### Endpoint Overview

1. **Get Shipping Carriers**  
   This endpoint allows you to get a list of existing shipping carriers on your server, along with their Keys.  
   In order to use it, you must:
   - Be an authenticated user  
   For information on how you can authenticate, see **Authentication**.

2. **Update Purchase Order General Panel**  
   This endpoint lets you update the General panel details of an existing Purchase Order.  
   In order to use it, you must:
   - Be an authenticated user  
   For information on how you can authenticate, see **Authentication**.

3. **Update Shipping Information**  
   This endpoint is used to update the shipping information for a single existing order. The endpoint does not update tracking information.  
   To use this endpoint, you must:
   - Be authenticated.  
   - Have a valid ID of an existing order.  
   For information on how you can authenticate, see **Authentication**.

4. **Split Purchase Order**  
   This endpoint can be used to split a purchase order.  
   In order to consume the endpoint you must:
   - Be an authenticated user  
   For information on how you can authenticate, see **Authentication**.

5. **Get Custom Column Values**  
   This endpoint can be used to get the values of multiple custom columns of an order.  
   In order to consume the endpoint, you must:
   - Be an authenticated user  
   For information on how you can authenticate, see **Authentication**.

6. **Get User PO Saved Views**  
   This endpoint can be used to get the user PO saved views.  
   In order to consume the endpoint, you must:
   - Be an authenticated user  
   For information on how you can authenticate, see **Authentication**.

7. **Get Purchase Orders Using Saved View**  
   This endpoint can be used to get purchase orders using a saved view.  
   In order to consume the endpoint, you must:
   - Be an authenticated user  
   For information on how you can authenticate, see **Authentication**.

8. **Get Order Snapshot**  
   This endpoint can be used to get the order snapshot.  
   In order to consume the endpoint, you must:
   - Be an authenticated user  
   For information on how you can authenticate, see **Authentication**.

9. **Add Serial Numbers for PO**  
   This endpoint can be used to add serial numbers for PO.  
   In order to consume the endpoint, you must:
   - Be an authenticated user  
   For information on how you can authenticate, see **Authentication**.

10. **Delete Items from Purchase Order**  
    The endpoint presented in this article is used for deleting items from an existing purchase order.