get information about bpm, ticks (clocks) etc. ? Or is it built into pd anyhow?
Syncing to midi clock is easy, but how to sync to jacktransport clock, start, stop etc.

The easiest is probably to use https://github.com/x42/jack_midi_clock to create MIDI realtime messages based on the jack transport.