Install the POS+ SDK to process payments from your Castles device.
Installation
Install the POS+ SDK to process payments from your Castles device.
Callback navigation
Learn about the merchant deeplink you can add to your requests.
Manage POS devices
Activate, configure, and update your device.
Initiate POS transactions
Process an in-person card payment.
Modify POS transactions
Update a previously initiated transaction.
Generate receipts
Learn how to generate compliant transaction receipts.
Troubleshooting
Learn about the possible POS+ SDK errors.