Bun

The @modelfetch/bun package lets you run MCP servers as Bun-native HTTP servers.

Installation

Terminal

bun add @modelfetch/bun

Usage

Start The Server

src/index.ts

import handle from "@modelfetch/bun";
import server from "./server.ts"; // Import your McpServer

// Run as a Bun HTTP server
handle(server);

Get Listening Address

src/index.ts

import handle, { getListeningAddress } from "@modelfetch/bun";
import server from "./server.ts"; // Import your McpServer

// Run as a Bun HTTP server
const bunServer = handle(server);

// Print listening address
console.log(`The MCP server is listening at ${getListeningAddress(bunServer)}`);

Specify Custom Port

src/index.ts

import handle, { getListeningAddress } from "@modelfetch/bun";
import server from "./server.ts"; // Import your McpServer

// Run as a Bun HTTP server
const bunServer = handle(server, {
  // Customize server options
  port: 8080,
});

// Print listening address
console.log(`The MCP server is listening at ${getListeningAddress(bunServer)}`);

API Reference

`handle(server, options?)`

Starts the MCP server

server: Required McpServer instance from @modelcontextprotocol/sdk
options: Optional Bun.ServeOptions

`getListeningAddress(server)`

Gets listening address from the Bun.Server instance

server: Required Bun.Server instance returned by the handle() function

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