Transfer inventory between locations -- single or multi-item atomic

ATOMIC-CREATE (2026-05-12): accepts items[] for multi-line atomic transfers OR top-level product_id/quantity for single-item compat mode. All items transfer in one DB transaction; any failure rolls back all items (no partial writes). Inter-location transfer. Writes transfer_out + transfer_in ledger rows per item. Intra-entity: no GL. Intercompany: posts Due From / Due To GL entries. Field names: source_location_id (or from_location_id) and dest_location_id (or to_location_id) are accepted aliases. entity_from_id is injected from API key entity_id; do not supply in request body.

POST /inventory/transfers

cURL

multi_item_transfer

curl --request POST \
  --url https://api.arcuserp.com/v1/inventory/transfers \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "source_location_id": "91aa7588-4dc7-4edd-b172-7de91f5e1f78",
  "dest_location_id": "828cabe6-3fa2-4fb7-a2af-2280bbaba335",
  "notes": "Weekly replenishment transfer to secondary warehouse",
  "items": [
    {
      "product_id": "7f6f3e14-eaad-4c45-b922-209f6dc6d140",
      "quantity": 5,
      "notes": "Circuit Breaker 10A White"
    },
    {
      "product_id": "ec9288c3-12b1-474f-bb09-b0b15bb7a8ff",
      "quantity": 3,
      "notes": "Square D Breaker Black"
    }
  ]
}
'

201

{
  "data": {
    "id": "e1ce42dc-e9ae-40c4-a923-aa93100b0947",
    "entity_from_id": "65dcd234-53c3-4f54-b772-ee349528d497",
    "entity_to_id": "65dcd234-53c3-4f54-b772-ee349528d497",
    "location_from_id": "91aa7588-4dc7-4edd-b172-7de91f5e1f78",
    "location_to_id": "828cabe6-3fa2-4fb7-a2af-2280bbaba335",
    "transfer_number": "SB-TRF-0000001",
    "status": "draft",
    "transfer_type": "internal",
    "notes": "Weekly replenishment transfer to secondary warehouse",
    "gl_posted": false,
    "availability_warnings": [],
    "items": [
      {
        "id": "d8c6bb7a-9c4c-446a-8518-d6f9398dbedc",
        "transfer_id": "e1ce42dc-e9ae-40c4-a923-aa93100b0947",
        "product_id": "7f6f3e14-eaad-4c45-b922-209f6dc6d140",
        "quantity_sent": "5.0000",
        "quantity_received": "0.0000",
        "notes": "Circuit Breaker 10A White"
      }
    ]
  }
}

Authorizations

Authorization · string · header · required

API key issued per entity via Settings > Developers > API Keys. Each key carries scopes (e.g. orders:read, products:write). Bearer token format: Authorization: Bearer ark_live_ent_Test keys use ark_test_ent_. Both are issued per entity
via Settings > Developers > API Keys.

Headers

Idempotency-Key · string

Client-generated unique key for idempotent POST/PATCH/DELETE operations. Alias for the Idempotency parameter. Max 255 chars. On retry with the same key, the original response is returned without re-executing the operation. Keys expire after 24 hours.

Maximum string length: 255

Body

application/json

Option 1

Option 2

Multi-item atomic mode

source_location_id · string<uuid> · required

Also accepted: from_location_id

dest_location_id · string<uuid> · required

Also accepted: to_location_id

items · object[] · required

Minimum array length: 1

Show child attributes

notes · string

Response

201

application/json

Transfer initiated (draft status; GL fires on submit). The data.availability_warnings array lists any line item whose requested quantity exceeds source-location availability at create time (warn-at-create, hard-block-at-ship; NetSuite/Acumatica transfer-order pattern). Draft creation is not blocked, but shipping a short line returns a 400 insufficient_stock. The array is empty when every item has enough on hand at the source.

object · enum<string>

Available options: inventory_transfer_result

data · object

Show child attributes