Configuring Adyen Payment Method

Important notes

• Some countries require the state or province field to enable specific payment methods. Configure them in the Sylius admin: Configuration → Countries.

• Available payment methods are resolved based on your shop’s base currency. Example: if the base currency is USD and the customer switches to EUR, methods limited to EUR (e.g., Klarna) will not be shown.

• When testing with a tunneling tool (e.g., ngrok), always use the public HTTPS URL in Adyen (not localhost). Update it whenever the tunnel URL changes.

Prerequisites

• Adyen account (a test account is sufficient for setup).

• Merchant account in Adyen.

• API key and Client key.

• Allowed Origin (your shop URL).

Setup

Adyen Dashboard – API credentials

1. Sign in to Adyen and go to Developers → API credentials.

2. Click Create new credential and select Web service user.

3. After the credential is created, you will be redirected to its details page.

4. In the Server settings section, generate and copy the API key — it will only be shown once.

5. In the Client settings section, generate a Client key and copy it as well.

6. Add an Allowed origin for your shop URL (e.g. https://shop.example.com). For testing with a tunneling tool (e.g. ngrok), use the public HTTPS URL.

7. Save changes.

Adyen Dashboard – Webhook configuration

1. Go to Developers → Webhooks.

2. Click Create new webhook.

3. Select Standard webhook and click Add.

4. Decide on a code for the new Adyen payment method in the Sylius Admin panel (e.g. adyen_code).

5. In the Server configuration section, set the following Sylius endpoint for handling webhooks: https://shop.example.com/payment/adyen/adyen_code/notifications. Replace adyen_code with the code of your choice.

6. In the Security section, create a username and a secure password. Store them, as you will need them later in Sylius.

7. In the HMAC section, generate a new HMAC key and copy it.

8. Save the webhook configuration. After you finish setup in Sylius, return here to test the connection by clicking Test configuration and selecting any event.

Sylius Admin Panel

1. Go to Configuration → Payment Methods.

2. Click Create → Adyen.

3. Enter the same code you decided earlier (e.g. adyen_code).

4. Fill in all required fields in the Gateway configuration.

For the Live endpoint URL prefix field, in the test environment you can enter a placeholder value such as prefix.

6. Save.

To verify the configuration, go back to the Adyen Dashboard and send a test webhook call. It should be processed successfully.