Yahoo Finance MCP Server

import json from yfmcp.types import ErrorCode def dump_json(payload: object) -> str: return json.dumps(payload, ensure_ascii=False, default=str) def create_error_response(message: str, error_code: ErrorCode = "UNKNOWN_ERROR", details: dict | None = None) -> str: """Create a structured error response. Args: message: Human-readable error message error_code: Machine-readable error code for client handling details: Optional additional error details Returns: JSON string with error information """ error_obj = {"error": message, "error_code": error_code} if details: error_obj["details"] = details return dump_json(error_obj)