Ending a session Last update: 17.06.2026 To end a Granta Material Picker session, send an HTTP DELETE request to the session URL. For example: requests.delete(f"{sessions_endpoint}{post_session_resp['id']}", json={}, headers=auth_header, verify=0) Ending a session disables the controls in the Granta Material Picker tab and displays the following message: Materials are no longer available on the data endpoints. If you do not end the session, it remains active and can be used to transfer additional material models.