Legacy stock integrations bypassing Magento’s service layer: fix or leave?
Older integrations often write inventory directly. Migrating blindly to newer APIs can change behaviour — understand and test existing stock semantics first.
Older integrations often write inventory directly. Migrating blindly to newer APIs can change behaviour — understand and test existing stock semantics first.
A legacy integration wrote inventory directly. Before touching it, we documented its exact stock behaviour so any move to newer APIs wouldn’t silently change availability rules.
Why direct writes exist
Many integrations were written for speed or before Multi-Source Inventory. They work, but skip Magento’s events and validation.
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- Different handling of reservations and salable quantity
- Backorder and stock status rules changing
- Performance differences at volume
- Events triggering other extensions unexpectedly
A safe path
Capture current behaviour with test cases, migrate in a staging environment, compare results SKU by SKU and roll out gradually.
Common mistakes to avoid
How we help with development
Frequently asked questions
Should we always use the Inventory API?
Usually for new work — but migrate existing integrations only with tests.
What is salable quantity?
Physical quantity minus reservations for unshipped orders in MSI.
Can you take over our integration?
Yes — we audit it first.