To use the Unified API, developers should register for an application key. Append the
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 here, or build it yourself from the Swagger file.