Overview

Amazon's Multi-Location Inventory (MLI) feature allows Fulfilled by Merchant (FBM) sellers to share inventory data across multiple warehouse or fulfillment locations directly within Seller Central. By providing location-level inventory details, sellers can unlock faster, more accurate delivery promises for customers — which can translate into improved Buy Box eligibility and higher conversion rates.

Key Points / What Sellers Need to Know

• Available to all FBM sellers — Whether you operate from a single location or manage inventory across dozens of warehouses, MLI is accessible to any merchant-fulfilled seller.
• Multiple integration methods — Sellers can connect their inventory data via SP-API, Amazon's inventory API, feed file uploads in Seller Central, or through third-party multi-channel integrators.
• Add as many ASINs as you want — Amazon recommends syncing all of your ASINs to get the full benefits of MLI, but sellers can start with a subset and expand over time.
• Works with Shipping Settings Automation (SSA) — MLI is designed to pair with SSA, which automatically calculates transit times and delivery promises based on your actual fulfillment locations.
• Up to 10 shipping locations per template — Shipping templates that use MLI are currently limited to 10 locations, though sellers can create multiple templates as needed.

How to Set Up Multi-Location Inventory

Getting started with MLI involves a few key steps. First, sellers need to create and manage their fulfillment locations, which can be done either through the SP-API integration or directly in Seller Central. Amazon's API documentation refers to these locations as supply sources or S2s. Once locations are configured, sellers must provide their location-level inventory — that is, how much stock of each SKU is available at each specific warehouse. This can be done through four methods: the SP-API, Amazon's inventory API, uploading a feed file in Seller Central, or managing inventory directly within the Seller Central interface. One critical requirement for first-time setup is that sellers must zero out their default fulfillment channel inventory for any SKUs that are being transitioned to location-level inventory management. This prevents double-counting and ensures Amazon reads from the correct inventory source.