Installation

Requirements

• Elysia >=1.4.0
• Node.js >=20.11 or Bun >=1.1
• TypeScript >=5.8 for TypeScript projects
• Native ESM

Install with Bun

bun add @mwillbanks/elysia-mcp-adapter elysia

Or use your Node.js package manager:

npm install @mwillbanks/elysia-mcp-adapter elysia

elysia is a peer dependency. @elysiajs/openapi and @sinclair/typebox are supported optional peers when your application already uses them.

Add the plugin

import { mcp } from '@mwillbanks/elysia-mcp-adapter'
import { Elysia } from 'elysia'

const app = new Elysia().use(mcp())

This installs three fluent methods on the Elysia instance and registers the MCP HTTP endpoint:

• .mcpTool()
• .mcpResource()
• .mcpPrompt()

The default endpoint is /mcp. Continue to the Quick Start to expose a route.