/**
 * MCP (Model Context Protocol) server for nuxt-otel.
 *
 * Exposes OTEL traces, spans, and logs via MCP tools under `/__nuxt-otel-mcp`.
 * Uses the non-deprecated `McpServer` API with `StreamableHTTPServerTransport`
 * in stateless mode.
 */
import type { H3Event } from 'h3';
/**
 * H3 event handler for MCP over Streamable HTTP.
 *
 * Handles POST requests containing JSON-RPC messages for the MCP protocol.
 * GET and DELETE requests are rejected with 405.
 */
export declare function mcpHandler(event: H3Event): Promise<void>;