Who This Is For / When to Use
This article is for Kyrios account admins who want to:
Accept card payments using Adyen.
Connect an existing Adyen merchant account.
Test payments using Adyen sandbox credentials before going live.
Supported Payment Method
Credit cards
Debit cards
Other Adyen payment methods are not currently supported.
Prerequisites Before You Start
You must have:
An active Adyen merchant account.
Approval from Adyen to process payments.
At least one Company API Key (Live or Sandbox).
Your Adyen Live URL Prefix (for live mode only).
Step 1: Open Payment Integrations in Kyrios
Go to Dashboard.
Navigate to Payments.
Select Adyen from the list of available providers.
Click Connect.
Step 2: Enter Adyen Credentials
Kyrios separates Live and Sandbox credentials. You can configure one or both.
Live Mode Fields
Enter the following:
Company API Key
Live URL Prefix
Click Save after entering both fields.
Sandbox Mode Fields
Enter the following:
Company API Key
Click Save to store sandbox credentials.
Step 3: Set Adyen as the Default Payment Provider
After saving credentials, click Set as default.
Adyen will now be used for:
Payment links
Checkout flows
Card-based transactions
This setting applies at the account level.
Step 4: Test or Accept Live Payments
If Sandbox credentials are connected, you can test card transactions.
If Live credentials are connected, real payments will be processed through Adyen.
Kyrios checkout pages automatically adapt based on the mode used.
Common Issues and Fixes
Payments Fail in Live Mode
Confirm the Live URL Prefix is correct.
Ensure the API key is a Live key, not Sandbox.
Sandbox Payments Do Not Process
Verify the Sandbox API key is active in Adyen.
Confirm you are using test card details.
Adyen Does Not Appear in Checkout
Ensure Adyen is set as the default payment provider.
Confirm the checkout supports card payments.
FAQ
What do I need before connecting Adyen?
You need an active Adyen merchant account, required API credentials, and Adyen approval for payment processing.
Which payment methods are supported?
Only credit and debit card payments are currently supported.
Where do I enter my Adyen credentials?
Go to Dashboard → Payments → Adyen and enter Live or Sandbox credentials.
Can I test payments before going live?
Yes. Use Adyen sandbox credentials to test transactions before enabling live mode.
Does this integration support 3D Secure (3DS)?
Yes. Adyen supports 3D Secure-enabled cards for additional transaction security.
Who controls pricing and regional availability?
All pricing, underwriting, and regional availability are managed directly by Adyen.