eCommerce API Features: Webhooks, Sync and More

API2Cart connects your software to 80+ eCommerce platforms through one unified API. These eCommerce API features take care of the hard parts of a multi-platform integration: real-time events and sync, one data model, scale and reliability, store connection and checkout. Each feature has its own page with how it works, an example request, use cases and answers to common questions.

Webhooks

Subscribe to store events and receive instant HTTP callbacks when orders are placed, products change or inventory updates, in one unified format.

Data & Sync

Real-Time Sync

Bidirectional, real-time sync of orders, products, inventory and customers: webhooks and polling combined in one sync layer.

Data & Sync

Data Normalization

Products, orders, customers and more from every platform in a single, consistent and predictable JSON format.

Data & Sync

Custom Field Mapping

Shopify metafields, WooCommerce custom attributes, Magento EAV attributes and other custom fields through the additional_fields mechanism.

Data & Sync

Multi-Store Management

One store or 10,000: each store gets its own store_key, with the same methods and the same data format on every platform.

Scale & Reliability

Bulk Operations

Update thousands of products, sync large catalogs and process orders in bulk with batch-aware calls and async processing.

Scale & Reliability

Rate Limit Handling

The limits of every platform handled for you: automatic throttling, retries with exponential backoff and queuing when needed.

Scale & Reliability

Error Handling

Platform-specific errors normalized into one consistent return_code and return_message, so you write your error handling once.

Scale & Reliability

Branded Plugin

A connection plugin with your own name, description and logo: store owners connect in one click without sharing FTP credentials.

Store Connection & Checkout

Live Shipping Rates

Plug your own real-time rate calculation into a merchant's checkout on Shopify, WooCommerce, Magento, PrestaShop and more.

Store Connection & Checkout

Webhooks

Subscribe to store events and receive instant HTTP callbacks when orders are placed, products change or inventory updates, in one unified format.

Data & Sync

Real-Time Sync

Bidirectional, real-time sync of orders, products, inventory and customers: webhooks and polling combined in one sync layer.

Data & Sync

Data Normalization

Products, orders, customers and more from every platform in a single, consistent and predictable JSON format.

Data & Sync

Custom Field Mapping

Shopify metafields, WooCommerce custom attributes, Magento EAV attributes and other custom fields through the additional_fields mechanism.

Data & Sync

Multi-Store Management

One store or 10,000: each store gets its own store_key, with the same methods and the same data format on every platform.

Scale & Reliability

Bulk Operations

Update thousands of products, sync large catalogs and process orders in bulk with batch-aware calls and async processing.

Scale & Reliability

Rate Limit Handling

The limits of every platform handled for you: automatic throttling, retries with exponential backoff and queuing when needed.

Scale & Reliability

Error Handling

Platform-specific errors normalized into one consistent return_code and return_message, so you write your error handling once.

Scale & Reliability

Branded Plugin

A connection plugin with your own name, description and logo: store owners connect in one click without sharing FTP credentials.

Store Connection & Checkout

Live Shipping Rates

Plug your own real-time rate calculation into a merchant's checkout on Shopify, WooCommerce, Magento, PrestaShop and more.

Store Connection & Checkout

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