APIs let your Shopify store talk to other systems — accounting software, email marketing, inventory management, and more.
What Is the Shopify API?
The Shopify API (Application Programming Interface) allows external services to read and write your store data. Products, orders, customers, inventory, and analytics are all accessible through the API.
Common Integrations
Email marketing (Mailchimp, Klaviyo), accounting (QuickBooks, Xero), inventory (TradeGecko, Cin7), shipping (ShipStation, Shippo), and ERP systems all integrate via Shopify's API.
REST vs GraphQL
Shopify offers both REST and GraphQL APIs. REST is simpler and well-documented. GraphQL is more flexible and efficient for complex queries. New development should use GraphQL.
API Rate Limits
Shopify limits API requests to prevent abuse. REST allows 40 requests per second per app. GraphQL uses a credit-based system. Plan your integrations to stay within limits.
Webhooks
Webhooks notify your systems when events happen — new orders, product updates, customer creation. They eliminate the need for constant polling and keep data in sync in real time.
Security
Use API keys with minimum required permissions. Store credentials securely. Use OAuth for third-party app authentication. Regularly review API access.
API integration connects your Shopify store to your broader business systems. Done right, it saves hours of manual work.