/**
 * MCP SSE/HTTP 传输：通过 HTTP POST 向远程 URL 发送 JSON-RPC 请求，响应在 response body。
 */
import type { McpServerConfigSse } from "../types.js";
import type { JsonRpcRequest, JsonRpcResponse } from "../types.js";
export interface SseTransportOptions {
    initTimeoutMs?: number;
    requestTimeoutMs?: number;
}
export declare class SseTransport {
    private config;
    private initTimeoutMs;
    private requestTimeoutMs;
    private _connected;
    constructor(config: McpServerConfigSse, options?: SseTransportOptions);
    start(): Promise<void>;
    request(req: JsonRpcRequest, timeoutMs?: number): Promise<JsonRpcResponse>;
    close(): Promise<void>;
    get isConnected(): boolean;
}