OC Transpo API.
OC Transpo, the public transit authority for Ottawa, provides an open data feed for developers building transit applications. The feed follows the GTFS-Realtime (GTFS-RT) standard for real-time next-arrival information, alongside static GTFS schedule data; an older stop-based API 2.0 was retired as of April 30, 2025. GPS position data is sent from buses to the server approximately every 30 seconds, though the agency notes gaps in accuracy can occur roughly 5% of the time due to equipment defects, latency, or network coverage issues.
The service also offers RSS feeds for service alerts in English and French. Registered developers may use the GTFS-RT data for both non-commercial and commercial purposes. OC Transpo does not provide technical support for building applications but makes documentation, release notes, and best-practices resources available through its developer portal, and can be contacted via email for questions about how the GTFS-RT feed works.
This is intended for developers creating desktop, web, or mobile applications that incorporate Ottawa transit schedule and real-time arrival data.
The GTFS and GTFS-RT feeds are open and freely available; there is no mention of any fee to access them.
OC Transpo uses the GTFS-Realtime standard for its open data feed, having retired its older stop-based API 2.0 as of April 30, 2025.
Yes, OC Transpo and the City of Ottawa allow registered developers to use the GTFS-RT data for both non-commercial and commercial purposes.
OC Transpo does not provide support for building applications, but developers can reach out to octranspo-dev@ottawa.ca with questions about how GTFS-realtime works.
Bus GPS data is sent to the server about every 30 seconds, though roughly 5% of the time positions may be inaccurate due to equipment defects, latency, or network coverage gaps.
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