The API uses the RESTful approach. Only GET (for get actions) and POST (for create, update and delete actions) requests are allowed. Other methods will be rejected silently.
See the Cloud API Documentation for TeamViewer IoT under https://docs.teamviewer-iot.com/cloud-api/.
Please note that the current TeamViewer IoT Cloud API will be deprecated as of 31.12.2021 and replaced with TeamViewer Web API so we strongly suggest moving to Web API and use only the Web API going forward.