Get Unit of Measure Codes

Returns unit of measure code enumeration per UN/ECE Recommendation 20 (with Rec 21 extension). Used in UBL 2.1 as InvoicedQuantity/@unitCode (IBT-130). The API supports the complete code list (thousands of codes).

Usage in document payloads

Send the code as a plain string on each document line — not an object with code/desc:

"document_lines": [
  {
    "name": "Sample Item",
    "quantity": 2.0,
    "unit_code": "EA",
    "price": { "base_amount": 100.0, "base_quantity": 1.0 },
    "classified_tax_category": { "id": "S", "percent": 5.0, "tax_scheme": "VAT" }
  }
]

Use document_lines[].unit_code when creating or updating:

• Sale invoices

• Sale credit notes

• Purchase invoices

• Purchase credit notes

Common codes

Call this endpoint for the full list of valid codes. Invalid values are rejected at validation.

See the right panel for request, response, and JSON examples.