Samtrafiken is committed to support at least the API versions included in the latest major profile version and the previous major profile version. More information on API Official Support.
Each Major Profile has its own Release Notes page linked to in the profile tag in below table.
MTS 1 - Mobile Ticket Format
MTS 2 - Device Key Derivation
MTS 3 - Coordinated Ticket Name Space
MTS 4 - Coordination and Key Management
MTS 5 - Proof-of-possession Authorisation Tokens
MTS 6 - TICKLE – A Language for Ticket Validation
MTS 7 - Token - ID based travelling
* - It was decided on CAB 2021-11-23 that Traveller API 3.0.0 was to be introduced in both major profile 2019-1 and 2020-1 since no one had implemented the previous version