Hello Waz,

The TabStrip widget allows you to change the default GET method send to obtain tab content from remote to POST. What has to be done to achieve the desired is to pass an object instead of a string to the contentUrls collection of the widget:

$("#tabstrip").kendoTabStrip({
  contentUrls: [
    null,
    {
      url: "https://demos.telerik.com/kendo-ui/content/web/tabstrip/ajax/ajaxContent1.html",
      cache: true,
      method: "POST",
      data: {
      	test: "test"
      }
    }
  ]
});

Here you could find a small sample implementing the above: https://dojo.telerik.com/Adosorob/3

The same is yet not available in an MVC scenario. Nevertheless, for that case you could follow the suggestion posted in the following forum thread:

https://www.telerik.com/forums/tabstrip---how-to-pass-model-to-partial-views-using-loadcontentfrom#w6JcCoJuO0i2_2AXptLd3Q

Regards,
Veselin Tsvetanov
Progress Telerik