This site hosts all public geographic datasets for Port Authority, including current and historical route and stop data, park and ride locations, service walksheds, fare vending locations, and more. Data is available in a variety of formats and is updated frequently.
To request API access, please login or create an account, then click "Request Access" under "Developer API."
Other Developer Resources
Here is a list of other resources available to developers.
Realtime information for use in digital displays (kiosks, etc.) - https://stoptimes.portauthority.org/default?address=345%20Sixth%20Ave%2015222 The parameter 'address' will take a full or partial address and return a number of stops around that address and realtime arrival for busses servicing that stop. Best viewed on 1080p displays or similar.