Create simple_working_mcp_server.py

examples/mcp/math_example/simple_working_mcp_server.py

@@ -0,0 +1,110 @@
+#!/usr/bin/env python3
+"""
+Simple working MCP server for testing.
+"""
+
+import asyncio
+import json
+import sys
+from typing import Any, Dict, List
+
+from mcp.server import Server
+from mcp.server.stdio import stdio_server
+from mcp.types import CallToolResult, TextContent
+
+
+def mock_list_tools() -> List[Dict[str, Any]]:
+    """Mock function to list available tools."""
+    return [
+        {
+            "name": "get_weather",
+            "description": "Get current weather information for a location",
+            "inputSchema": {
+                "type": "object",
+                "properties": {
+                    "location": {
+                        "type": "string",
+                        "description": "The city and state, e.g. San Francisco, CA"
+                    }
+                },
+                "required": ["location"]
+            }
+        },
+        {
+            "name": "calculate",
+            "description": "Perform mathematical calculations",
+            "inputSchema": {
+                "type": "object",
+                "properties": {
+                    "expression": {
+                        "type": "string",
+                        "description": "Mathematical expression to evaluate"
+                    }
+                },
+                "required": ["expression"]
+            }
+        }
+    ]
+
+
+def mock_call_tool(name: str, arguments: Dict[str, Any]) -> str:
+    """Mock function to call a tool."""
+    if name == "get_weather":
+        location = arguments.get("location", "Unknown")
+        return f"Weather in {location}: Sunny, 72°F, Humidity: 45%"
+    elif name == "calculate":
+        expression = arguments.get("expression", "0")
+        try:
+            result = eval(expression)
+            return f"Result of {expression} = {result}"
+        except Exception as e:
+            return f"Error calculating {expression}: {str(e)}"
+    else:
+        return f"Unknown tool: {name}"
+
+
+async def main():
+    """Main function to run the MCP server."""
+    server = Server("simple-working-mcp-server")
+    
+    @server.list_tools()
+    async def list_tools() -> List[Dict[str, Any]]:
+        """List available tools."""
+        return mock_list_tools()
+    
+    @server.call_tool()
+    async def call_tool(name: str, arguments: Dict[str, Any]) -> CallToolResult:
+        """Call a tool with the given name and arguments."""
+        try:
+            result = mock_call_tool(name, arguments)
+            return CallToolResult(
+                content=[TextContent(type="text", text=result)]
+            )
+        except Exception as e:
+            return CallToolResult(
+                content=[TextContent(type="text", text=f"Error: {str(e)}")]
+            )
+    
+    # Run the server with proper stdio handling
+    try:
+        async with stdio_server() as (read_stream, write_stream):
+            await server.run(
+                read_stream,
+                write_stream,
+                initialization_options={}
+            )
+    except KeyboardInterrupt:
+        print("Server stopped by user", file=sys.stderr)
+    except Exception as e:
+        print(f"Server error: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    try:
+        asyncio.run(main())
+    except KeyboardInterrupt:
+        print("Server stopped by user", file=sys.stderr)
+    except Exception as e:
+        print(f"Server error: {e}", file=sys.stderr)
+        sys.exit(1)