Create new cart
documentedCreate a new shopping cart.
POST /api/v2/cartCartno implementation yet0 runsInput
whmcs_domain*
WHMCS Base URL domain
example.com
product_id*
Product ID to add to cart
quantity*
Quantity
api_state
X-Api-State header value
optional cart state
Calls whmcs as you (your API key is your account); keychains.dev holds the credentials.