Transport for Grenoble, France vs Transport for Paris, France

Open-data API behind Grenoble metro area's "M" mobility site (SMMAG), covering the transit network's stops, lines, real-time schedules (via an embedded OpenTripPlanner instance), and shared-mobility points like Métrovélo bike lockers and Citélib car-share stations. Every endpoint is keyless and returns JSON by default, with CSV/XLS exports offered for point-type datasets.

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.