Shopify Admin API
Shopify's Admin API (REST and GraphQL) for managing every aspect of a Shopify store: products, orders, customers, inventory, fulfillment, and more — the foundation for most Shopify app development.
BigCommerce API
Enterprise-grade hosted ecommerce platform with REST and GraphQL APIs for managing products, orders, customers, promotions, and storefronts with strong B2B and headless commerce support.
Swell Commerce
API-first headless commerce platform with a REST API and GraphQL API designed for building custom storefronts, supporting subscriptions, digital products, B2B, and multi-currency scenarios.
Adobe Commerce / Magento
Enterprise-grade open-source e-commerce platform (now Adobe Commerce) with a comprehensive REST and GraphQL API for headless commerce, catalog management, order processing, and customer data automation.
WooCommerce REST API
WordPress-based ecommerce plugin with a REST API for managing products, orders, customers, coupons, and store settings on self-hosted WooCommerce stores.
PrestaShop
Open-source e-commerce platform popular in Europe with a REST API (Webservice API) for managing products, orders, customers, and store configuration on self-hosted deployments.