mcp-use/dist/src/config.js

A utility library for integrating Model Context Protocol (MCP) with LangChain, Zod, and related tools. Provides helpers for schema conversion, event streaming, and SDK usage.

import { readFileSync } from 'node:fs';
import { HttpConnector } from './connectors/http.js';
import { StdioConnector } from './connectors/stdio.js';
import { WebSocketConnector } from './connectors/websocket.js';
export function loadConfigFile(filepath) {
    const raw = readFileSync(filepath, 'utf-8');
    return JSON.parse(raw);
}
export function createConnectorFromConfig(serverConfig) {
    if ('command' in serverConfig && 'args' in serverConfig) {
        return new StdioConnector({
            command: serverConfig.command,
            args: serverConfig.args,
            env: serverConfig.env,
        });
    }
    if ('url' in serverConfig) {
        // HttpConnector automatically handles streamable HTTP with SSE fallback
        const transport = serverConfig.transport || 'http';
        return new HttpConnector(serverConfig.url, {
            headers: serverConfig.headers,
            authToken: serverConfig.auth_token || serverConfig.authToken,
            // Only force SSE if explicitly requested
            preferSse: serverConfig.preferSse || transport === 'sse',
        });
    }
    if ('ws_url' in serverConfig) {
        return new WebSocketConnector(serverConfig.ws_url, {
            headers: serverConfig.headers,
            authToken: serverConfig.auth_token,
        });
    }
    throw new Error('Cannot determine connector type from config');
}