Zero Delay Bidirectional Sync
Propagates pricing and stock data back-and-forth between sheets and active channels in seconds, removing manual import/export steps.
API Integration & Automation
Google Sheets MarketplaceAPI Synchronization
An automated synchronization engine connecting Google Sheets directly with marketplace APIs (Amazon SP-API, eBay, etc.) for real-time inventory and pricing management.
Connect Marketplace10M+ Items
Items Synced
<5s Sync
Sync Latency
100.0%
Sync Accuracy
Overview
Project Overview
An enterprise-grade solution that connects Google Sheets directly with marketplace APIs, enabling merchants to manage bulk changes (price, stock, details) inside Google Sheets. The synchronization engine monitors sheet edits, validates structural data, and calls Amazon SP-API and other marketplace endpoints with built-in rate-limiting compliance. It handles secure OAuth 2.0 multi-account seller auth, processes updates in queues, and updates sheet status rows upon completion.
Key Challenges
- Handling Google Sheets API write quota limits (100 operations per 100 seconds) and function execution timeouts.
- Resolving bidirectional synchronization concurrency conflicts when listings are modified on both the sheet and the marketplace simultaneously.
- Formulating a secure OAuth 2.0 credential storage schema that supports multiple independent sellers without cross-access leaks.
Our Solutions
- Implemented a highly optimized task-queue worker in Node.js that batches updates and throttles execution based on API rate limits.
- Designed a semantic change-detection system using row-level checksums that avoids sending redundant data updates.
- Encrypted marketplace login details and credentials using AWS KMS Key Management and handled automatic OAuth token refresh cycles.
Results
99.98% synchronization success rate without triggering API rate-limit violations.Over 10 million inventory and catalog items synchronized dynamically.Reduced manual back-office listing updates by an average of 25+ hours per week per merchant.
See related case studies and solutions.
Value
Key Differentiators & Client Value
What sets this solution apart for our clients.
Enterprise Grade Credentials Encryption
Uses industry-standard AES-256-GCM encryption with AWS KMS management to protect seller tokens and keys.
Automatic Conflict Resolution
Monitors timestamp mismatches and automatically highlights merge conflicts on the sheet with visual comments.
Functionality
Dynamic Synchronization Workflow
1. Sheet Listener and Script Automation
Seamless background event triggers:
- OnEdit triggers catch cell updates in real-time
- Automatic data serialization into JSON structures
- Color-coded execution status cells (Queued, Syncing, Success, Error)
- Self-healing trigger recovery on network failure
Ensures spreadsheet changes are queued up automatically.
2. API Gateway Sync Engine
Robust backend message handling:
Queue Management & Throttling
- • Dynamically respects Amazon SP-API and eBay rate limits.
- • Executes retry loops with exponential backoff on server throttle codes (HTTP 429).
Authentication Token Lifecycle
- • Decrypts seller tokens in-memory using HSM-based encryption keys.
- • Automates refresh token exchange before access token expiration.
Technology
Technology Stack
Built with secure, cloud-scale components that bridge the responsiveness of spreadsheets with high-volume marketplace REST APIs.
Direct Sheet-to-Marketplace Automation
Connect your inventory spreadsheets directly with your selling accounts and remove manual uploads forever.