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An open source standard for global shipping

Standards Recommendations


The recommendation for location codes is to use UN/LOCODE. Other codes can be used, but must be specified in the request. Additionally, the UN/LOCODE version should be specified in the same object as the code.


The recommendation for terminals is to use SMDG codes. Non-existent codes can be requested through the SMDG website. Additionally, custom codes can be used as needed, but will be integration specific. If there is no standard field, the terminal_code will be considered custom.



The recommendation for currency is to use ISO 4217 codes. All currency representations should be an object, with both the currency code and the amount included as attributes.


Dates and Times

Dates and times should be represented using the ISO 8601 standard format.



Container sizes and types should use the ISO 6346 standard codes. Any TEU conversions for containers are considered to be system specific, unless otherwise specified in a custom integration.



Charge objects should consist of the following fields:

  1. The amount, represented using the standard currency object
  2. An integration specific charge code
  3. A short description
  4. An extended description
  5. A unit of measure object, with up to 3 attributes
  6. The pay party based on UN/CEFACT Supply Chain Reference Data Model
  7. A calculation method for the charge
  8. The date on which the charge should be calculated
  9. An object representing the UN/CEFACT freight cost code that represents the charge
      "amount": {
        "amount": 2.33,
        "currency": "USD"
      "short_description": "Handling",
      "extended_description", "Longer handling description",
      "unit_of_measure": {
        "primary_unit": "kg",
        "secondary_unit": "hour",
        "tertiary_unit": "day"
      "pay_party": "Shipper",
      "calculation_method": "Multiply container weight by transit days",
      "calculation_date": "2018-06-06T23:30:23+00:00",
      "un_freight_cost_code": {
        "group": 1,
        "subgroup": 1,
        "detail": 4

Equipment Charges

Equipment charges, regionally referred to as Equipment Free Time, Detention, Demurrage, and others, should be described as “Equipment Rental” and “Equipment Storage”.

Equipment rental is intended to mean when the equipment is in possession of the shipper. Equipment storage is intended to mean when the loaded container is in the care of the carrier at a place of receipt or place of delivery.

In the case that no distinction is drawn between the rental and storage (Combined Equipment Free Time), Equipment Rental should be used, and equipment storage should be omitted.

The required fields are:

  1. The maximum number of days the equipment can be rented or stored at the specified rate
  2. The day type: CALENDAR or BUSINESS
  3. The cost of the equipment rental or storage
    "days": 12,
    "day_type": "CALENDAR",
    "cost": {
        "amount": 2.33,
        "currency": "USD"