I was hoping to set a header image on a Paypal Chained Payment in a similar way to an Express Checkout using the API. To achieve this with the Express Checkout you just set a URL on HDRIMG eg. https://www.x.com/developers/paypal/documentation-tools/api/setexpresscheckout-api-operation-nvp
However I couldn't find any reference to do something similar using the Adaptive Payments API. https://www.x.com/developers/paypal/documentation-tools/api/pay-api-operation
Is it even possible?
