VBB GTFS Realtime Feed

The VBB GTFS Realtime feed can be found at the following URL:
https://production.gtfsrt.vbb.de/data

• It is licensed as CC-BY 4.0.
• You can fetch it without authentication, up to a limit of 60 requests per minute.
• It has CORS enabled, so you can query it from any webpage.
• It is served with an ETag header, allowing clients to cache it.
• The code behind this is open.