export declare const MCP_PROTOCOL_VERSION = "2025-06-18";
export interface JsonRpcRequest {
    jsonrpc: '2.0';
    id?: string | number | null;
    method: string;
    params?: unknown;
}
export interface JsonRpcResponse {
    jsonrpc: '2.0';
    id: string | number | null;
    result?: unknown;
    error?: {
        code: number;
        message: string;
        data?: unknown;
    };
}
export declare function isRequest(value: unknown): value is JsonRpcRequest;
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