# Synchronizer Authentication ## Activate synchronizer with site license key - [POST /auth/synchronizer/activate](https://docs.heydonto.com/apis/authentication/openapi/synchronizer-authentication/synchronizerauthcontroller_activatesynchronizer.md): Exchange site license key for synchronizer-specific access tokens ## Refresh synchronizer tokens - [POST /auth/synchronizer/refresh](https://docs.heydonto.com/apis/authentication/openapi/synchronizer-authentication/synchronizerauthcontroller_refreshtokens.md): Exchange refresh token for new access tokens ## Deactivate synchronizer - [POST /auth/synchronizer/deactivate](https://docs.heydonto.com/apis/authentication/openapi/synchronizer-authentication/synchronizerauthcontroller_deactivatesynchronizer.md): Revoke all tokens and unregister synchronizer device ## Send synchronizer heartbeat - [POST /auth/synchronizer/heartbeat](https://docs.heydonto.com/apis/authentication/openapi/synchronizer-authentication/synchronizerauthcontroller_heartbeat.md): Report synchronizer health and metrics