I still own a Webvan share certificate to remind me of stupid things I did during the last bubble. Anyway... Does Google Express have an API? I'd be great if I

I still own a Webvan share certificate to remind me of stupid things I did during the last bubble. Anyway... Does Google Express have an API? I'd be great if I could a) automate my repeat orders and b) be a bit opportunistic for non-perishable promo items. That's what I do in store - I buy either Evian or San Pelegrino depending in promos.