X-Agent-Key: sq_agt_*. Scopes: read_draft_orders, write_draft_orders.
Status flow: open → invoice_sent → completed (converts to a real order).
Request bodies wrap the resource: { "draft_order": { … } }.
Endpoints
POST /draft_orders·GET /draft_orders(cursor) ·GET /draft_orders/{id}·PUT /draft_orders/{id}·DELETE /draft_orders/{id}POST /draft_orders/calculate— compute totals without savingPOST /draft_orders/{id}/send_invoice— setinvoice_sent+ invoice URLPOST /draft_orders/{id}/complete— create the realorder+ line items, linkcompleted_order_id
draft_orders/create|update|delete.