If you don’t find an app that already does this, the first step would be to find out how you can do this in the game client using mouse and keyboard input. It sounds like you are using EVE Online. I would open the menu on the surroundings button (the sun icon in the info panel) and see if you find the bookmark in there.
If you find your bookmark in that menu, it probably has submenus to initiate warping to that location.
If that route works for you, recording the context menu entries’ names would be sufficient to adapt an existing bot to use your bookmark. Using context menus is a popular approach to navigating in EVE Online, so the implementation to get a menu entry for a given label is already in place.
Here is an example of how such an adaption of an existing bot works: Eve Jetcan Mining
People often use screenshots like this to clarify how their game client looks:
