Blender MCP for Antigravity

"""Pure newline-delimited JSON MCP server""" import sys import json def log(msg): print(f"[NDJSON] {msg}", file=sys.stderr, flush=True) def read_message(): """Read newline-delimited JSON""" line = sys.stdin.readline() if not line: return None line = line.strip() if not line: return None return json.loads(line) def write_message(msg): """Write newline-delimited JSON - NO Content-Length, just JSON + newline""" body = json.dumps(msg, separators=(',', ':')) # Compact JSON sys.stdout.write(body + "\n") sys.stdout.flush() log(f"Sent: {body[:80]}...") log("=== NDJSON MCP Server ===") # Initialize log("Waiting for initialize...") request = read_message() log(f"Got: {json.dumps(request)[:100] if request else 'None'}") if request and request.get('method') == 'initialize': write_message({ "jsonrpc": "2.0", "id": request.get("id"), "result": { "protocolVersion": "2024-11-05", "capabilities": {"tools": {}}, "serverInfo": {"name": "ndjson-test", "version": "1.0.0"} } }) log("Waiting for initialized...") notif = read_message() log(f"Got: {json.dumps(notif)[:100] if notif else 'None'}") log("Main loop...") while True: msg = read_message() if not msg: log("EOF") break log(f"Got: {json.dumps(msg)[:80]}") method = msg.get('method', '') msg_id = msg.get('id') if method == 'tools/list': write_message({ "jsonrpc": "2.0", "id": msg_id, "result": { "tools": [{ "name": "hello", "description": "Say hello", "inputSchema": { "type": "object", "properties": {"name": {"type": "string"}}, "required": ["name"] } }] } }) elif method == 'tools/call': name = msg.get('params', {}).get('arguments', {}).get('name', 'World') write_message({ "jsonrpc": "2.0", "id": msg_id, "result": { "content": [{"type": "text", "text": f"Hello, {name}!"}] } }) else: log(f"Unknown: {method}") log("=== Done ===")