DIY Developer Guide: Building Custom Integrations for SanMar
A step-by-step guide to building custom integrations with SanMar's product catalog and order management APIs for promotional products businesses.
Overview
SanMar is one of the largest suppliers of blank apparel and promotional products in North America. This guide provides a structured framework for building custom integrations with SanMar's product catalog, inventory, and order management systems.
Prerequisites
- SanMar API credentials (Customer Number, API Key)
- Familiarity with RESTful APIs, SOAP/XML services, and JSON data structures
- Tools: Postman, SanMar API Documentation, SDKs (Python, Node.js)
Step 1: Authentication
SanMar uses API Key authentication with customer-specific credentials. All API calls must be made over HTTPS with proper credential headers.
Step 2: Endpoint Discovery and Data Mapping
Common API Resources: Product Catalog, Inventory Levels, Orders, Shipments, Pricing.
Map SanMar product identifiers (style numbers, colors, sizes) to your internal catalog structure.
Step 3: Building Integration Flows
- Inbound (to SanMar): Submit purchase orders, check inventory availability
- Outbound (from SanMar): Retrieve product catalogs, pricing updates, shipment tracking
Step 4: Error Handling and Rate Limiting
Implement retry logic with exponential backoff. Handle authentication failures gracefully. Log all API errors for debugging.
Step 5: Security Best Practices
- Store API credentials in secure vaults
- Enforce TLS for all API traffic
- Use least-privilege access for API roles
- Rotate credentials periodically
Step 6: Testing and Validation
- Test against SanMar sandbox environments
- Validate product catalog sync accuracy
- Verify order submission and tracking workflows
Step 7: Deployment and Monitoring
- Deploy with automated CI/CD pipelines
- Monitor API performance and error rates
- Alert on order failures and inventory discrepancies
When to Use a Managed Platform
For businesses managing high-volume promotional product orders across multiple suppliers, a managed integration platform like APIWORX eliminates the operational burden of maintaining custom integrations.
