Authorize MIT Payment

This endpoint initiates an authorization without shopper interaction for merchant initiated transactions (MIT). It requires a recurringReference from a prior Create MIT Session. No payment page is rendered as the shopper normally is not present.

The endpoint starts an online transaction that:

• Registers the payment with Aera
• Defines the transaction amount and configuration
• All subsequent operations — such as capture, cancel, refund, update, and status retrieval — reference the pspReference generated by this request.

Important note: It is the responsibility of the merchant to only initiate payments which are agreed with the shopper in the terms and conditions. When the payment is merchant-initiated (MIT), the shopper may request a chargeback and the merchant would be liable in a dispute situation.

Request Structure

{
  "header": {
    "merchantId": "Aera Merchant ID",
    "idempotency-key": "UUID v7 provided by merchant to uniquely identify the request"
  },
  "body": {    
    "transactionData": {
      "merchantReference": "Merchant provided reference to the payment (e.g. order number)",
      "recurringReference": "Mandatory: Reference to the initial standing instruction for a recurring  payment",
      "immediateCapture": "Optional, true if immediate capture requested, default false",
      "splitShipment": "Optional, true if shipment potentially can be split into multiple shipments",
      "amountDetails": {
        "amount": "Gross amount in minor units",
        "currency": "ISO 4217 alphabetic code (e.g.NOK), must be the same as the merchant currency"        }
    }
  }
}

Response Structure

The response contains session metadata and checkout information.

{
  "responseInfo": {
    "responseCode": "000",
    "responseText": "Approved"
  },
  "sessionInfo": {
    "pspReference": "018f7a2e-8f5c-7a9b-b123-123456789abc",
    "createdAt": "2026-03-01T10:15:30Z",
    "expiredAt": "2026-03-01T10:30:30Z",
  }
}

Field reference: Authorize MIT Payment

HTTP Headers

Request body

transactionData object

transactionData.amountDetails

Field reference: response

High-level processing result information.

sessionInfo

Authorize Payment metadata.