curl --request GET \
  --url https://production.trackstarhq.com/integrations/{integration_type}/{integration_name}/write-info \
  --header 'x-trackstar-api-key: <x-trackstar-api-key>'

{
  "openapi": "3.1.0",
  "paths": {
    "/wms/returns": {
      "post": {
        "requestBody": {
          "content": {
            "application/json": {
              "schema": {
                "$ref": "#/components/schemas/CreatewmsReturnOngoingSchema"
              }
            }
          }
        },
        "responses": {
          "200": {
            "description": "Create WMS Return output"
          }
        }
      }
    }
  },
  "components": {
    "schemas": {
      "CreatewmsReturnOngoingSchema": {
        "type": "object",
        "properties": {
          "return_number": {
            "type": "string",
            "description": "Return number"
          },
          "order_id": {
            "type": "string",
            "description": "The ID of the order that the return is associated with. Can be passed into the [Order](/api-reference/wms-api/orders/get-item) endpoint for more details.",
            "example": "order_id"
          },
          "warehouse_id": {
            "type": "string",
            "description": "The ID of the warehouse receiving the return. Can be passed into the [Warehouse](/api-reference/wms-api/warehouses/get-item) endpoint for more details.",
            "example": "warehouse"
          },
          "line_items": {
            "type": "array",
            "description": "A list of inventory items included in the return.",
            "example": [
              {
                "sku": "TEST-SKU",
                "expected_quantity": 1,
                "return_cause": null
              }
            ],
            "items": {
              "$ref": "#/components/schemas/WmsReturnWriteLineItemongoing"
            }
          },
          "tracking_number": {
            "type": "string",
            "description": ""
          },
          "tracking_url": {
            "type": "string",
            "description": ""
          },
          "trackstar_tags": {
            "type": [
              "array",
              "null"
            ],
            "description": "A list of custom tags associated with the resource. A tag can be either a string or a dictionary with one key-value pair.",
            "example": [
              "tag1",
              "tag2",
              {
                "tag3": "value3"
              }
            ],
            "items": {}
          }
        },
        "required": [
          "line_items",
          "order_id",
          "return_number"
        ],
        "additionalProperties": false,
        "title": "CreatewmsReturnOngoingSchema"
      },
      "WmsReturnWriteLineItemongoing": {
        "type": "object",
        "properties": {
          "sku": {
            "type": "string",
            "description": ""
          },
          "expected_quantity": {
            "type": "integer",
            "description": "",
            "example": 0
          },
          "return_cause": {
            "$ref": "#/components/schemas/ReturnCause"
          }
        },
        "required": [
          "expected_quantity",
          "sku"
        ],
        "additionalProperties": false,
        "title": "WmsReturnWriteLineItemongoing"
      },
      "ReturnCause": {
        "type": "object",
        "properties": {
          "code": {
            "type": "string",
            "enum": [
              "1",
              "13",
              "3"
            ],
            "description": "The reason code for this return."
          },
          "return_reason": {
            "type": [
              "string",
              "null"
            ],
            "enum": [
              "damaged",
              "wrong size",
              "no longer needed"
            ],
            "description": "The reason description for this return."
          }
        },
        "required": [
          "code"
        ],
        "additionalProperties": false,
        "title": "ReturnCause"
      }
    }
  }
}