Add shipping rates at checkout from third-party shipping service

Hi all,

First time on this forum. Does anyone know how to show different shipping rates at checkout that are calculated/supplied via a third-party service like Starshipit. Essentially, the client wants this to automatically update with the latest rates from different couriers based off of the address the customer puts in and the product weight.

I’ve managed to get this working in Zapier - connecting the WF “new order” trigger to Starshipit “Get rates” action, however I’m not sure how to display this at checkout and bypass the native webflow add shipping methods.

I hope the above made sense.

Any help would be greatly appreciated.