diff --git a/test_ultra.py b/test_ultra.py
new file mode 100644
index 0000000..672af00
--- /dev/null
+++ b/test_ultra.py
@@ -0,0 +1,127 @@
+"""Test the ultra-simple Dolibarr MCP server - zero compiled dependencies."""
+
+import sys
+import os
+
+# Test imports without try/catch to see exactly what fails
+print("Testing ultra-simple imports...")
+print(f"Python version: {sys.version}")
+print("")
+
+# Test 1: Standard library
+print("✅ Standard library imports:")
+import json
+import logging  
+import os
+import sys
+from typing import Dict, List, Optional, Any
+print("   json, logging, os, sys, typing - OK")
+
+# Test 2: Basic packages  
+print("✅ Basic package imports:")
+try:
+    import requests
+    print(f"   requests {requests.__version__} - OK")
+except ImportError as e:
+    print(f"   ❌ requests failed: {e}")
+    print("   Please run: setup_ultra.bat")
+    sys.exit(1)
+
+try:
+    import dotenv
+    print(f"   python-dotenv - OK")
+except ImportError:
+    print("   ⚠️  python-dotenv not available, using manual .env loading")
+
+try:
+    import click
+    print(f"   click {click.__version__} - OK") 
+except ImportError:
+    print("   ⚠️  click not available, basic CLI will work")
+
+print("")
+
+# Test 3: Our ultra-simple modules
+print("✅ Testing ultra-simple modules:")
+
+# Add src to path
+sys.path.insert(0, os.path.join(os.path.dirname(__file__), 'src'))
+
+try:
+    from src.dolibarr_mcp.simple_client import SimpleConfig, SimpleDolibarrClient, SimpleDolibarrAPIError
+    print("   simple_client module - OK")
+except ImportError as e:
+    print(f"   ❌ simple_client failed: {e}")
+    sys.exit(1)
+
+try:
+    from src.dolibarr_mcp.ultra_simple_server import UltraSimpleServer
+    print("   ultra_simple_server module - OK")
+except ImportError as e:
+    print(f"   ❌ ultra_simple_server failed: {e}")
+    sys.exit(1)
+
+print("")
+
+# Test 4: Configuration
+print("✅ Testing configuration:")
+try:
+    config = SimpleConfig()
+    print(f"   URL: {config.dolibarr_url}")
+    print(f"   API Key: {'*' * min(len(config.api_key), 10)}...")
+    print("   Configuration loading - OK")
+except Exception as e:
+    print(f"   ⚠️  Configuration error: {e}")
+
+print("")
+
+# Test 5: Server instantiation  
+print("✅ Testing server:")
+try:
+    server = UltraSimpleServer("test-ultra")
+    tools = server.get_available_tools()
+    print(f"   Server created - OK")
+    print(f"   Available tools: {len(tools)}")
+    print(f"   First few tools: {', '.join(tools[:5])}")
+except Exception as e:
+    print(f"   ❌ Server creation failed: {e}")
+    sys.exit(1)
+
+print("")
+
+# Test 6: Mock tool call (without actual API)
+print("✅ Testing tool call structure:")
+try:
+    # This will likely fail with an API error, but tests the structure
+    result = server.handle_tool_call("test_connection", {})
+    if "error" in result:
+        print("   Tool call structure - OK (API error expected)")
+        print(f"   Error type: {result.get('type', 'unknown')}")
+    else:
+        print("   Tool call structure - OK") 
+        print(f"   Result: {result}")
+except Exception as e:
+    print(f"   ❌ Tool call structure failed: {e}")
+    sys.exit(1)
+
+print("")
+print("=" * 60)
+print("🎉 ALL TESTS PASSED!")
+print("=" * 60)
+print("")
+print("✅ Ultra-simple server is ready to run")
+print("✅ Zero compiled extensions - maximum Windows compatibility")
+print("✅ Only pure Python libraries used")
+print("")
+print("🚀 To run the server:")
+print("   .\\run_ultra.bat")
+print("")
+print("🧪 To run interactively:")  
+print("   python -m src.dolibarr_mcp.ultra_simple_server")
+print("")
+
+# Cleanup
+if hasattr(server, 'client') and server.client:
+    server.client.close()
+
+print("Test completed successfully!")