| Connected account | The connected account to use for the request | Connected Account | Yes | |
| Deal ID | The ID of the deal to add a product to | Text (Short) | Yes | |
| Product ID | The ID of the product to add to a deal | Text (Short) | Yes | |
| Item price | Price at which to add or update this product in a deal | Number with decimals | Yes | |
| Quantity | How many items of this product to add/update in a deal | Number | Yes | |
| Comments | Text to describe this product-deal attachment | Text (Long) | No | |
| Discount percentage | Percentage of discount to apply | Number | No | |
| Product variation ID | ID of the product variation to use | Text (Short) | No | |