Transport for London Unified API


To use the Unified API, developers should register for an Application ID and Key. Append the app_id and app_key query parameters to your requests.

The public TfL data (or 'open data') released here is for open data users to use in their own software and services. We encourage software developers to use this data to present customer travel information in innovative ways - providing they adhere to the transport data terms and conditions.


You can browse and experiment with our REST API in Swagger UI, or build it yourself from the Swagger file.


We also curate our API collection in Postman, and make available our API response types for other developers using the .NET framework.