How Do I Put an Item in Cart Through REST API Provided by WooCommerce?

In order to put an item in the cart through the WooCommerce REST API, you will need to make a POST request to the /cart/items endpoint. The body of your request should include the following parameters:

product_id: The id of the product you want to add to the cart

quantity: The number of items you want to add to the cart

You can also optionally include the following parameters:

variation_id: If the product you are adding to the cart is a variation of a product, you will need to include the variation id

variations: If the product you are adding to the cart is a variable product, you will need to include an object containing all of the variation attributes that have been selected. Each attribute should be included as an object with a “key” and a “value”.

For example, if you are adding a variable product to the cart that has two attributes (color and size), your variations parameter would look like this:

{  
   "variations":{  
      "color":"blue",
      "size":"medium"
   }
}

Conclusion:

Therefore, in order to add an item into shopping cart provided by WooCommerce through REST API, we make a POST request to their given endpoint which is ‘/cart/items’ . Following this, we provide required (and optional) parameters in JSON format such as product_id, quantity, variation_id, variations (etc.) which helps us successfully add an item(s) in shopping cart provided by WooCommerce.