To create an order with multiple items, include them as a list in the items array when sending the request to the Create orderAPI endpoint.

curl
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curl -X POST \
    -H 'accept: application/json' \
    -H 'Content-Type: application/json' \
    -H 'Authorization: Bearer ENV_ACCESS_TOKEN' \
    -H 'X-Idempotency-Key: UNIQUE_KEY' \
    'https://api.mercadopago.com/v1/orders' \
    -d '{
  "type": "online",
  "processing_mode": "manual",
  "total_amount": "250.00",
  "external_reference": "order_pro_123",
  "payer": {
    "email": "buyer@email.com"
  },
  "items": [
    {
      "title": "My product 1",
      "unit_price": "100.00",
      "quantity": 1,
      "unit_measure": "unit",
      "total_amount": "100.00"
    },
    {
      "title": "My product 2",
      "unit_price": "75.00",
      "quantity": 2,
      "unit_measure": "unit",
      "total_amount": "150.00"
    }
  ]
}'