Starting from 3.4.2023, use of Digitransit APIs will require registration. The registration is now open. More information
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Work with us

Interested in developing with us? Great! Best way to get started is to read this documentation, see what's happening on our demo sites and familiarize yourself with component code. Should you live in Finland, you can also Visit us at HSL premises (Opastinsilta 6A Helsinki)

Fastest way to ask questions is probably through @HSLdevcom in Twitter.