To start using Montonio payments in your Shopify store, you need to activate each payment app directly in the Shopify admin interface. This article walks you through the entire process step by step.
❗️ Important: You must have a Montonio account before you can activate payments in Shopify.
If you haven’t signed up yet, please create a Montonio account.
📖 Full instructions on onboarding and account setup can be found here:
1. Open Montonio payment app link
Each Montonio payment method needs to be installed separately using a separate Shopify app link.
You can find the full list of app URLs here: List of Montonio Payments Apps on Shopify.
Click on the link for the specific app/payment method you want to install.
This will open the corresponding app page in Shopify.
2. Install the app
Once you’ve opened the first payment app page:
Click Install or Open to begin the setup.
3. Connect your Montonio account
You’ll now be prompted to connect your Montonio account to your Shopify store. Click Connect Montonio account and sign in.
Select the store that you want to connect and click Connect store to complete the set up.
Alternatively, you can enter your API keys manually in the app settings in Shopify.
How to manually connect the store with API keys?
How to manually connect the store with API keys?
If you need to enter the keys manually, click Install, then expand the section below to see the fields for the API keys.
Enter the keys you obtained from the Partner System, and don’t forget to click Save.
API keys can be accessed via the Montonio Partner System:
How to find Live API Keys in the Partner System?
There are two types of API keys:
Live API Keys – used for real transactions.
Sandbox API Keys – used for testing in test mode.
🧪 We recommend testing your integration first using sandbox keys. To do this, enable Test mode using the toggle in the app settings and then enter your sandbox keys.
4. Activate the app
After connecting your store to Montonio or manually entering the API keys:
Click the Activate button (black button) to finalize the setup.
Make sure to Save changes.
Once this is done, your activated payment method will be available in your Shopify checkout.
5. Repeat for all required payment methods
Each Montonio-supported payment method has a separate app. Repeat this installation and activation process for each you want to offer in your Shopify checkout.
Learn more about customising Montonio payment apps on Shopify.
Refund handling between Shopify and Montonio
When a refund is initiated in the Shopify admin panel, the order status is automatically updated to (partially) refunded in the Montonio Partner System ✅
When a refund is initiated in the Montonio Partner System, the order status in Shopify does not update to reflect the refund ❌
⚠️ Important: Shopify does not allow external systems to modify its order statuses. For accurate status tracking and reporting, we recommend initiating all refunds directly in the Shopify admin panel.