Developer docs

Build on Numu.

Everything you need to integrate, extend, and automate your Numu store — from REST APIs to webhooks to full storefront customisation.

Getting started

Set up your API key, make your first request, and explore the sandbox in under 10 minutes.

Storefront API

Query products, collections, and carts. Build headless storefronts in any framework you prefer.

Admin API

Manage orders, inventory, customers, and fulfilment programmatically at any scale.

Webhooks

Subscribe to real-time events — order.created, payment.captured, shipment.dispatched, and 40+ more.

App development

Build and list your own app in the Numu App Market. OAuth 2.0 flow with fine-grained scoped permissions.

Theme SDK

Customise every pixel of your storefront with Liquid-style templates and the Numu Design System.

Quick links

AuthenticationRate limitsErrors & status codesChangelogAPI reference

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