I work for logistics company and we are integrating for customer with their Shopify accounts in order to retrieve the orders and post confirmations. we do not have records of the retrieved orders therefore we have to obtain the full list every time. In order to retrieve list of order we would like to use the "tags" and when the order is retrieved we would like to update the tags value. Would like to know if this is possible.
Retrieving an order by tags via a GET and then updating the Order tags value with a PUT is doable - check out the Orders Resource documentation as a great first step. Let me know if any further questions - thanks!