Marketplace Connectors One inventory truth across every channel you sell on.
Unified data connectors for Amazon, Shopify, Walmart, and other global retailers. Delivered by our Custom Ecommerce Tools team in 3 to 10 weeks. USD pricing.
Part of our Custom Ecommerce Tools practice — see related capabilities below.
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Who we've built for.
How we work
- Focus
- Marketplace Connectors
- Stack
- Amazon SP-API · Shopify Admin API · Node.js · PostgreSQL · Redis · AWS Lambda · EventBridge
- Integrations
- Amazon · Shopify · Walmart · eBay · NetSuite · Xero · QuickBooks · 3PL WMS systems
- Typical timeline
- 3 to 10 weeks
- Compliance
- Amazon SP-API compliance · PCI-aware payment flows · GDPR for EU storefronts
We build marketplace connectors that unify inventory, orders, and pricing across Amazon, Shopify, Walmart, eBay, and custom channels. Conflict resolution, error monitoring, and audit logs for ops teams.
Recent ecommerce builds
From 24-hour data delays to 15-minute real-time analytics for 500+ Amazon sellers
Read case study →
1.6B EAN product API, Next.js dashboard, Amazon/Walmart Chrome extension with Keepa charts
Read case study →
App Store-approved Shopify app, abandoned cart dashboard, revenue calculator & email automation
Read case study →
Amazon competitor price graphs per listing, pattern insights & Gemini AI forecasts for proactive repricing
Read case study →What we deliver — Marketplace Connectors
Multi-channel inventory sync
Real-time stock updates with oversell protection and buffer rules per channel.
Order aggregation hub
Central order inbox routing fulfillment to 3PL, FBA, or in-house.
Pricing and listing sync
Unified product catalog with channel-specific pricing and attribute mapping.
Returns and refund routing
Cross-channel return workflows synced back to your ERP.
Connector monitoring dashboard
Sync status, error queues, and manual override tools for ops teams.
Custom marketplace adapters
API integrations for niche B2B marketplaces and distributor portals.
Capability detail: Custom Ecommerce Tools, Amazon SP API Development, Shopify API & App Development, Inventory & Order Automation.
Typical engagement ranges
Single-channel tool
From $4,000
- One marketplace or store integration.
- Reporting or automation scope.
- Typical 3 to 5 weeks.
Multi-channel connector
From $9,500
- Inventory and order sync across channels.
- Error handling and monitoring.
- Typical 5 to 8 weeks.
Commerce platform build
From $21,000
- Custom ops dashboard or SaaS tool.
- Multiple integrations and roles.
- Typical 8 to 14 weeks.
FAQ
Amazon SP-API, Shopify, Walmart Marketplace, eBay, and custom B2B portals. New channels added via adapter pattern.
Atomic inventory reservations, buffer stock per channel, and reconciliation jobs that catch drift.
Both — AWS Lambda, dedicated servers, or your VPC depending on data residency and volume.
Maintenance retainers cover API version updates, monitoring, and fix deployment within SLA.