Adding Scalapay to a Shopify store
Shopify is the fastest route to live. It is a configuration change rather than a development project, and most stores finish setup in an afternoon.
Getting live on Shopify
The order below matters — messaging before testing, testing before live traffic.
Install the app
Add Scalapay from the Shopify App Store inside your admin. Installing does not make anything visible to customers yet.
Connect your account
Paste the API credentials from your Scalapay merchant dashboard to link the store to your account.
Enable the payment method
Turn Scalapay on in your payment settings so it appears alongside your existing options at checkout.
Add on-site messaging
Place the installment message on product and cart pages. This is where most of the conversion effect comes from, not the checkout screen.
Six things specific to Shopify
The details that cause support tickets if you skip them.
Theme compatibility
Standard Shopify themes work without code changes. Heavily customised or headless themes may need the message block placed manually.
Shopify Plus and Markets
Multi-store and multi-currency setups are supported, but each storefront is configured separately.
Where to show the message
Product page first, cart second. A message that only appears at checkout arrives after the decision has been made.
Refunds
Process refunds in Shopify as normal. We reconcile the transaction and adjust the customer plan. How refunds work →
Order limits
Orders run from $200 to $5,000. You can set a tighter range inside that if it suits your catalogue.
Existing payment methods
Nothing is replaced. Scalapay sits alongside cards and wallets as an additional option.
Test the paths that are not the happy one
Every integration works when the customer does exactly the expected thing. Problems come from the other cases.
- A customer who abandons at the approval step — they must land somewhere sensible with the basket intact.
- A declined order — this is a normal outcome, not an error. Send them back to a checkout with other options available.
- A partial refund — check the customer plan recalculates and your own reporting matches.
- An order outside the range — validate against $200 to $5,000 before showing the option, so nobody is offered something that will fail.
Testing only the successful order is the most common reason an integration causes problems in its first week.
Shopify integration FAQ
What developers and store owners ask before starting.
Is there a Scalapay app for Shopify?+
Do I need a developer to set it up?+
Can I test before customers see it?+
Will it work with Shopify Plus?+
How do refunds work in Shopify?+
Does it replace my existing payment methods?+
Other integrations
Same account, different platform.
Ready to add it?
Apply for a merchant account and we will get you the credentials and the docs.