Transport for Berlin, Germany vs Transport for Paris, France

vbb-rest is an open-source, community-built REST wrapper around VBB's official HAFAS backend for Berlin and Brandenburg public transit, covering stop search, departures, journeys, and live vehicle positions in the Friendly Public Transport Format (JSON). It's keyless and free, now on its 6th major version — the previously indexed v3 endpoint is deprecated in favor of v6.vbb.transport.rest.

RATP's own open-data catalog (separate from the region-wide Île-de-France Mobilités PRIM portal), an Opendatasoft-hosted Explore API. Its 26 datasets cover per-station air quality readings, annual station entry-traffic counts, and points of interest such as defibrillators, water fountains, public toilets, and licensed nearby shops for the Paris metro, RER, tram, and bus network. No accessibility or network-reference dataset is published. Public dataset reads work anonymously with no key over the v2.1 Explore API.