[LAU] Requesting MIDI port and/or audio port of an application

Hi, after startup a musical application normally has to connect to an audio port provided by jack and/or ALSA, and connect to MIDI ports as well, if it supports MIDI. What can I do to find out which audio ports and MIDI ports an application provides? So far I have been using aconnect to get a GUI list of which MIDI ports are available, and I have made the connections between MIDI ports manually. If we are lucky, an application can make the audio connections fully automatically, i.e. it connects to jackd audio ports automatically, so there is no user action required for connection. But this does not work with MIDI ports. I have to make connections between MIDI ports manually. Unfortunately, connecting to ports manually is not an option in my case because I have a program running that acts as a kind of host for other musical applications, and this application (keykit) has to know the port numbers of audio ports and MIDI ports of external applications that it should run to make the proper connections between their MIDI ports and their audio ports. Aconnect is no option here because with aconnect I have to get the MIDI ports out of it and then enter the ports manually in keykit. It has to be done by keykit and a helper tool launched via command line interface. Keykit can send commands to the system command line so it can launch external applications. What can I do? What is Your recommended option to get the MIDI ports and audio ports via a system command line interface tool? Thanks for any help and kind regards, Crypto.