Walmart Marketplace + Amazon Marketplace
Sync Walmart Marketplace and Amazon Marketplace to Run a Smarter Multichannel Operation
Connect your two biggest retail channels and stop manually keeping inventory, pricing, and orders in sync.
Why integrate Walmart Marketplace and Amazon Marketplace?
Selling on both Walmart Marketplace and Amazon Marketplace puts you in front of hundreds of millions of shoppers — but running two platforms independently creates real operational headaches. When inventory updates, pricing changes, and order data live in separate silos, you end up overselling, publishing inconsistent listings, and burning hours on redundant manual work every day. Integrating Walmart Marketplace and Amazon Marketplace through tray.ai gives you a single source of truth that keeps both channels accurate, competitive, and profitable in real time.
Automate & integrate Walmart Marketplace & Amazon Marketplace
Use case
Real-Time Inventory Synchronization Across Both Marketplaces
When a product sells on Amazon, the available quantity needs to update on Walmart immediately — and vice versa — to prevent costly oversell events. tray.ai listens for inventory change events on both platforms and propagates updates in real time, so your stock levels stay accurate across every channel. This matters most during high-velocity sales periods like Prime Day or Walmart Deals events, where inventory can move within seconds.
Use case
Unified Order Routing and Fulfillment Management
Orders placed on Walmart and Amazon need to flow into the same fulfillment system — whether that's your 3PL, warehouse management platform, or an in-house shipping solution. tray.ai captures new orders from both marketplaces the moment they're placed and routes them through a standardized fulfillment workflow, normalizing the differences in order data structure between the two platforms. Your operations team gets one queue to work from instead of toggling between two seller portals.
Use case
Competitive Price Monitoring and Cross-Channel Repricing
Staying price-competitive on Amazon doesn't automatically make you competitive on Walmart, and manually auditing prices across both platforms falls apart at scale. tray.ai can monitor your Amazon pricing rules and automatically apply equivalent or strategically differentiated pricing to your Walmart listings, accounting for each platform's fee structures and margin requirements. You can also set up alerts when a competitor undercuts your price on either channel, triggering a repricing workflow before you lose ranking.
Use case
Product Catalog Expansion and Listing Syndication
When you add a new ASIN on Amazon, replicating that listing on Walmart Marketplace shouldn't mean starting from scratch. tray.ai can extract product data — titles, descriptions, images, attributes, and category mappings — from your Amazon listings and transform them into Walmart-compatible item feeds, accounting for the structural differences between the two catalogs. New products go live on your second channel in hours, not days.
Use case
Seller Performance Metrics Aggregation and Reporting
Monitoring your seller health on Amazon and Walmart separately means you never have a complete picture of your multichannel business. tray.ai pulls order defect rate, late shipment rate, cancellation rate, and customer feedback scores from both platforms on a scheduled basis and consolidates them into a single dashboard or data warehouse. Your team gets one view of seller health instead of two incomplete ones.
Use case
Automated Return and Refund Processing
Returns on Amazon follow different workflows and timelines than returns on Walmart, but both need to result in the same downstream actions: restocking decisions, refund issuance, and customer communication. tray.ai unifies return events from both marketplaces and routes them through a consistent post-purchase workflow, so resellable items get added back to available inventory on both channels and refunds go out promptly.
Use case
Promotional Campaign Synchronization
Running a sale on one marketplace while your other channel shows full price creates a confusing customer experience and leaves revenue on the table. tray.ai lets you define a promotional pricing event once and push coordinated price changes to both Walmart and Amazon listings at the same time, with automatic reversion to standard pricing when the promotion ends. Your brand looks consistent across both major retail touchpoints.
Get started with Walmart Marketplace & Amazon Marketplace integration today
Walmart Marketplace & Amazon Marketplace Challenges
What challenges are there when working with Walmart Marketplace & Amazon Marketplace and how will using Tray.ai help?
Challenge
Structural Differences Between Amazon and Walmart Product Catalogs
Amazon and Walmart use fundamentally different product taxonomy systems, attribute schemas, and item specification formats. A product that maps cleanly to an Amazon Browse Node may require completely different category attributes on Walmart, and fields that are optional on one platform may be mandatory on the other. Manually translating catalog data between the two breaks down quickly once you're past a small SKU count.
How Tray.ai Can Help:
tray.ai's data transformation layer lets you build reusable field mapping logic that translates Amazon catalog structures into Walmart item spec formats — and vice versa — automatically. You can define conditional logic to handle platform-specific required fields, apply default values where data is missing, and validate the transformed payload before submission to catch errors before they cause listing failures.
Challenge
API Rate Limits and High-Volume Order Throughput
Both the Amazon Selling Partner API and Walmart Marketplace API enforce rate limits that can throttle high-volume sellers during peak periods. When order volume spikes during major sales events, integrations that make one API call per event can quickly exhaust rate limit budgets, causing delays in order processing, inventory updates, and shipment confirmations at exactly the moments when speed matters most.
How Tray.ai Can Help:
tray.ai manages API rate limits by batching requests where the platform APIs support bulk operations, queuing events during throttle periods, and automatically retrying failed calls with exponential backoff. Your integration stays stable and compliant with both platforms' API policies even during Black Friday or Prime Day traffic spikes.
Challenge
SKU and Product Identifier Mapping Across Two Ecosystems
Amazon identifies products primarily by ASIN, while Walmart relies on WalmartItemIDs, UPCs, and GTINs. When the same physical product exists under different identifiers on each platform, keeping inventory, pricing, and fulfillment data in sync requires a reliable cross-reference mapping. Without it, an update on one platform can't reliably find and update the correct record on the other.
How Tray.ai Can Help:
tray.ai lets you maintain a persistent SKU-to-identifier mapping table — stored in a connected database or lookup service — that your workflows reference at runtime. Every inventory or pricing update automatically resolves the correct identifier for each platform before executing the API call, so updates always land on the right product record without manual cross-referencing.
Challenge
Order Status and Fulfillment Confirmation Latency
Amazon buyers expect shipment confirmations within 24 hours, and Walmart tracks late shipment rate as a seller metric. When orders from both channels flow through a shared fulfillment workflow, delays in confirming shipment back to the originating marketplace — particularly if a carrier API or warehouse system is slow — can damage seller performance scores on both platforms at once.
How Tray.ai Can Help:
tray.ai's event-driven architecture ensures that as soon as a shipment confirmation is available from your fulfillment system or carrier, it gets pushed back to both Amazon and Walmart via their respective shipping confirmation APIs. You can also configure proactive alerts if a shipment confirmation hasn't arrived within a defined SLA window, giving your team time to intervene before a late shipment gets recorded.
Challenge
Managing Platform-Specific Fee Structures in Pricing Logic
Amazon's referral fees and Walmart's commission rates differ by category and can meaningfully affect margin calculations. A price that works on Amazon may be unprofitable at the same level on Walmart, or vice versa. Without fee-aware pricing logic built into the integration, sellers either set uniform prices that sacrifice margin on one platform or manually calculate platform-specific prices — which breaks down as the catalog grows.
How Tray.ai Can Help:
tray.ai lets you embed fee calculation logic directly into your pricing workflows. You can configure category-level fee rates for both Amazon and Walmart, and the integration will automatically compute the minimum viable price for each platform before pushing updates. Every price change protects your margins on both channels without requiring manual margin calculations per SKU.
Start using our pre-built Walmart Marketplace & Amazon Marketplace templates today
Start from scratch or use one of our pre-built Walmart Marketplace & Amazon Marketplace templates to quickly solve your most common use cases.
Walmart Marketplace & Amazon Marketplace Templates
Find pre-built Walmart Marketplace & Amazon Marketplace solutions for common use cases
Template
Inventory Sync: Amazon to Walmart in Real Time
Automatically updates Walmart Marketplace inventory quantities whenever a sale, adjustment, or restock event occurs on Amazon, preventing overselling and keeping listings accurate across both channels.
Steps:
- Trigger: Detect inventory level change event on Amazon Marketplace via API polling or webhook
- Transform: Calculate new available quantity, adjusting for any Walmart-specific safety stock buffer
- Action: Push updated inventory quantity to the matching Walmart Marketplace item via SKU or UPC mapping
Connectors Used: Amazon Marketplace, Walmart Marketplace
Template
New Amazon Order to Unified Fulfillment Pipeline
Captures every new Amazon order and routes it into the same fulfillment workflow used for Walmart orders, normalizing order data so your warehouse or 3PL receives consistent, actionable instructions regardless of which channel originated the sale.
Steps:
- Trigger: New order received on Amazon Marketplace
- Transform: Normalize Amazon order schema to your internal fulfillment data model, resolving field differences with Walmart order structure
- Action: Route standardized order record to fulfillment system and update both marketplace order statuses as shipment progresses
Connectors Used: Amazon Marketplace, Walmart Marketplace
Template
New Walmart Listing Sync to Amazon Catalog
When a new item is added to your Walmart Marketplace catalog, this template extracts the product data and creates or updates the corresponding Amazon listing, mapping Walmart item spec fields to Amazon catalog attributes automatically.
Steps:
- Trigger: New item successfully created or approved on Walmart Marketplace
- Transform: Map Walmart item attributes (title, description, category, images, UPC) to Amazon Product Type and Browse Node requirements
- Action: Submit Amazon listing feed and monitor submission status, alerting on any data validation errors
Connectors Used: Walmart Marketplace, Amazon Marketplace
Template
Scheduled Seller Performance Report Aggregator
Pulls seller health metrics from both Amazon Seller Central and Walmart Seller Center on a weekly schedule and consolidates them into a single report delivered to your operations team via email, Slack, or a connected BI tool.
Steps:
- Trigger: Scheduled run every Monday morning
- Fetch: Pull order defect rate, late shipment rate, cancellation rate, and feedback scores from both Amazon and Walmart APIs
- Aggregate and Deliver: Merge metrics into a unified report template and send to configured Slack channel, email list, or data warehouse
Connectors Used: Amazon Marketplace, Walmart Marketplace
Template
Cross-Channel Promotional Pricing Coordinator
Applies coordinated promotional price changes to matching listings on both Walmart Marketplace and Amazon Marketplace simultaneously when a campaign is activated, then reverts to standard pricing automatically when the promotion window closes.
Steps:
- Trigger: Promotion record created or activated in your pricing tool or spreadsheet with campaign start and end times
- Action: Update sale price on Walmart Marketplace and Amazon Marketplace listings for all SKUs in the promotion scope
- Revert: At campaign end time, automatically restore original prices on both platforms and log promotion results
Connectors Used: Walmart Marketplace, Amazon Marketplace
Template
Return Event Processor and Inventory Reconciler
Listens for return and refund events on both Amazon and Walmart, processes the appropriate refund action, makes a restocking decision based on return reason, and updates available inventory on both platforms when a unit is deemed resellable.
Steps:
- Trigger: Return or refund event detected on either Amazon Marketplace or Walmart Marketplace
- Decision: Evaluate return reason code to determine if unit should be restocked, quarantined, or written off
- Action: If resellable, increment inventory on both marketplace channels and log the return record for financial reconciliation
Connectors Used: Amazon Marketplace, Walmart Marketplace