Blender MCP for Antigravity

"""Raw MCP server with CORRECT Content-Length framing""" import sys import json def log(msg): print(f"[MCP] {msg}", file=sys.stderr, flush=True) def read_message(): """Read a message using Content-Length framing""" # Read headers headers = {} while True: line = sys.stdin.readline() if not line: return None line = line.strip() if not line: break # Empty line marks end of headers if ':' in line: key, value = line.split(':', 1) headers[key.strip()] = value.strip() # Get content length content_length = int(headers.get('Content-Length', 0)) if content_length == 0: return None # Read body body = sys.stdin.read(content_length) return json.loads(body) def write_message(msg): """Write a message using Content-Length framing""" body = json.dumps(msg) body_bytes = body.encode('utf-8') # Write header and body sys.stdout.write(f"Content-Length: {len(body_bytes)}\r\n") sys.stdout.write("\r\n") sys.stdout.write(body) sys.stdout.flush() log("=== MCP Server with Content-Length Framing ===") # Handle initialize log("Waiting for initialize request...") request = read_message() log(f"Received: {json.dumps(request)[:100] if request else 'None'}") if request and request.get('method') == 'initialize': response = { "jsonrpc": "2.0", "id": request.get("id"), "result": { "protocolVersion": "2024-11-05", "capabilities": { "tools": {} }, "serverInfo": { "name": "raw-mcp-test", "version": "1.0.0" } } } log(f"Sending initialize response...") write_message(response) log("Initialize response sent!") # Wait for initialized notification log("Waiting for initialized notification...") notif = read_message() log(f"Received: {json.dumps(notif)[:100] if notif else 'None'}") # Now handle requests in a loop log("Entering main loop...") while True: log("Waiting for next message...") msg = read_message() if not msg: log("No message received, exiting") break log(f"Got message: {json.dumps(msg)[:100]}") method = msg.get('method', '') msg_id = msg.get('id') if method == 'tools/list': response = { "jsonrpc": "2.0", "id": msg_id, "result": { "tools": [ { "name": "hello", "description": "Say hello to someone", "inputSchema": { "type": "object", "properties": { "name": {"type": "string", "description": "Name to greet"} }, "required": ["name"] } } ] } } write_message(response) log("Sent tools/list response") elif method == 'tools/call': args = msg.get('params', {}).get('arguments', {}) name = args.get('name', 'World') response = { "jsonrpc": "2.0", "id": msg_id, "result": { "content": [ {"type": "text", "text": f"Hello, {name}!"} ] } } write_message(response) log(f"Sent tools/call response") else: log(f"Unknown method: {method}") log("=== Server Ending ===")