You should be redirected automatically to target URL: <a href=“http://api.ordoro.com/label/?o=M-20180801-071502&pdf_type=single_page”>http://api.ordoro.com/label/?o=M-20180801-071502&pdf_type=single_page. If not click the link.”
The v3 orders API documentation can be found here https://devapiverson.docs.apiary.io/# for all orders related endpoints including the label retrieval endpoint referenced above. For Orders, if you are using v3 of Ordoro, you must use the apiverson.ordoro.com host rather than api.ordoro.com, the latter of which is used for all other non-orders related requests.