DIY Developer Guide: Building Custom Integrations for Zulily
A guide to building custom integrations with Zulily's vendor portal and EDI systems for flash sale and marketplace operations.

Overview
Zulily is a flash-sale marketplace focused on mothers, babies, and children's products. This guide covers building custom integrations for vendor operations including order management, inventory feeds, and shipment confirmations.
Prerequisites
- Zulily Vendor Portal access and EDI credentials
- Familiarity with EDI standards (850, 856, 810), SFTP, and CSV/XML data formats
- Tools: EDI translators, SFTP clients, Zulily Vendor Documentation
Step 1: Authentication
Zulily vendor integrations typically use SFTP with SSH keys or EDI VAN connections. Set up secure file transfer credentials through the vendor portal.
Step 2: Endpoint Discovery and Data Mapping
Common Data Feeds: Purchase Orders (EDI 850), Advance Ship Notices (EDI 856), Invoices (EDI 810), Inventory Feeds.
Map Zulily SKUs and event IDs to your internal catalog structure.
Step 3: Building Integration Flows
- Inbound (from Zulily): Receive purchase orders, event schedules, return authorizations
- Outbound (to Zulily): Submit inventory feeds, shipment confirmations, invoices
Step 4: Error Handling and Retry Logic
Handle file transfer failures, EDI validation errors, and data format mismatches. Implement automated retry with alerting.
Step 5: Security Best Practices
- Use SSH key authentication for SFTP
- Encrypt all data files in transit
- Implement file integrity validation
- Monitor for unauthorized access
Step 6: Testing and Validation
- Test EDI document exchange with Zulily test environment
- Validate purchase order parsing accuracy
- Verify shipment confirmation workflows
Step 7: Deployment and Monitoring
- Monitor file transfer success rates
- Alert on EDI validation failures
- Track order fulfillment SLAs
When to Use a Managed Platform
For vendors managing multiple marketplace integrations alongside Zulily, a managed integration platform like APIWORX provides unified marketplace orchestration.

