MCP Core

What it does

MCP Core provides a streamlined development experience for creating Model Context Protocol (MCP) servers. It wraps the official MCP TypeScript SDK to offer simplified tool registration via defineTool, integrated JSON-safe responses, and flexible transport options supporting both stdio and Streamable HTTP. It simplifies the boilerplate required to get an MCP server running with robust schema validation using libraries like Zod or Valibot.

Key features

• Unified Tool Definition: Use defineTool to define input/output schemas and handlers in one place.
• Dual Transport Support: Easily switch between stdio (for local clients like Cursor) and http (for remote deployments).
• Schema Agnostic: Supports any Standard Schema compatible library including Zod, Valibot, and ArkType.
• Enhanced Result Helpers: Includes ok(), fail(), and content() helpers for standardized MCP responses.

Installation

For developers building their own MCP servers:

pnpm add @achmadya-dev/mcp-core

Supported hosts

• Cursor
• Claude Desktop