What can you do with Squarespace Commerce APIs?
Squarespace is often seen as a simple website builder, but once you start using Commerce APIs, it becomes a real commerce platform that can integrate with your internal tools, external services, and custom workflows.
Squarespace Commerce APIs allow you to read and manage commerce data such as products, inventory, orders, transactions, and event-driven notifications. This opens the door to building real systems around a Squarespace store—not just managing everything manually in the dashboard.
The main Commerce API areas (and what they enable)
Orders API: automation, fulfillment, and syncing
The Orders API is the backbone of most serious integrations.
With it, you can:
Retrieve orders, including one-time purchases and recurring subscription orders
Mark orders as fulfilled and trigger shipment notifications
Import orders from external sales channels into Squarespace
Filter and paginate large order histories for reporting or syncing
What this enables:
Sending new orders to fulfillment or warehouse systems
Building internal order dashboards for teams
Consolidating sales data from multiple channels into one system
Inventory API: real-time stock synchronization
Inventory in Squarespace is handled at the product variant level.
Using the Inventory API, you can:
Read current stock levels
Update inventory quantities programmatically
Handle tracked and untracked inventory properly
What this enables:
Preventing overselling across multiple sales channels
Syncing inventory from ERP or warehouse systems
Adjusting stock automatically after refunds or cancellations
Products API: programmatic product management
The Products API allows you to manage your catalog outside the Squarespace UI.
You can:
Create, update, delete, and retrieve products
Manage product variants, pricing, and images
Work with different product types such as physical products, services, or digital goods
What this enables:
Bulk product management and automation
Syncing a master product database into Squarespace
Building internal tools for safe catalog updates and approvals
Transactions API: financial visibility and reconciliation
Orders show what was sold. Transactions show what actually happened financially.
With the Transactions API, you can:
Retrieve payment and donation transactions
Filter transactions by date ranges
Build financial reporting workflows
What this enables:
Accounting and reconciliation dashboards
Payment failure tracking
Financial data exports to accounting or BI tools
Webhooks: event-driven automation
Webhooks let your systems react instantly when something happens in Squarespace.
You can subscribe to events such as:
Order creation
Order updates
Fulfillment changes
What this enables:
Real-time notifications to Slack or internal tools
Triggering automations without polling the API
Keeping systems in sync efficiently and reliably
Authentication: API keys vs OAuth
Squarespace supports two main authentication methods:
API keys for internal tools and private integrations
OAuth for public or distributable apps
Permissions are granular, so you can restrict access to read-only or read/write depending on your use case. OAuth is required if you plan to build a Squarespace Extension or public app.
Rate limits you must design around
Commerce APIs enforce rate limits to protect platform stability.
In practice, this means:
You should avoid constant polling
Prefer webhooks for event-based workflows
Sync data incrementally instead of re-fetching everything
Designing with rate limits in mind is a sign of a production-ready integration.
A practical build order for real integrations
If you’re building a serious integration, a safe approach is:
Authenticate and identify the connected site
Set up webhooks for order events
Sync orders incrementally
Keep inventory in sync to prevent overselling
Automate product updates only if truly needed
Pull transactions for finance and reporting
This approach keeps systems reliable and avoids unnecessary complexity.
The big takeaway
Squarespace Commerce APIs are not about changing how a site looks.
They are about:
automating operations,
integrating external systems,
reducing manual work,
and turning a Squarespace store into a connected commerce backend.
Once your business outgrows “just using the dashboard,” Commerce APIs are how Squarespace scales with you.