Run your Shopify card inventory from CardSync Pro

1. Create an app in your store's organization

1. Sign in as the store owner, or use a Shopify account with app-development and installation permissions.
2. In Shopify, open Settings → Apps → Develop apps → Build apps in Dev Dashboard. You can also open the Shopify Dev Dashboard.
3. Select the organization that owns your store. Open Apps → Create app → Start from Dev Dashboard.
4. Name it CardSync Pro Connection and select Create. This is your store-owned integration app; it is not the public CardSync Pro App Store listing.

2. Configure and release an app version

Open Versions and create a version. A version saves your app settings and permissions; it is different from the Shopify API version.

App URL

For this non-embedded, API-only app, use Shopify's default home: https://shopify.dev/apps/default-app-home. If an embedded-app option is shown, leave it off for this setup.

Webhooks API version

Choose the newest stable version available in Shopify's selector. Avoid unstable or release-candidate versions. This selection does not configure CardSync's API requests or automatically enable order webhooks.

Access → Scopes

Select the permissions below, or paste this comma-separated list if Shopify provides a text field:

read_products,write_products,read_inventory,write_inventory,read_locations,read_orders

These allow product publishing, stock updates, location lookup, and paid-order reading. If Shopify groups read and write access, select write access for products and inventory, plus read locations and read orders. Do not request unrelated permissions.

Select Release, optionally name the version, then confirm. Make sure the released version appears as active before installing.

3. Install the released app on your store

1. Open your app's overview and find the Installs card.
2. Select Install app, choose your store, review the requested access, and select Install.
3. Confirm you installed on the intended store. For the client-credentials method, the app and store must belong to the same Shopify organization.

Changing scopes later requires a new released version and approval of the updated permissions in Shopify. Releasing a version alone does not grant the new access.

4. Connect the installed app to CardSync Pro

Open the app's Settings / App settings → Credentials. New Dev Dashboard apps show a Client ID and a Client secret. Neither is an Admin API access token.

1. Open CardSync Pro → Sales Channels → Shopify setup.
2. Choose Dev Dashboard app — automatic token renewal.
3. Enter your permanent your-store.myshopify.com domain, then copy the Client ID and Client secret into their matching fields. Do not email or message your secret.
4. Select Test connection and confirm the returned store name is yours. Then select Save connection.
5. Select Test connection again to verify the saved credentials. You can now configure inventory sync; connecting alone does not publish your entire inventory.

Access tokens expire after 24 hours. CardSync Pro renews them automatically before use, so you do not need to generate or paste tokens each day. If you rotate the app secret, uninstall the app, or change its permissions, update the connection here.

Already have a legacy custom app?

Use this path only for an existing app created in Shopify admin before January 1, 2026 that supplies an Admin API access token. You cannot create a new legacy app today.

1. Open the existing app from Shopify's Develop apps / Legacy custom apps area. Confirm it has the scopes listed in step 2.
2. Use its Admin API access token. If it was already revealed, use your securely saved copy; do not uninstall a working integration just to look for it.
3. In CardSync, open Sales Channels → Shopify setup. Choose Existing legacy Admin API access token, then enter the permanent your-store.myshopify.com domain and token in their matching fields.
4. Select Test connection. Confirm the returned shop is yours, resolve any missing permissions, then select Save connection.
5. Test the saved connection again. Only then review inventory publishing and sync settings. A successful connection does not automatically publish your entire inventory.

Sell linked inventory in Shopify POS

1. Connect the same Shopify store used by your register. In Sales Channels, verify paid-order access and resolve any connection warnings.
2. Publish or link the exact inventory variant in CardSync. For eBay updates, link that same inventory item to its eBay listing and enable quantity sync.
3. In Shopify, make the product available to Point of Sale, stock the register location, and set a unique barcode on the matching variant.
4. In Shopify POS, select that store and location. Scan the variant barcode with the built-in scanner, confirm the item and quantity, then complete checkout.
5. Return to CardSync and refresh inventory. Check Inventory Sync for completed jobs or errors, then verify the linked eBay quantity. Processing may take a short time after payment.

Checkout and payment stay in Shopify POS. A cart alone does not deduct CardSync inventory. Do not enter a second manual sale in CardSync for the same checkout. This workflow uses your existing store connection; the public Shopify app listing remains awaiting approval.

Troubleshooting

I cannot find Develop apps or my store.

Check your Shopify permissions and selected organization. Ask the store owner to create or install the app if your account lacks access.

Where is Reveal Admin API access token?

That belongs to legacy apps. New Dev Dashboard apps use Client ID and Client secret; return to step 4.

Connect Shopify says the app is unavailable.

The dedicated-store authorization button is not a general installation route for a fresh merchant. Public App Store installation is awaiting approval. Use the Dev Dashboard app credential form in step 4.

Missing scopes after releasing a new version?

Approve the updated permissions on the installed app in Shopify, then test again. Do not uninstall an existing working app.

Connected yesterday, expired today?

Replace the manually pasted token using the Dev Dashboard app method in step 4. Save the Client ID and Client secret so CardSync Pro can renew access automatically.

The domain is rejected.

Use the permanent .myshopify.com domain from Shopify Settings → Domains, not your custom storefront URL or an admin.shopify.com page address.

My fresh CardSync account cannot use Shopify.

Check the Shopify capability included in your current CardSync plan. Creating an account or installing the custom app does not change plan access.