Transport for Paris, France
HTTP CORS ? Free
RATP Open Data API
API Endpoint
http://data.ratp.fr/api/v1/console/datasets/1.0/search/More Transportation APIs
Access real-time and historical data of any and all airborne aircraft
HTTPS CORS ? Free
Get name and website-URL for airports by ICAO code
HTTPS CORS ? Free
Real-time data of any marine and inland vessel equipped with AIS tracking system
HTTP CORS ? apiKey