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2026.08.03
4 structure changes including:
4 Modifications
Modified 4
GET /fee-charges
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • source, status properties Added
GET /settlements
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • netAmount property Modified
          • Property is now deprecated
        • amount, fundingType properties Added
GET /settlements/transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • settlement property Modified
        • netAmount property Modified
          • Property is now deprecated
        • amount, fundingType properties Added
GET /settlements/{settlementId}
  • Response
  • 200 response Modified
    • application/json content type Modified
      • netAmount property Modified
        • Property is now deprecated
      • lineItems property Modified
        • netAmount property Modified
          • Property is now deprecated
        • amount property Added
      • amount, fundingType properties Added
2026.07.27
5 structure changes including:
1 Breaking change
2 Additions
2 Modifications
1 Removal
Modified 2 Breaking
GET /fee-charges
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • settlementId, settledTransaction, feeBreakdown properties Added
GET /settlements/transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • id, batch, fiskaTransactionId, providerTransactionReference, amount, feeAmount, feeBreakdown properties Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
        • settlement, transactionId, transactionType, gatewayTransactionId, batchId properties Added
Removed 1 Breaking
GET /settlements/{batchId}
  • Removing a resource is always breaking unless it was deprecated before
    Breaking
Added 2
GET /settlements
GET /settlements/{settlementId}
2026.07.16
20 structure changes including:
12 Additions
8 Modifications
Modified 8 Breaking
POST VoidCompletedwebhook
  • Header
  • x-fsk-wh-chksm header Removed
    • Removing a resource is always breaking unless it was deprecated before
      Breaking
  • svix-id, svix-timestamp, svix-signature headers Added
POST TokenUpdatedwebhook
  • Header
  • x-fsk-wh-chksm header Removed
    • Removing a resource is always breaking unless it was deprecated before
      Breaking
  • svix-id, svix-timestamp, svix-signature headers Added
POST TokenRemovedwebhook
  • Header
  • x-fsk-wh-chksm header Removed
    • Removing a resource is always breaking unless it was deprecated before
      Breaking
  • svix-id, svix-timestamp, svix-signature headers Added
POST TokenCreatedwebhook
  • Header
  • x-fsk-wh-chksm header Removed
    • Removing a resource is always breaking unless it was deprecated before
      Breaking
  • svix-id, svix-timestamp, svix-signature headers Added
POST SaleCompletedwebhook
  • Header
  • x-fsk-wh-chksm header Removed
    • Removing a resource is always breaking unless it was deprecated before
      Breaking
  • svix-id, svix-timestamp, svix-signature headers Added
POST RefundCompletedwebhook
  • Header
  • x-fsk-wh-chksm header Removed
    • Removing a resource is always breaking unless it was deprecated before
      Breaking
  • svix-id, svix-timestamp, svix-signature headers Added
POST CaptureCompletedwebhook
  • Header
  • x-fsk-wh-chksm header Removed
    • Removing a resource is always breaking unless it was deprecated before
      Breaking
  • svix-id, svix-timestamp, svix-signature headers Added
POST AuthCompletedwebhook
  • Header
  • x-fsk-wh-chksm header Removed
    • Removing a resource is always breaking unless it was deprecated before
      Breaking
  • svix-id, svix-timestamp, svix-signature headers Added
Added 12
POST PricingTemplateRejectedwebhook
POST PricingTemplateApprovedwebhook
POST MerchantRejectedwebhook
POST MerchantApprovedwebhook
POST MerchantApplicationSubmittedwebhook
POST MerchantApplicationStatusChangedwebhook
POST MerchantApplicationStartedwebhook
POST MerchantApplicationRequiresActionwebhook
POST MerchantApplicationInfoUploadedwebhook
GET /settlements/{batchId}
GET /settlements/transactions
GET /fee-charges
24 structure changes including:
24 Modifications
Modified 24
DELETE /payment-methods/token/{id}
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
GET /transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • paymentMethod, transactionResponses properties Modified
POST /payment-methods/physical
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST /payment-methods/virtual
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
POST /transactions/capture
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST /transactions/physical-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST /transactions/physical-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST /transactions/refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST /transactions/token-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST /transactions/token-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST /transactions/unreferenced-physical-refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST /transactions/unreferenced-virtual-refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
POST /transactions/virtual-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
POST /transactions/virtual-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
POST /transactions/void
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
PUT /payment-methods/token/{id}
  • Response
  • 200 response Modified
    • application/json content type Modified
      • paymentMethod property Modified
        • accountType property Added
POST AuthCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST CaptureCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST RefundCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST SaleCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST TokenCreatedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
POST TokenRemovedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • paymentMethod property Modified
        • accountType property Added
POST TokenUpdatedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • paymentMethod property Modified
        • accountType property Added
POST VoidCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • paymentMethod property Modified
        • accountType property Added
      • transactionResponses property Modified
        • paymentMethod property Modified
2026.04.28
6 structure changes including:
6 Modifications
Modified 6 Breaking
GET /transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • threeDs property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/physical-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST /transactions/physical-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST /transactions/unreferenced-physical-refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST AuthCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • threeDs property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST SaleCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • threeDs property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
2026.02.02
8 structure changes including:
8 Modifications
Modified 8
GET /transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • threeDs property Modified
POST /transactions/physical-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs property Modified
        • status property Added
POST /transactions/physical-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs property Modified
        • status property Added
POST /transactions/token-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs property Modified
        • status property Added
POST /transactions/token-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs property Modified
        • status property Added
POST /transactions/unreferenced-physical-refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs property Modified
        • status property Added
POST AuthCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • threeDs property Modified
        • status property Added
POST SaleCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • threeDs property Modified
        • status property Added
8 structure changes including:
8 Modifications
Modified 8 Breaking
GET /transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • threeDsChallenge property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/physical-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDsChallenge property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST /transactions/physical-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDsChallenge property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST /transactions/token-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDsChallenge property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST /transactions/token-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDsChallenge property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST /transactions/unreferenced-physical-refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDsChallenge property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST AuthCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • threeDsChallenge property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
POST SaleCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • threeDsChallenge property Removed
        • Removing a resource is always breaking unless it was deprecated before
          Breaking
11 structure changes including:
11 Modifications
Modified 11
GET /transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • threeDs, threeDsChallenge properties Added
POST /payment-methods/virtual
  • Body
  • application/json content type Modified
    • formConfig property Modified
      • enable3DSecure property Added
POST /transactions/physical-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs, threeDsChallenge properties Added
POST /transactions/physical-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs, threeDsChallenge properties Added
POST /transactions/token-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs, threeDsChallenge properties Added
POST /transactions/token-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs, threeDsChallenge properties Added
POST /transactions/unreferenced-physical-refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • threeDs, threeDsChallenge properties Added
POST /transactions/virtual-auth
  • Body
  • application/json content type Modified
    • formConfig property Modified
      • enable3DSecure property Added
POST /transactions/virtual-sale
  • Body
  • application/json content type Modified
    • formConfig property Modified
      • enable3DSecure property Added
POST AuthCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • threeDs, threeDsChallenge properties Added
POST SaleCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • threeDs, threeDsChallenge properties Added
3 structure changes including:
3 Modifications
Modified 3
POST /payment-methods/virtual
  • Body
  • application/json content type Modified
    • accountHolder property Added
POST /transactions/virtual-auth
  • Body
  • application/json content type Modified
    • accountHolder property Added
POST /transactions/virtual-sale
  • Body
  • application/json content type Modified
    • accountHolder property Added
16 structure changes including:
16 Modifications
Modified 16
GET /transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • transactionResponses property Modified
POST /payment-methods/physical
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST /transactions/capture
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST /transactions/physical-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST /transactions/physical-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST /transactions/refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST /transactions/token-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST /transactions/token-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST /transactions/unreferenced-physical-refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST /transactions/void
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Added
POST AuthCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Added
POST CaptureCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Added
POST RefundCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Added
POST SaleCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Added
POST TokenCreatedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Added
POST VoidCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Added
16 structure changes including:
16 Modifications
Modified 16 Breaking
GET /transactions
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • transactionResponses property Modified
POST /payment-methods/physical
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/capture
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/physical-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/physical-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/token-auth
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/token-sale
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/unreferenced-physical-refund
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST /transactions/void
  • Response
  • 200 response Modified
    • application/json content type Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST AuthCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST CaptureCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST RefundCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST SaleCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST TokenCreatedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
POST VoidCompletedwebhook
  • Body
  • application/json content type Modified
    • originalResponse property Modified
      • transactionResponses property Modified
        • accountType property Removed
          • Removing a resource is always breaking unless it was deprecated before
            Breaking
1 structure change including:
1 Modification
Modified 1
GET /payment-methods/account-holder/{accountHolderId}
  • Response
  • 200 response Modified
    • application/json content type Modified
      • items property Modified
        • cardType, maskedCardNumber, cardExpDate properties Modified
          • Properties are no longer required
        • accountNumber, accountType properties Added