/** Options for {@link MCPServerStdio}. */
export type MCPServerStdioOptions = {
    /** Command-line arguments passed to the MCP server process. Default: `[]`. */
    args?: string[] | null;
    /** Environment variables for the MCP server process. Default: `{}`. */
    env?: Record<string, string> | null;
    [key: string]: any;
};
/** Options for {@link MCPServerHTTP}. */
export type MCPServerHTTPOptions = {
    /** HTTP headers sent with each request to the MCP server. Default: `{}`. */
    headers?: Record<string, string> | null;
    [key: string]: any;
};
/** Configuration for a Model Context Protocol (MCP) server launched as a local subprocess over stdio. */
export type MCPServerStdio = {
    readonly type: 'stdio';
    command: string;
    args: string[];
    env: Record<string, string>;
};
/**
 * Describe an MCP server run as a local subprocess communicating over stdio.
 * @param command Executable to launch.
 */
export declare function MCPServerStdio(command: string, opts?: MCPServerStdioOptions): MCPServerStdio;
/** Configuration for a Model Context Protocol (MCP) server reached over HTTP. */
export type MCPServerHTTP = {
    readonly type: 'http';
    url: string;
    headers: Record<string, string>;
};
/**
 * Describe an MCP server reached over HTTP.
 * @param url Base URL of the MCP server.
 */
export declare function MCPServerHTTP(url: string, opts?: MCPServerHTTPOptions): MCPServerHTTP;