https://community.viessmann.de/t5/The-Viessmann-API/Error-PACKAGE-NOT-PAID-FOR/m-p/615114#M3439 <P>Hi,</P><P>&nbsp;</P><P>I have set up my developer portal and configured a client, but any API call results in "<SPAN>PACKAGE_NOT_PAID_FOR" I don't think this should be the case for trying to do basic things with the free tier. My emails to&nbsp;<A href="mailto:developer@viessmann-climatesolutions.com" target="_blank">developer@viessmann-climatesolutions.com</A>&nbsp;are not being answered. Please advise.</SPAN></P><P>&nbsp;</P><P><SPAN>Thanks</SPAN></P> Sun, 12 Apr 2026 17:10:28 GMT dctherandomguy 2026-04-12T17:10:28Z https://community.viessmann.de/t5/The-Viessmann-API/Error-PACKAGE-NOT-PAID-FOR/m-p/615114#M3439 <P>Hi,</P><P>&nbsp;</P><P>I have set up my developer portal and configured a client, but any API call results in "<SPAN>PACKAGE_NOT_PAID_FOR" I don't think this should be the case for trying to do basic things with the free tier. My emails to&nbsp;<A href="mailto:developer@viessmann-climatesolutions.com" target="_blank">developer@viessmann-climatesolutions.com</A>&nbsp;are not being answered. Please advise.</SPAN></P><P>&nbsp;</P><P><SPAN>Thanks</SPAN></P> Sun, 12 Apr 2026 17:10:28 GMT https://community.viessmann.de/t5/The-Viessmann-API/Error-PACKAGE-NOT-PAID-FOR/m-p/615114#M3439 dctherandomguy 2026-04-12T17:10:28Z