Autofill checkout fields

[Harri_Sarsa]

Hey,

I'm working with an HTML5 hybrid app. I'm on a page where I have all the fields for the user already known (name, address etc). Is it possible to generate a checkout URL that I could open in a new window that would have everything I want autofilled? I assume https://help.shopify.com/api/tutorials/sell-through-the-checkout-api#creating-a-checkout would work (the JS SDK at least doesn't seem to offer anything for this), but I'm getting unauthorized response (same API token works for other resources tho) – not sure if I got my head around what creds are required for the checkout API.

[Harri_Sarsa]

Apparently the checkout API is available only for whitelisted sales channel apps. Is there any way around this without e.g. script injection to the form website?

[Harri_Sarsa]

Turns out you can construct the URL like this to autofill the fields:

checkoutUrl = variant.checkoutUrl()
checkoutUrl += "&checkout[email]=#{email}" +
"&checkout[billing_address][first_name]=#{firstName}" +
"&checkout[billing_address][last_name]=#{lastName}" +
"&checkout[billing_address][address1]=#{address}" +
"&checkout[billing_address][city]=#{city}" +
"&checkout[billing_address][country]=#{country}" +
"&checkout[billing_address][zip]=#{postalCode}"

Hope this helps someone else!