The basic usage of the Developer Portal is free of charge. Use the API to integrate your Viessmann device into other (third-party) smart home applications or start developing your own solution. With our API, you can for example to visualize data in your own customized way, change the operating mode and connect your Viessmann heating system with other devices.
We offer you free access to basic functionalities with a limited number of API calls, which allows you to immediately start integrating and developing your application.
The basic usage of the Developer Portal is free of charge. If you are looking for more functionalities and/or a higher number of API calls, we will soon offer you different plans that perfectly match your needs.
Note: We reserve the right to charge a fee for the use of specific APIs and/or change the limitation of number of free API calls.
|Price per month||0 €|
|Free calls per day||1450|
|Number of API clients||1|
|Basic heating system functions|
|Domestic hot water functions|