Depending on the type of blog you are using, you may not be able to integrate WordPress. 

If you are using, you can certainly add the HTML or JavaScript code of your Agendize widget in the template file ( or HTML/ Text widget) of your WordPress theme. 

Unfortunately, does not allow JavaScript as it can be used for malicious purposes.  For more information, please visit WordPress support page here. However, we suggest the use of the "email" code snippet.  Go to Tools> and click on Publish of the button you want to use.