What parameters can be submitted to WooCommerce Cart?

I am writing a WooCommerce plugin for a shop and I am having trouble finding what parameters can be submitted to the cart. So far I have only:

• add-to-cart
• post_type

I would like to possible change the price, quantity and even the product image if that is even possible.

Anyway anyone able to help me get this info?

Thanks

via Chebli Mohamed