# HppSessionProductInput

A model the API reference uses in a request or a response. The operation pages link every field typed as this model here.

One product on the cart a payment link carries: the product and the quantity to start it at.

## Fields
- `productId` (string(uuid)) required: The catalog product, which must be one the page sells.
- `quantity` (number(double)): The quantity to start the order at. Zero leaves an optional product out of the order (the  payer can add it back); a required product needs a quantity inside its limits. (min 0, max 9999)

## See also

- [All documentation](https://devportal.demo.winkpg.io/llms.txt): the machine-readable index of every public page on this site.