Migrating from v1 to v2 | Mollie Documentation

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The v1 API has been shut down on December 31st, 2024 and is no longer available to use. If you have technical question regarding switching API versions, feel free to join our Developer Community on Discord.

Why upgrade to v2

The Mollie API v2 offers some compelling new features compared to the older v1 API:

Fully supports multicurrency. You can create payments, subscriptions, and refunds in non-EUR currencies. Your account will still be settled in EUR, so new fields have been added in the API to reflect the settlement amount for various resources.
Possible to update details of payments via the new Update payment.
Improved support for accessing large sets of objects, now uses cursor-based pagination instead of pagination based on counts and offsets.
Settlement details are now available for refunds and chargebacks as well.
New features such as Mollie Components, Place a hold for a payment, and wallets such as Apple Pay are only available in the Mollie API v2.
Improved error messages. Error message will contain more details to help you quickly resolve any implementation problems.

How to upgrade to the v2

To migrate to v2 API, follow these basic steps:

Understand the changes
- Refer to this section, to understand the changes, deprecated features, and new functionalities.
Update your code
- Identify affected areas: Locate the parts of your code that interact with the old API.
- Modify requests: Update the API endpoint URLs to the new version.
- Change parameters: Adjust the request parameters to match the new API specifications.
- Handle responses: Update your code to correctly process the new API responses, which might have different formats or additional fields.
Test the v2 API
- Execute your existing tests to see if they still pass. Write new tests if necessary to cover the changes in the new API.
- Look out for any errors or unexpected behaviour in your application.
Update your internal documentation to reflect the new API usage.
Monitor
- After updating, keep an eye on the performance of your application.

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There are no changes to the authentication. API keys, Organization and OAuth tokens work both on V1 and V2.

Changes in v2

In general, the API has adopted the HAL specification, allowing you to discover new resources and follow links to new resources while working with the API.

Several fields have changed too to support new features or to clear up confusing aspects of the v1 API.

The identifier for the payment method Bancontact has been renamed from mistercash to bancontact in the v2 API.

Some resources support embedding of related sub-resources. For instance, when retrieving a payment any refunds can be embedded by using the embed=refunds query string parameter. See the Get payment endpoint for more information.

Amount changes

All amounts in the API are passed as a map containing both a currency and a value property, for example:

{
    "amount": {
        "currency": "EUR",
        "value": "10.00"
    }
}

This example object describes an amount of €10.00.

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Note
If you specify an amount, you must specify the correct number of decimals. We strongly recommend sending value as a string. And even though most currencies use two decimals, some use three or none, like JPY.

All amounts returned in the v2 API will use this format.

Locale changes

Only full locales with both the language and the country code are supported, e.g. nl_NL. Locales are always returned as full locales.

Combined date and time fields

Formatting of fields such as createdAt has been updated to be strictly compliant to ISO-8601 formatting. Example value: 2018-03-05T12:30:10+00:00.

Changes in the Payments API

The following changes have been made in regards to the status of payments:

The statuses paidout, refunded and charged_back have been removed.
The status cancelled has been renamed to canceled (US English spelling).
If you want to see if a payment has been settled to your bank account, it will contain the settlement key in the _links property.
If you want to see if a payment has any refunds, the payment will have the refunds key in the _links property, which will point you to the refunds resource where you can view the refund details.
If you want to see if a payment has any chargebacks, the payment will have the chargebacks key in the _links property, which will point you to the chargeback resource where you can view the chargeback details.

The individual billing and shipping address parameters that can be used when creating a credit card or PayPal payment have been replaced by address objects. Instead of passing billingAddress, billingPostal, billingCity, billingRegion and/or billingCountry (or the equivalent fields starting with shipping), one should now pass a billingAddress (and/or shippingAddress) object, as follows:

{
    "amount": {"currency": "USD", "value": "100.00"},
    "description": "Order #12345",
    "billingAddress": {
        "streetAndNumber": "Dorpstraat 1",
        "postalCode": "1122 AA",
        "city": "Amsterdam",
        "region": "Noord-Holland",
        "country": "NL",
    }
}

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Note
The usage of the address object parameters remains optional. Please refer to the Create payment documentation for exact specifications on what input is accepted.

The following fields have been changed, renamed or moved:

cancelledDatetime has been renamed to canceledAt.
createdDatetime has been renamed to createdAt.
expiredDatetime has been renamed to expiredAt.
failedDatetime has been renamed to failedAt.
paidDatetime has been renamed to paidAt.
canBeCancelled has been renamed to isCancelable.
recurringType has been renamed to sequenceType. This field is now always present. A one-off payment (not the start of a recurring sequence and not a recurring payment) will have the value oneoff.
redirectUrl and webhookUrl are now part of the top-level object for Payments.
links.paymentUrl has been renamed to _links.checkout as per HAL specifications.
failureReason has been moved from the Payment resource to the credit card detail object, and no longer available for Bancontact payments.

The following fields have been removed:

expiryPeriod has been removed from the Payment resource. You can use expiresAt which contains the same information.
issuer has been removed from the Payment resource. You can however, still pass it to the Create payment endpoint.
details.bitcoinRate has been removed from the Bitcoin detail object.
details.bitcoinAmount has been removed from the Bitcoin detail object.
details.cardCountry has been removed from the credit card detail object.
The option to include the settlement using the include query string parameter has been removed.

These new fields have been added:

settlementAmount has been added to the responses of the Payments API, the Refunds API and the Chargebacks API. This optional field will contain the amount that will be settled to your account, converted to the currency your account is settled in. It follows the same syntax as the amount property.
Note that for refunds and chargebacks, the value key of settlementAmount will be negative.
Any amounts not settled by Mollie will not be reflected in this amount, e.g. PayPal or gift cards.
_links.status has been added to the responses for banktransfer payments. Your customer can check the status of their transfer at this URL.
_links.payOnline has been added to the responses for banktransfer payments. At this URL your customer can finish the payment using an alternative payment method also activated on your website profile.

Changes in the Refunds API

The following fields have been changed, renamed or moved:

amount is now mandatory when creating a refund. You must specify both amount.currency and amount.value.
The amount field is now of the amount type and contains a value and a currency.
payment, which contained the payment resource related to the refund, is no longer returned. Instead, the payment ID is returned by default, in the paymentId field. The payment resource can still easily be accessed using the payment key in the _links property.
The resource will contain a link to the settlement if it is settled (via the settlement key in the _links property.

These new fields have been added:

settlementAmount has been added. See the explanation of the settlementAmount for the Payments API.

Changes in the Chargebacks API

The following fields have been changed, renamed or moved:

The amount field is now of the amount type and contains a value and a currency.
chargebackDatetime has been renamed to createdAt.
reversedDatetime has been renamed to reversedAt. This field is now only returned if the chargeback is reversed.
payment, which contained the payment ID related to the chargeback, has been renamed to paymentId. The payment resource can easily be accessed using the payment key in the \_links property.
The resource will contain a link to the settlement if it is settled (via the settlement key in the \_links property.

These new fields have been added:

settlementAmount has been added. See the explanation of the settlementAmount for the Payments API.

Changes in the Methods API

The following fields have been changed, renamed or moved:

amount including minimum and maximum have been renamed to minimumAmount and maximumAmount. This should be an object containing value and currency.
The image fields normal and bigger have been renamed to size1x and size2x.
Pagination has been removed, so all fields related to pagination are not available anymore. The list method will now return all payment methods.

The following parameters have been changed or added:

The parameter recurringType has been renamed to sequenceType. Possible values are oneoff, first or recurring.
The parameter amount has been added. This should be an object containing value and currency. Only payment methods that support the amount/currency will be returned. Example: https://api.mollie.com/v2/methods?amount[value]=100.00&amount[currency]=USD

Changes in the Issuers API

The issuers API has been removed. Instead, you can get the issuers via the Get method endpoint on the Methods API using the issuers include.

Changes in the Customers API

The following fields have been changed, renamed or moved:

createdDatetime has been renamed to createdAt.
recentlyUsedMethods has been removed.

Changes in the Subscriptions API

The following changes have been made in regards to the status of subscriptions:

Subscriptions that are canceled can be retrieved from the API, and will not return a HTTP status 410 Gone.
The canceled status is changed from British English to American English.

The following fields have been changed, renamed or moved:

createdDatetime has been renamed to createdAt.
cancelledDatetime has been renamed to canceledAt, and is now only returned when the subscription is canceled.
webhookUrl is now part of the top-level object for Subscriptions.

Changes in the Profiles API

The following fields have been changed, renamed or removed:

createdDatetime has been renamed to createdAt
updatedDatetime has been removed.
phone is now formatted in E.164 formatting.
The API keys subresource has been removed.

New APIs have been added, such as the Get current profile endpoint.

Changes in the Settlements API

The following fields have been changed, renamed or moved:

createdDatetime has been renamed to createdAt.
settledDatetime has been renamed to settledAt.
The fields paymentIds, refundIds and chargebackIds has been removed.
All amounts have been changed to the amount type. Note that the costs.amount\* fields can have more decimals than you would expect. The same goes for rate.fixed, which can contain fractional cents.
amount.net, amount.vat and amount.gross have been moved one level up as amountNet, amountVat and amountGross.
If the settlement has been invoiced, it will contain the invoice key in the \_links property.
The reference parameter in the List settlements endpoint has been removed.

Changes in the Mandates API

The following fields have been changed, renamed or moved:

createdDatetime has been renamed to createdAt.

Changes in the Organizations API

The fields country, registrationDate and registrationType have been removed.
The field address is now an Address object.

Changes in the Permissions API

The field warning has been removed.

Changes in the Invoice API

issuedDate has been renamed to issuedAt.
paidDate has been renamed to paidAt.
dueDate has been renamed to dueAt.
amount.net, amount.vat and amount.gross have been moved one level up as netAmount, vatAmount and grossAmount.
pdf has been moved into the \_links property.

Changes in error reporting

In general, error reporting has been improved to help you resolve any implementation errors as fast as possible.

The HAL specification has been adopted for error reporting as well. The difference between v1 and v2 is best explained using an example.

The new error reporting format in v2 is the following:

{
    "status": 401,
    "title": "Unauthorized Request",
    "detail": "Missing authentication, or failed to authenticate",
    "_links": {
        "documentation": {
            "href": "https://docs.mollie.com/overview/authentication",
            "type": "text/html"
        }
    }
}

The HTTP status returned is now part of the error response, title is the default HTTP status message, the message field is renamed to detail.