API Caveats

Due to certain sections of the Sub-surface railway (H&C, District, Circle, Metropolitan Lines) that are still running on old radio signals and therefore don’t interface with Trackernet (which is the source feed for the Unified API’s tube predictions). These means for the following stations, no live data can be provided through the API.

The full list of stations that are in this situation are:

• Bow Road
• Elm Park
• Becontree
• Dagenham Heathway
• Upton Park
• Mile End
• Stepney Green (Eastbound)
• Bayswater
• Notting Hill Gate

This will get resolved when the 4LM project delivers new signalling across those lines

Source