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Creating a store-specific custom app

A custom app is an app that you or a developer builds exclusively for your Shopify store (unlike a public app, which is built to be used by many stores). You can use custom apps to add features to your Shopify admin, access your store's data directly using Shopify's APIs, or extend your online store to other platforms using the Storefront API. Sometimes such a custom app is referred to as a "private app".

Prerequisites

  1. Enable custom app development from the Shopify admin
  2. Create and install a custom app
  3. ⚠️ Have a secure copy of the Admin API access token from the previous step.

Basic concepts

A store-specific custom app does not use the OAuth process to authenticate - it uses the secrets established during the app creation and install process to access the API. As a result, there are no sessions to be retrieved from incoming requests and stored in a database, etc.

When initializing shopifyApi in a custom app

  • set the isCustomStoreApp configuration property to true
  • set the apiSecretKey configuration property to the API secret key obtained during the installation process (step 2 in the prerequisites).
  • set the adminApiAccessToken configuration property to the Admin API access token obtained during the installation process (step 2 in the prerequisites).

Example

Initialization

import "@shopify/shopify-api/adapters/node";
import { shopifyApi, ApiVersion, Session } from "@shopify/shopify-api";
import { restResources } from "@shopify/shopify-api/rest/admin/2023-04";

const shopify = shopifyApi({
  apiSecretKey: "App_API_secret_key",            // Note: this is the API Secret Key, NOT the API access token
  apiVersion: ApiVersion.April23,
  isCustomStoreApp: true,                        // this MUST be set to true (default is false)
  adminApiAccessToken: "Admin_API_Access_Token", // Note: this is the API access token, NOT the API Secret Key
  isEmbeddedApp: false,
  hostName: "my-shop.myshopify.com",
  // Mount REST resources.
  restResources,
});

Note In version 7 and earlier, the apiSecretKey was set to Admin API access token, but this prevented webhook hmac validation from working. To migrate from an app built with an API library version 7.0.0 or earlier, make sure to set the apiSecretKey to the API secret key (needed for webhook hmac validation) and set the adminApiAccessToken to the Admin API access token, required for client authentication.

Making requests

API requests, either using shopify.clients.Rest or shopify.clients.Graphql, or using the REST resources, require a session parameter. Since there are no sessions in a store-specific custom app, a session parameter needs to be created.

To create the session object, the id, state and isOnline properties must be populated but will be ignored. Only the shop parameter is required when making the API requests from a store-specific custom app and the value must match the shop on which the custom app is installed.

The library provides a utility method to create such a session, shopify.session.customAppSession.

const session = shopify.session.customAppSession("my-shop.myshopify.com");

// Use REST resources to make calls.
const { count: productCount } = await shopify.rest.Product.count({ session });
const { count: customerCount } = await shopify.rest.Customer.count({ session });
const { count: orderCount } = await shopify.rest.Order.count({ session });

console.log(
  `There are ${productCount} products, ${customerCount} customers, and ${orderCount} orders in the ${session.shop} store.`
);