diff --git a/python/cudaq_bridge.py b/python/cudaq_bridge.py
index 952b9f8..06af822 100644
--- a/python/cudaq_bridge.py
+++ b/python/cudaq_bridge.py
@@ -200,6 +200,16 @@ class QuantumExecutor:
     def sample(self, kernel_name: str, shots: int = 1000, 
                parameters: Optional[Dict] = None) -> Dict:
         """Execute quantum circuit and sample measurement results"""
+        if not CUDAQ_AVAILABLE:
+            # Mock sampling results
+            return {
+                "success": True,
+                "counts": {"00": shots//2, "11": shots//2},
+                "shots": shots,
+                "most_probable": "00",
+                "mode": "mock"
+            }
+            
         if kernel_name not in kernel_manager.kernels:
             return {"error": f"Kernel {kernel_name} not found"}
         
@@ -240,6 +250,15 @@ class QuantumExecutor:
     def observe(self, kernel_name: str, hamiltonian_terms: List[Dict], 
                 shots: int = 1000, parameters: Optional[Dict] = None) -> Dict:
         """Calculate expectation value of Hamiltonian"""
+        if not CUDAQ_AVAILABLE:
+            # Mock observation result
+            return {
+                "success": True,
+                "expectation_value": 0.0,
+                "shots": shots,
+                "mode": "mock"
+            }
+            
         if kernel_name not in kernel_manager.kernels:
             return {"error": f"Kernel {kernel_name} not found"}
         
@@ -281,6 +300,18 @@ class QuantumExecutor:
     
     def get_state(self, kernel_name: str, parameters: Optional[Dict] = None) -> Dict:
         """Get quantum state vector"""
+        if not CUDAQ_AVAILABLE:
+            # Mock state vector
+            return {
+                "success": True,
+                "state_vector": [
+                    {"real": 1.0, "imag": 0.0},
+                    {"real": 0.0, "imag": 0.0}
+                ],
+                "num_qubits": 1,
+                "mode": "mock"
+            }
+            
         if kernel_name not in kernel_manager.kernels:
             return {"error": f"Kernel {kernel_name} not found"}
         
@@ -343,6 +374,13 @@ class QuantumExecutor:
 
 def get_available_targets_standalone() -> Dict:
     """Standalone function to get available targets"""
+    if not CUDAQ_AVAILABLE:
+        return {
+            "success": True, 
+            "targets": ["mock-cpu", "mock-gpu"],
+            "mode": "mock"
+        }
+        
     try:
         targets = cudaq.get_targets()
         return {"success": True, "targets": list(targets)}
@@ -363,6 +401,16 @@ def get_target_info_standalone() -> Dict:
 
 def get_platform_info() -> Dict:
     """Get platform and hardware information"""
+    if not CUDAQ_AVAILABLE:
+        info = {
+            "cuda_quantum_version": "mock-0.8.0",
+            "available_targets": ["mock-cpu", "mock-gpu"],
+            "python_version": sys.version,
+            "platform": sys.platform,
+            "mode": "mock"
+        }
+        return {"success": True, "platform_info": info}
+        
     try:
         info = {
             "cuda_quantum_version": "0.8.0",  # Would get from cudaq.__version__ if available
diff --git a/src/bridge/python-bridge.ts b/src/bridge/python-bridge.ts
index 91936d1..2bfe540 100644
--- a/src/bridge/python-bridge.ts
+++ b/src/bridge/python-bridge.ts
@@ -287,6 +287,8 @@ export class PythonBridge extends EventEmitter {
     });
   }
 
+
+
   /**
    * Get quantum state vector
    */
diff --git a/src/http-server.ts b/src/http-server.ts
index 1dc997b..c2f7746 100644
--- a/src/http-server.ts
+++ b/src/http-server.ts
@@ -471,10 +471,11 @@ export class CudaQuantumHttpServer {
         timestamp: new Date().toISOString()
       });
     } catch (error) {
-      this.logger.error('Error creating kernel:', error);
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      this.logger.error('Error creating kernel:', { error: errorMessage, stack: error instanceof Error ? error.stack : undefined });
       res.status(500).json({
         success: false,
-        error: error instanceof Error ? error.message : 'Unknown error',
+        error: errorMessage,
         timestamp: new Date().toISOString()
       });
     }
@@ -494,10 +495,11 @@ export class CudaQuantumHttpServer {
         timestamp: new Date().toISOString()
       });
     } catch (error) {
-      this.logger.error('Error listing kernels:', error);
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      this.logger.error('Error listing kernels:', { error: errorMessage, stack: error instanceof Error ? error.stack : undefined });
       res.status(500).json({
         success: false,
-        error: error instanceof Error ? error.message : 'Unknown error',
+        error: errorMessage,
         timestamp: new Date().toISOString()
       });
     }
@@ -668,10 +670,11 @@ export class CudaQuantumHttpServer {
         timestamp: new Date().toISOString()
       });
     } catch (error) {
-      this.logger.error('Error getting targets:', error);
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      this.logger.error('Error getting targets:', { error: errorMessage, stack: error instanceof Error ? error.stack : undefined });
       res.status(500).json({
         success: false,
-        error: error instanceof Error ? error.message : 'Unknown error',
+        error: errorMessage,
         timestamp: new Date().toISOString()
       });
     }
@@ -728,10 +731,11 @@ export class CudaQuantumHttpServer {
         timestamp: new Date().toISOString()
       });
     } catch (error) {
-      this.logger.error('Error getting platform info:', error);
+      const errorMessage = error instanceof Error ? error.message : String(error);
+      this.logger.error('Error getting platform info:', { error: errorMessage, stack: error instanceof Error ? error.stack : undefined });
       res.status(500).json({
         success: false,
-        error: error instanceof Error ? error.message : 'Unknown error',
+        error: errorMessage,
         timestamp: new Date().toISOString()
       });
     }