Amazon Marketplace API Integration
Production-ready listing management system using Amazon SP-API with real-time per-SKU updates, bulk feeds, LWA auth, SigV4 signing, and comprehensive throttling & retry logic
Feature Overview
Core capabilities and future enhancements for Amazon SP-API integration
Must-Have (MVP)
- LWA (Login with Amazon) token refresh flow
- SigV4 request signing for SP-API calls
- Real-time per-SKU listing updates (Listings API)
- Bulk feed submission (Feeds API - JSON_LISTINGS_FEED)
- Offer/price and inventory management
- Async job queue with retry logic
- Throttling detection (429) and exponential backoff
- Processing report parsing and error handling
Nice-to-Have (Later)
- Multi-marketplace support (US, CA, EU)
- Validation engine (product type attributes)
- Template library for common categories
- Seller performance metrics dashboard
- Content policy compliance checks
- FBA/FBM inventory sync
- Scheduled sync jobs
- Webhook integration for status updates
System Architecture
Six-tier architecture for production-ready Amazon listing management
Admin Portal (React)
Create drafts, manage SKUs, submit publish jobs, view processing status and errors
Listing Service API
Validates payloads, maps to Amazon schemas, manages draft lifecycle
SP-API Integration Service
LWA token refresh, SigV4 signing, throttling logic, error normalization
Async Workers + Queue
Reliable job processing with exponential backoff, DLQ for failures
Storage Layer
Sellers, Marketplaces, Listings, Offers, Inventory, PublishAttempts tables
Observability
Structured logs with trace IDs, metrics (success rate, throttles, latency)
Publishing Flows
Two integration patterns: real-time per-SKU updates and bulk feed processing
Real-Time Per-SKU (Listings API)
Best for <50 SKUs or interactive updates with immediate validation feedback
Bulk Feed Processing (Feeds API)
Best for thousands of SKUs or scheduled catalog syncs with batch processing
Security & Compliance
Production-grade security controls for Amazon SP-API integration
LWA Token Management
Login with Amazon access tokens (~1 hour expiry) generated from encrypted refresh tokens
- Store refresh tokens in KMS/Secrets Manager
- Auto-refresh before expiry
- Per-seller token isolation
SigV4 Request Signing
AWS signature version 4 signing for all SP-API requests with IAM credentials
- Least privilege IAM roles
- Separate dev/stage/prod keys
- Request signing wrapper
Throttling & Retry Logic
Client-side rate limiting and exponential backoff for 429/5xx responses
- Token bucket limiter per seller
- Exponential backoff with jitter
- Read x-amzn-RateLimit headers
Idempotency
Prevent duplicate listing creations with idempotency keys and attempt tracking
- UUID per publish attempt
- Hash request payload
- Track retry count in DB
Validation Gates
Pre-flight checks before calling SP-API to reduce errors and improve success rate
- Validate product type attributes
- Check marketplace rules
- Content policy compliance
Error Handling
Comprehensive error capture with field-level messages and processing report parsing
- Parse validation errors
- Dead-letter queue for failures
- Structured error logs
Key Benefits
Why choose this Amazon SP-API integration architecture
Real-Time + Bulk Options
Choose per-SKU Listings API for interactive updates or Feeds API for thousands of SKUs
Production-Grade Security
LWA token management, SigV4 signing, encrypted refresh tokens, and IAM least privilege
Multi-Marketplace Support
Manage listings across US, Canada, EU, and other Amazon marketplaces from one system
Reliable Processing
Async job queue with exponential backoff, retry logic, and dead-letter queue for failures
Validation & Compliance
Pre-flight validation gates for product types, marketplace rules, and content policies
Observability
Structured logs with trace IDs, metrics for success rate, throttles, latency, and backlog
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