Check user existenceΒΆ

Important notice: This API is provided as a proof of concept, it might change or be removed at any time in the future.

To get access to the checkuser API follow these steps:

  1. Your client needs the gk_checkuser and gk_checkuser_systemlookup scopes. To get these please send a message to

  2. Contact the organisation whose users you wish to check the existence of. The organisation needs to log in to dataporten and give your client access to their data sources. The organisation needs to accept your request for the systemlookup scope.

To use the checkuser API simply send a request to the following endpoint with your access token

Example request:

GET /check_single/username@domain HTTP/1.1
Authorization: Bearer 0f0935c3-a997-40fb-89c2-f7da126ba5d9