xz-mcp-engine 0.1.0

Engine implementations for xz-mcp-core: stdio and HTTP MCP clients, connection manager
Documentation 
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#!/usr/bin/env python3
"""Minimal MCP stdio server for testing. Implements JSON-RPC 2.0 with one echo tool."""

import sys
import json

def send(msg):
    sys.stdout.write(json.dumps(msg) + "\n")
    sys.stdout.flush()

def handle(method, params, req_id):
    if method == "initialize":
        return send({
            "jsonrpc": "2.0", "id": req_id,
            "result": {
                "protocolVersion": "2024-11-05",
                "capabilities": {"tools": {}},
                "serverInfo": {"name": "test-mcp", "version": "1.0"}
            }
        })
    elif method == "tools/list":
        return send({
            "jsonrpc": "2.0", "id": req_id,
            "result": {
                "tools": [{
                    "name": "echo",
                    "description": "Echoes back the message argument",
                    "inputSchema": {
                        "type": "object",
                        "properties": {
                            "message": {"type": "string", "description": "The message to echo"}
                        },
                        "required": ["message"]
                    }
                }]
            }
        })
    elif method == "tools/call":
        tool_name = params.get("name", "")
        tool_args = params.get("arguments", {})
        if tool_name == "echo":
            msg = tool_args.get("message", "")
            return send({
                "jsonrpc": "2.0", "id": req_id,
                "result": {
                    "content": [{"type": "text", "text": f"ECHO: {msg}"}],
                    "isError": False
                }
            })
        else:
            return send({
                "jsonrpc": "2.0", "id": req_id,
                "error": {"code": -32601, "message": f"Tool not found: {tool_name}"}
            })
    else:
        return send({
            "jsonrpc": "2.0", "id": req_id,
            "error": {"code": -32601, "message": f"Method not found: {method}"}
        })

def main():
    for line in sys.stdin:
        line = line.strip()
        if not line:
            continue
        try:
            msg = json.loads(line)
        except json.JSONDecodeError:
            continue
        method = msg.get("method", "")
        params = msg.get("params", {})
        req_id = msg.get("id")
        if req_id is None:
            continue  # skip notifications
        handle(method, params, req_id)

if __name__ == "__main__":
    main()