# Product sets Managing product sets. ## Add item to product-set - [POST /api/products/{guid}/set](https://api.docs.shoptet.com/shoptet-api/openapi/product-sets/additemtoproductset.md): This method adding product defined by product variant to the bundle (product set). Product defined in url by , must be set as : . When successfully saved, complete list of products in the set is returned in response. It is not allowed to add a product of the type to an existing product set. ## Set product-set items - [PUT /api/products/{guid}/set](https://api.docs.shoptet.com/shoptet-api/openapi/product-sets/setproductsetitems.md): This method set given products (minimum 0, maximum 50), defined by product variant to the bundle of products (product-set). Product defined in url by , must be set as : . When successfully saved, complete list of products in the set is returned in response. It is not allowed to add a product of the type to an existing product set.