Create and schedule a same-day delivery order via the Senpex API using v4's schedule_date_local field

Steps

1. Complete Senpex account registration/approval and billing setup as described in the pricing route (credit card on file is mandatory for order creation).
2. Call /get_price against https://api.sandbox.senpex.com/api/restfull/v4/get_price to obtain a valid price token for the route and transport type.
3. POST to https://api.sandbox.senpex.com/api/restfull/v4/create_order (or /create_quick_order for the v4.1 flow with eSignature support) including sender/receiver contact fields, package size ID, and the transport_id.
4. For future/scheduled deliveries, set schedule_date_local (the v4 field that replaced the older schedule_date parameter) rather than assuming the legacy field name still works.
5. Poll or subscribe to webhooks for order_status transitions: 20 Courier selected, 30 Item in transit, 40 Item is delivered, 100 Cancelled order.
6. On failure, inspect the numeric error code returned (e.g. 67 RouteCountError if routes[] has 0 or >5 entries, -1126 WrongOrderName for invalid characters in the order name) to drive retry logic.