1. Make an app for your store in Shopify
- In Shopify, open the Dev Dashboard (Settings → Apps → Develop apps → Build apps in Dev Dashboard) and create an app, e.g. “Varisett Warehouse”.
- In a new version of the app, give it this access: read_orders, read_products, read_inventory, write_inventory, read_locations, read_merchant_managed_fulfillment_orders, write_merchant_managed_fulfillment_orders. To bring in delivery addresses, also allow its access to customer names, addresses and phone numbers (protected customer data). Release the version.
- Install the app on your store (the store must be in the same Shopify organisation as the app).
- From the app's Settings, copy its Client ID and Client secret into the form below.
A custom app made in your store admin before 2026 works too: choose “Admin API access token” and paste its token (shpat_…).