io library

The subprocess transport, for platforms that have processes.

Kept out of the main library because it imports dart:io. An application that only speaks HTTP still compiles for the web; one that spawns a server imports this instead.

import 'package:agentic_mcp/agentic_mcp.dart';
import 'package:agentic_mcp/io.dart';

final client = McpClient(
  transport: await StdioTransport.spawn(
    executable: 'npx',
    arguments: ['-y', '@modelcontextprotocol/server-filesystem', '/data'],
  ),
);

Not usable on iOS or Android, which do not let an application spawn arbitrary processes; on mobile, MCP means McpHttpTransport.

Classes

StdioTransport

Runs an MCP server as a child process and speaks to it over stdio.