The API URLs:

Authentication is managed using an API key that is provided to you. Every HTTP call to our API should contain a custom header called apiKey. The value of this header must be the API key.

You can find your API key under Developers > API key in our customer login environment.

To make our platform support all currencies and to prevent rounding errors, amounts are stored as natural numbers, paired with an exponent. This exponent defines at which position the decimal point/comma is placed, counting from the right.

Say we have and amount of 12.34 EUR. It will be stored and presented as 1234 with an exponential of 2. Some currencies, like the Japanese Yen, have no exponent. A transaction amount of ¥1,000 JPY is stored as 1000.

Filters can be used to interact with any object. Objects can be queried by appending parameters to the query string of the URL.

So to get a list of all settled US dollar transactions with an amount equal or greater than 75.00, we would use the following URL:

/v1/transaction?status=SETTLEMENT_COMPLETED&amount>=7500

It's also possible to filter multiple statuses at the same time. For example to retrieve all successful transactions:

/v1/transaction?status[]=SETTLEMENT_COMPLETED&status[]=SETTLEMENT_REQUESTED

For list endpoints, you can specify the sort order using the query parameters _sort and _sort- .

Sort order ASC

• Numerical from lowest first
• Text in alphabetical order
• Dates from the earliest first

Query parameter: _sort=

/v1/transaction?_sort=created_at

Sort order DESC

• Numerical from highest first
• Text in reverse alphabetical order
• Dates from latest first

Query parameter: _sort-=

/v1/transaction?_sort-=created_at

The API supports population. This means that fields that reference a certain object will be automatically resolved. Population can be achieved by providing the relevant fields the query parameter _populate.

As an example, let's take a payment profile object:

{
    "id": "7c23a50d-8699-431c-a82b-a78718d2b6f6",
    "organisation": "c96b2d81-51db-4a8a-a0e9-19918c168a3c",
    "name": "My profile",
    "currency_code": "EUR",
    ...
}

To know the name of the organisation that this payment profile belongs to, we would have to make an api-call requesting the organisation with ID c96b2d81-51db-4a8a-a0e9-19918c168a3c.

Population allows us to let the server do this for us. If we call /paymentprofile/7c23a50d-8699-431c-a82b-a78718d2b6f6?_populate=organisation, we get the following results:

{
    "id": "7c23a50d-8699-431c-a82b-a78718d2b6f6",
    "organisation": {
        "id": "c96b2d81-51db-4a8a-a0e9-19918c168a3c",
        "name": "Example Company",
        "parent_id": "cc5a8e9b-a39a-4e53-b404-668a5426cca2"
    }
    "name": "My profile",
    "currency_code": "EUR",
    ...
}

Like with filters it's also possible to populate multiple objects. As an example:

/v1/paymentprofile?_populate[]=organisation&_populate[]=bank_account

Each request made to the API may return an error object of the following shape:

Click here to see the complete list of codes.

The code field is something on which one can rely: it will remain the same in future implementations and it is easy to parse. The message and details properties however are not intended to be manipulated by a program. They would rather serve for debugging and are only expected to be read by human beings: they are likely to be adjusted in the future (to make them clearer or more precise).

Cards will be stored automatically after transactions. It is also possible to use a card add link to store a card without a transaction

With payment modalities such as credit cards and SEPA Direct Debit, consumers possess the capability to raise a dispute and initiate a chargeback in situations where, for instance, the acquired items fail to be delivered, and the seller remains unresponsive to inquiries

The customer object represents a customer of your business. It lets you track transactions that belong to the same customer and allows the creation of recurring transactions

A payment link can be shared with your customers. For example it can be communicated via email, chat app or unpaid invoice

With a refund you can return collected funds back to your customer

The transaction flow consists of three main steps: initialization, authorization, and validation. For more information, see our Checkout integration guide