Magento Inventory

Magento Inventory Management (REST)

Magento 2.3+ uses Multi-Source Inventory (MSI). The correct salable quantity for a customer is the salable qty (reservations-aware), not the raw source qty.

Configuration

• Base: ${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/
• Auth: Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}

---

Inventory Concepts

| Concept | Meaning | Endpoint | |---------|---------|----------| | Salable qty | What can be sold (raw qty minus open reservations) | /V1/inventory/get-product-salable-qty/{sku}/{stockId} | | Source item qty | Physical quantity at a source warehouse | /V1/inventory/source-items | | Stock | Logical grouping of sources assigned to a sales channel | /V1/inventory/stocks | | Source | Physical warehouse/location | /V1/inventory/sources | | Stock ID | Default stock = 1. Multi-stock stores have higher IDs | /V1/inventory/stocks |

Rule of thumb: Always check salable qty for "can this be sold?" questions. Check source items for "where is it physically?" questions.

---

Operation 1: Get Salable Quantity (MSI)

The authoritative "is this product available?" check. stockId=1 is the default stock.

Preferred endpoint — returns numeric quantity:

curl -s "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/get-product-salable-qty/${SKU}/1" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json"

Response is a number (float): 42.0

If the above returns "Request does not match any route" — the MSI salable-qty API is not enabled on this store. Use these fallbacks:

# Boolean check: is the SKU currently salable?
curl -s "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/is-product-salable/${SKU}/1" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}"
# Response: true or false

# Physical qty per source (always available when MSI is enabled):
curl -s -g "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/source-items?searchCriteria[filterGroups][0][filters][0][field]=sku&searchCriteria[filterGroups][0][filters][0][value]=${SKU}&searchCriteria[filterGroups][0][filters][0][conditionType]=eq" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" | jq '.items[] | {source_code, quantity, status}'

If all MSI endpoints fail, fall back to legacy stock (Op 3 below).

Multiple SKUs: Run in parallel or loop:

for sku in WS03-XS-Red WS08-XS-Blue MH01-XS-Black; do
  qty=$(curl -s "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/get-product-salable-qty/${sku}/1" \
    -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}")
  echo "$sku: $qty"
done

---

Operation 2: Get Source Items (Physical Stock per Warehouse)

curl -s -g "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/source-items?searchCriteria[filterGroups][0][filters][0][field]=sku&searchCriteria[filterGroups][0][filters][0][value]=${SKU}&searchCriteria[filterGroups][0][filters][0][conditionType]=eq" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json"

Extract from each item: sku, source_code, quantity, status (1=in stock, 0=out of stock)

Browse all sources:

curl -s -g "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/sources?searchCriteria[pageSize]=50" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json"

---

Operation 3: Get Legacy Stock Item (Single-Source / Simple Check)

For stores not using MSI, or for a quick stock status check:

curl -s "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/stockItems/${SKU}" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json"

Extract: qty, is_in_stock, min_qty, backorders, manage_stock

---

Operation 4: Update Source Item Quantity (Write — Confirm First)

Confirm: "I'll set SKU ${SKU} quantity to ${QTY} at source ${SOURCE_CODE}. Confirm? (yes/no)"

curl -s -X POST "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/source-items" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '{
    "sourceItems": [
      {
        "sku": "WS03-XS-Red",
        "source_code": "default",
        "quantity": 50,
        "status": 1
      }
    ]
  }'

• status: 1 = in stock, status: 0 = out of stock
• source_code: "default" is the standard single-source code. Check /V1/inventory/sources if unsure.
• Multiple items can be sent in one call by adding more objects to sourceItems.

Response: HTTP 200 with empty body on success.

---

Operation 5: Bulk Inventory Update (Async — Confirm First)

For updating many SKUs at once. Uses Magento's async bulk API — returns a bulk_uuid immediately, processes in background.

Confirm: "I'll bulk-update inventory for X SKU(s) — this will overwrite existing quantities at the specified sources. Confirm? (yes/no)"

curl -s -X POST "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/async/bulk/V1/inventory/source-items" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json" \
  -d '[
    {"sourceItems": [{"sku": "WS03-XS-Red", "source_code": "default", "quantity": 50, "status": 1}]},
    {"sourceItems": [{"sku": "WS08-XS-Blue", "source_code": "default", "quantity": 30, "status": 1}]},
    {"sourceItems": [{"sku": "MH01-XS-Black", "source_code": "default", "quantity": 0, "status": 0}]}
  ]'

Response includes bulk_uuid — save it to check status.

---

Operation 6: Check Bulk Job Status

curl -s "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/bulk/${BULK_UUID}/status" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json"

Extract: operations_list[].status (4=complete, 1=open, 2=completewitherrors, 3=retriably_failed, 5=rejected)

Detailed per-operation status:

curl -s "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/bulk/${BULK_UUID}/detailed-status" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json"

Polling: Check every 5-10 seconds. A bulk job of 100 items typically completes in 10-30 seconds.

---

Operation 7: List Stocks and Sources

# All stocks
curl -s -g "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/stocks?searchCriteria[pageSize]=50" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json"

# All sources with their codes
curl -s -g "${MAGENTO_BASE_URL}/rest/${MAGENTO_STORE_CODE:-default}/V1/inventory/sources?searchCriteria[pageSize]=50" \
  -H "Authorization: Bearer ${MAGENTO_ADMIN_TOKEN}" \
  -H "Content-Type: application/json"

---

Response Formatting

Salable qty check:

WS03-XS-Red: 42 available (salable)
WS08-XS-Blue: 0 available (out of stock)

Source items:

WS03-XS-Red inventory:
  default warehouse: 50 units (in stock)
  east-coast: 12 units (in stock)

Bulk update started:

Bulk job submitted. UUID: abc123...
Run /magento-inventory bulk_uuid=abc123 to check status.

---

Error Handling

• HTTP 404 on /V1/inventory/get-product-salable-qty: SKU not found, or MSI not enabled. Fall back to /V1/stockItems/{sku}.
• HTTP 404 on /rest/async/bulk/: Async API may not be available on older Magento versions.
• source_code unknown: Run sources list first to find valid codes.
• status field missing in update: Always include status explicitly — omitting it may leave status unchanged.

---

Decision Table

| User says | Action | |-----------|--------| | "how many [sku] in stock?" | Salable qty (Op 1) | | "is [sku] available?" | Salable qty (Op 1) | | "stock at each warehouse for [sku]" | Source items (Op 2) | | "set [sku] qty to N" | Confirm → update source item (Op 4) | | "update inventory for these SKUs: ..." | Confirm → bulk update (Op 5) | | "check bulk job [uuid]" | Bulk status (Op 6) | | "what warehouses/sources exist?" | List sources (Op 7) |

User Request

$ARGUMENTS

Source & license

This open-source skill is cataloged on AgentStack and links to its original source — we do not rehost the code.

• Author: magendooro
• Source: magendooro/magento-claude-skills
• License: MIT

Install and usage instructions live in the source repository linked above.