Shared Transport Feeds - atlregional/OpenTripPlanner GitHub Wiki
Shared transport like bike-, car- and ride-share systems tend to use one-off APIs to communicate about availability.
Perhaps there should be a feed standard for shared transport systems. Here are some examples of existing feeds/APIs:
CapitalBikeshare DC (uses same spec as all PB/Bixi systems):
Velib with individual station info. This is a ferociously stupid design which should not be emulated.