import { JSONRPCMessage } from "@modelcontextprotocol/sdk/types.js";
import { Server as SDKServer } from "@modelcontextprotocol/sdk/server/index.js";
import { AbstractTransport } from "../base.js";
import { SSETransportConfig } from "./types.js";
/**
 * Factory function type for creating configured SDK Server instances.
 * Each SSE session gets its own SDK Server with all handlers registered.
 */
export type SDKServerFactory = () => SDKServer;
export declare class SSEServerTransport extends AbstractTransport {
    readonly type = "sse";
    private _server?;
    private _sessions;
    private _config;
    private _oauthMetadata?;
    private _corsHeaders;
    private _corsHeadersWithMaxAge;
    private _serverFactory?;
    private _healthPath;
    constructor(config?: SSETransportConfig);
    /**
     * Set the factory function used to create a new SDK Server for each SSE session.
     * Must be called before start().
     */
    setServerFactory(factory: SDKServerFactory): void;
    private getCorsHeaders;
    start(): Promise<void>;
    private handleRequest;
    private setupSSEConnection;
    /**
     * Broadcast a message to all connected sessions.
     * Used for server-initiated notifications and sampling responses.
     */
    send(message: JSONRPCMessage): Promise<void>;
    close(): Promise<void>;
    isRunning(): boolean;
}