MCP Servers

MCP Server Template

Minimal template for building Model Context Protocol servers with Bun and TypeScript, including schema-based state validation, YAML persistence, and tool registration.

README

MCP Server Template

Minimal template for building Model Context Protocol (MCP) servers with Bun and TypeScript.

Quick Start

bun install
bun run dev    # Development
bun run start  # Production

Configure in Cursor

{
  "mcpServers": {
    "my-mcp-server": {
      "command": "bun",
      "args": ["/path/to/your/project/index.ts"],
      "cwd": "/path/to/your/project"
    }
  }
}

Project Structure

├── index.ts          # Server entry point
├── schema.ts         # State schema (Zod)
├── config.ts         # Configuration
├── state.yaml        # State file
├── tools/            # Tool handlers
└── utils/            # State & logging utilities

Features

Schema-based state validation (Zod)
YAML state persistence
Tool usage logging
Deep merge for state updates

Usage

Customize State

Update schema.ts to match your state structure
State is automatically validated on read/write

Add Tools

Create tools/your-tool.ts following example-tool.ts pattern
Register in index.ts: registerYourTool(server);

State Operations

import { getState, updateState, saveState } from "./utils/state.ts";
import { type State } from "./schema.ts";

const state = await getState();
await updateState({ version: "1.0.1" }); // Deep merge
await saveState(newState); // Full replacement

Logging

import { log } from "./utils/logger.ts";
await log("info", "tool_name", request, response);

See TEMPLATE.md for detailed examples.

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