diff --git a/frontend/src/components/RawTransactionModal.tsx b/frontend/src/components/RawTransactionModal.tsx
new file mode 100644
index 0000000..d97e7af
--- /dev/null
+++ b/frontend/src/components/RawTransactionModal.tsx
@@ -0,0 +1,116 @@
+import { X, Copy, Check } from "lucide-react";
+import { useState } from "react";
+import type { RawTransactionData } from "../types/api";
+
+interface RawTransactionModalProps {
+  isOpen: boolean;
+  onClose: () => void;
+  rawTransaction: RawTransactionData | undefined;
+  transactionId: string;
+}
+
+export default function RawTransactionModal({
+  isOpen,
+  onClose,
+  rawTransaction,
+  transactionId,
+}: RawTransactionModalProps) {
+  const [copied, setCopied] = useState(false);
+
+  if (!isOpen) return null;
+
+  const handleCopy = async () => {
+    if (!rawTransaction) return;
+
+    try {
+      await navigator.clipboard.writeText(
+        JSON.stringify(rawTransaction, null, 2)
+      );
+      setCopied(true);
+      setTimeout(() => setCopied(false), 2000);
+    } catch (err) {
+      console.error("Failed to copy to clipboard:", err);
+    }
+  };
+
+  return (
+    <div className="fixed inset-0 z-50 overflow-y-auto">
+      <div className="flex items-center justify-center min-h-screen px-4 pt-4 pb-20 text-center sm:block sm:p-0">
+        {/* Background overlay */}
+        <div
+          className="fixed inset-0 bg-gray-500 bg-opacity-75 transition-opacity"
+          onClick={onClose}
+        />
+
+        {/* Modal panel */}
+        <div className="inline-block align-bottom bg-white rounded-lg text-left overflow-hidden shadow-xl transform transition-all sm:my-8 sm:align-middle sm:max-w-4xl sm:w-full">
+          <div className="bg-white px-4 pt-5 pb-4 sm:p-6 sm:pb-4">
+            <div className="flex items-center justify-between mb-4">
+              <h3 className="text-lg font-medium text-gray-900">
+                Raw Transaction Data
+              </h3>
+              <div className="flex items-center space-x-2">
+                <button
+                  onClick={handleCopy}
+                  disabled={!rawTransaction}
+                  className="inline-flex items-center px-3 py-1 text-sm bg-gray-100 text-gray-700 rounded-md hover:bg-gray-200 transition-colors disabled:opacity-50 disabled:cursor-not-allowed"
+                >
+                  {copied ? (
+                    <>
+                      <Check className="h-4 w-4 mr-1 text-green-600" />
+                      Copied!
+                    </>
+                  ) : (
+                    <>
+                      <Copy className="h-4 w-4 mr-1" />
+                      Copy JSON
+                    </>
+                  )}
+                </button>
+                <button
+                  onClick={onClose}
+                  className="inline-flex items-center p-1 text-gray-400 hover:text-gray-600 transition-colors"
+                >
+                  <X className="h-5 w-5" />
+                </button>
+              </div>
+            </div>
+
+            <div className="mb-4">
+              <p className="text-sm text-gray-600">
+                Transaction ID: <code className="bg-gray-100 px-2 py-1 rounded text-xs">{transactionId}</code>
+              </p>
+            </div>
+
+            {rawTransaction ? (
+              <div className="bg-gray-50 rounded-lg p-4 overflow-auto max-h-96">
+                <pre className="text-sm text-gray-800 whitespace-pre-wrap">
+                  {JSON.stringify(rawTransaction, null, 2)}
+                </pre>
+              </div>
+            ) : (
+              <div className="bg-gray-50 rounded-lg p-8 text-center">
+                <p className="text-gray-600">
+                  Raw transaction data is not available for this transaction.
+                </p>
+                <p className="text-sm text-gray-500 mt-2">
+                  Try refreshing the page or check if the transaction was fetched with summary_only=false.
+                </p>
+              </div>
+            )}
+          </div>
+
+          <div className="bg-gray-50 px-4 py-3 sm:px-6 sm:flex sm:flex-row-reverse">
+            <button
+              type="button"
+              onClick={onClose}
+              className="w-full inline-flex justify-center rounded-md border border-transparent shadow-sm px-4 py-2 bg-blue-600 text-base font-medium text-white hover:bg-blue-700 focus:outline-none focus:ring-2 focus:ring-offset-2 focus:ring-blue-500 sm:ml-3 sm:w-auto sm:text-sm"
+            >
+              Close
+            </button>
+          </div>
+        </div>
+      </div>
+    </div>
+  );
+}
diff --git a/frontend/src/components/TransactionsList.tsx b/frontend/src/components/TransactionsList.tsx
index 23c64d0..a210116 100644
--- a/frontend/src/components/TransactionsList.tsx
+++ b/frontend/src/components/TransactionsList.tsx
@@ -9,10 +9,12 @@ import {
   RefreshCw,
   AlertCircle,
   X,
+  Eye,
 } from "lucide-react";
 import { apiClient } from "../lib/api";
 import { formatCurrency, formatDate } from "../lib/utils";
 import LoadingSpinner from "./LoadingSpinner";
+import RawTransactionModal from "./RawTransactionModal";
 import type { Account, Transaction } from "../types/api";
 
 export default function TransactionsList() {
@@ -21,6 +23,8 @@ export default function TransactionsList() {
   const [startDate, setStartDate] = useState("");
   const [endDate, setEndDate] = useState("");
   const [showFilters, setShowFilters] = useState(false);
+  const [showRawModal, setShowRawModal] = useState(false);
+  const [selectedTransaction, setSelectedTransaction] = useState<Transaction | null>(null);
 
   const { data: accounts } = useQuery<Account[]>({
     queryKey: ["accounts"],
@@ -39,6 +43,7 @@ export default function TransactionsList() {
         accountId: selectedAccount || undefined,
         startDate: startDate || undefined,
         endDate: endDate || undefined,
+        summaryOnly: false, // Always fetch raw transaction data
       }),
   });
 
@@ -74,6 +79,16 @@ export default function TransactionsList() {
     setEndDate("");
   };
 
+  const handleViewRaw = (transaction: Transaction) => {
+    setSelectedTransaction(transaction);
+    setShowRawModal(true);
+  };
+
+  const handleCloseModal = () => {
+    setShowRawModal(false);
+    setSelectedTransaction(null);
+  };
+
   const hasActiveFilters =
     searchTerm || selectedAccount || startDate || endDate;
 
@@ -248,13 +263,13 @@ export default function TransactionsList() {
             const account = accounts?.find(
               (acc) => acc.id === transaction.account_id,
             );
-            const isPositive = transaction.amount > 0;
+             const isPositive = transaction.transaction_value > 0;
 
             return (
               <div
                 key={
                   transaction.internal_transaction_id ||
-                  `${transaction.account_id}-${transaction.date}-${transaction.amount}`
+                   `${transaction.account_id}-${transaction.transaction_date}-${transaction.transaction_value}`
                 }
                 className="p-6 hover:bg-gray-50 transition-colors"
               >
@@ -307,33 +322,51 @@ export default function TransactionsList() {
                     </div>
                   </div>
 
-                  <div className="text-right ml-4">
-                    <p
-                      className={`text-lg font-semibold ${
-                        isPositive ? "text-green-600" : "text-red-600"
-                      }`}
-                    >
-                      {isPositive ? "+" : ""}
-                      {formatCurrency(transaction.amount, transaction.currency)}
-                    </p>
-                    <p className="text-sm text-gray-500">
-                      {transaction.date
-                        ? formatDate(transaction.date)
-                        : "No date"}
-                    </p>
-                    {transaction.booking_date &&
-                      transaction.booking_date !== transaction.date && (
-                        <p className="text-xs text-gray-400">
-                          Booked: {formatDate(transaction.booking_date)}
-                        </p>
-                      )}
-                  </div>
+                   <div className="text-right ml-4">
+                     <div className="flex items-center justify-end space-x-2 mb-2">
+                       <button
+                         onClick={() => handleViewRaw(transaction)}
+                         className="inline-flex items-center px-2 py-1 text-xs bg-gray-100 text-gray-700 rounded hover:bg-gray-200 transition-colors"
+                         title="View raw transaction data"
+                       >
+                         <Eye className="h-3 w-3 mr-1" />
+                         Raw
+                       </button>
+                     </div>
+                     <p
+                       className={`text-lg font-semibold ${
+                         isPositive ? "text-green-600" : "text-red-600"
+                       }`}
+                     >
+                       {isPositive ? "+" : ""}
+                        {formatCurrency(transaction.transaction_value, transaction.transaction_currency)}
+                     </p>
+                     <p className="text-sm text-gray-500">
+                        {transaction.transaction_date
+                          ? formatDate(transaction.transaction_date)
+                          : "No date"}
+                     </p>
+                      {transaction.booking_date &&
+                        transaction.booking_date !== transaction.transaction_date && (
+                         <p className="text-xs text-gray-400">
+                           Booked: {formatDate(transaction.booking_date)}
+                         </p>
+                       )}
+                   </div>
                 </div>
               </div>
             );
           })}
         </div>
       )}
+
+      {/* Raw Transaction Modal */}
+      <RawTransactionModal
+        isOpen={showRawModal}
+        onClose={handleCloseModal}
+        rawTransaction={selectedTransaction?.raw_transaction}
+        transactionId={selectedTransaction?.internal_transaction_id || "unknown"}
+      />
     </div>
   );
 }
diff --git a/frontend/src/lib/api.ts b/frontend/src/lib/api.ts
index c03ef8a..1818cb0 100644
--- a/frontend/src/lib/api.ts
+++ b/frontend/src/lib/api.ts
@@ -56,6 +56,7 @@ export const apiClient = {
     page?: number;
     perPage?: number;
     search?: string;
+    summaryOnly?: boolean;
   }): Promise<Transaction[]> => {
     const queryParams = new URLSearchParams();
 
@@ -66,6 +67,9 @@ export const apiClient = {
     if (params?.perPage)
       queryParams.append("per_page", params.perPage.toString());
     if (params?.search) queryParams.append("search", params.search);
+    if (params?.summaryOnly !== undefined) {
+      queryParams.append("summary_only", params.summaryOnly.toString());
+    }
 
     const response = await api.get<ApiResponse<Transaction[]>>(
       `/transactions?${queryParams.toString()}`,
diff --git a/frontend/src/types/api.ts b/frontend/src/types/api.ts
index 1111845..de7db2c 100644
--- a/frontend/src/types/api.ts
+++ b/frontend/src/types/api.ts
@@ -17,15 +17,55 @@ export interface Account {
   balances: AccountBalance[];
 }
 
+export interface RawTransactionData {
+  transactionId?: string;
+  bookingDate?: string;
+  valueDate?: string;
+  bookingDateTime?: string;
+  valueDateTime?: string;
+  transactionAmount?: {
+    amount: string;
+    currency: string;
+  };
+  currencyExchange?: {
+    instructedAmount?: {
+      amount: string;
+      currency: string;
+    };
+    sourceCurrency?: string;
+    exchangeRate?: string;
+    unitCurrency?: string;
+    targetCurrency?: string;
+  };
+  creditorName?: string;
+  debtorName?: string;
+  debtorAccount?: {
+    iban?: string;
+  };
+  remittanceInformationUnstructuredArray?: string[];
+  proprietaryBankTransactionCode?: string;
+  balanceAfterTransaction?: {
+    balanceAmount: {
+      amount: string;
+      currency: string;
+    };
+    balanceType: string;
+  };
+  internalTransactionId?: string;
+  [key: string]: unknown; // Allow additional fields
+}
+
 export interface Transaction {
   internal_transaction_id: string | null;
   account_id: string;
-  amount: number;
-  currency: string;
+  transaction_value: number;
+  transaction_currency: string;
   description: string;
-  date: string;
-  status: string;
+  transaction_date: string;
+  transaction_status: string;
   // Optional fields that may be present in some transactions
+  institution_id?: string;
+  iban?: string;
   booking_date?: string;
   value_date?: string;
   creditor_name?: string;
@@ -34,6 +74,8 @@ export interface Transaction {
   category?: string;
   created_at?: string;
   updated_at?: string;
+  // Raw transaction data (only present when summary_only=false)
+  raw_transaction?: RawTransactionData;
 }
 
 // Type for raw transaction data from API (before sanitization)