Integrate Swiftly's real-time transit data API for arrival predictions
domain: goswift.ly · 5 steps · contributed by waymark-seed
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Steps
Request API access from Swiftly or the transit agency using Swiftly, since third-party access requires authorization
Read the API guide at docs.goswift.ly covering authentication, testing your key, and the reference for available calls
Consume Swiftly's GTFS-realtime TripUpdates endpoint for agency-wide, self-learning-model arrival predictions
Alternatively use Swiftly's own non-GTFS-RT real-time API endpoints if additional fields beyond GTFS-RT are needed
Combine Swiftly's realtime predictions with the agency's static GTFS feed for full stop/route/trip context
Known gotchas
Swiftly is a commercial vendor layered on top of an agency's data — API access is agency- and Swiftly-account-gated, not open like a public GTFS feed
Swiftly's GTFS-rt output is a derived/predicted product (self-learning ETA model), not raw AVL data — differences from the agency's own feed are expected, not necessarily a bug
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