API Sandbox

Banking Circle’s API sandbox is an environment designed to provide your company with a safe and simple tool to test our API against your application. The sandbox environment is not connected to any payment schemes. Instead, it mirrors the functionality of production with a rule-engine that defines the logic for the payment outcome. The sandbox allows you to test payments, reports and notifications through our API.

To begin using the sandbox, you’ll need to be authorized in order to get your certificates, username and passwords from the Banking Circle Sales team here.


The authorization service for the sandbox environment is similar to that of the production environment. Click here for further information about authorization.


The Payment API allows you to manage payments as Single Payments or as Payment Bulks. For example, if your workflow or automation process is designed to initiate payments every 10 minutes and you would like them executed as soon as possible, you would choose Single Payment.

In other cases, you can choose to send payments in bulk, to initiate a collection of payments to be processed at the same time.

You can use the Payment id to look up the status of a payment. The API in the sandbox is connected to a mocked setup and is not connected to any payment schemes.

Transaction outcomes will depend on the currencies of the sender and receiver accounts, as shown below:

StatusCurrency Cross
Missing FundingEURDKK
Pending ProcessingDefault for any cross not specified in the other handlers

If you write beneficiary in the DebtorReference field the outcome of the payment will be based on the IBAN of the beneficiary account. The below table shows which IBANs will result in which status. Any other IBAN inserted will result in PendingProcessing.

IBAN or BBANStatus
GB73CITI18500817486545Missing Funding
18445566Missing Funding
FR7630004008970000349128205Missing Funding

Click here for an overview of payment instructions.


You can use the Report API to request any of the following reports, regardless of which channel you have used for payment instruction:

  • Reconciliation - Details of all account movements in the requested date range for reconciliation purposes
  • Rejection - Information on all rejected payments with rejection date on the requested date
  • Account Balance - The latest available balances for all accounts
  • Account Activity - All activity for a specific account in the requested date range

Please note that the balance field in your report(s) may display an incorrect amount at this time. We are working on solving this issue.

Click here for reporting instructions.


The Notifications functionality in the API Sandbox allows you to receive notifications when internal incoming payments reach your accounts, or when outgoing payments change status to processed or rejected. As this is a mocked setup, it follows a rule-based engine for payment processing, and there are few differences between this and the Notifications running in production. You can read more about the Notifications behaviour in production here.

If you want to receive notifications on Outgoing Rejected and Outgoing Processed payments’ statuses, you should build your requests to include certain currency pairs or beneficiaries’ IBANs or BBANs to generate the desired status. You can read more about Payments in the Sandbox by clicking here.

If you want to receive notifications on Incoming payments’ statuses, you can trigger them by initiating payments to internal Banking Circle accounts that you have access to, and that will have Processed as result status. When the status changes to Outgoing Processed, you will receive a notification on the account that you have sent the payment to.

The retry mechanism has been modified in the Sandbox environment so that it fits better with your testing schedules. Therefore, we have infinite retries and Notifications subscriptions won't be deactivated until either you or we decide to do so. This means that we will continue sending notifications to your URL even if we do not receive a successful response 2xx.

If you want to set up notifications in the Sandbox environment, you should contact our Sales team with the information described under Prerequisites for setting up notifications. You can find more information on Prerequisites here.