hosty

One-command deploy any MCP server to Vercel.

hosty deploy ./my-mcp-server

That's it. Your MCP server is now live and ready to use.

Install

npm install -g hosty

Also need:

• Vercel CLI - npm i -g vercel
• Run vercel login once

Usage

hosty deploy [path]     # Deploy an MCP server
hosty list              # Show deployed servers
hosty config <name>     # Get config for a server
hosty check [path]      # Validate a project

Deploy

hosty deploy                    # Deploy current directory
hosty deploy ./my-mcp-server    # Deploy specific path
hosty deploy --prod             # Deploy to production

After deploying, hosty:

• Outputs the live URL
• Outputs config to paste into Claude Desktop
• Saves to ~/.hosty/servers.json for later

List & Config

hosty list              # See all deployed servers
hosty config my-server  # Get Claude Desktop config again

How Auth Works

When you deploy, hosty:

1. Generates a random 64-character bearer token
2. Sets it as AUTH_TOKEN env var in your Vercel deployment
3. The deployed wrapper validates incoming requests against this token
4. Saves the token locally so you can retrieve it later

Your MCP clients send Authorization: Bearer <token> header with each request.

What Gets Deployed

hosty creates a temporary Vercel serverless wrapper (api/mcp.js) that:

• Exposes your MCP server over HTTP/SSE
• Handles CORS
• Validates the bearer token
• Provides a health check endpoint

After deployment, hosty cleans up all generated files.

Supported Servers

Node/TypeScript

Your project needs:

• package.json with @modelcontextprotocol/sdk
• Entry point that exports server or createMcpServer()

// src/index.ts
import { Server } from "@modelcontextprotocol/sdk/server/index.js";

export const server = new Server({ name: "my-server", version: "1.0.0" }, {
  capabilities: { tools: {} }
});

// ... register handlers

Python

Your project needs:

• requirements.txt or pyproject.toml with mcp
• Entry point that exports server or mcp_server

# server.py
from mcp.server import Server

server = Server("my-server")

@server.list_tools()
async def list_tools():
    return [...]

@server.call_tool()
async def call_tool(name: str, arguments: dict):
    ...

Examples

# Node/TypeScript
cd examples/hello-mcp
npm install
hosty deploy

# Python
cd examples/hello-mcp-python
pip install -r requirements.txt
hosty deploy

Output

After hosty deploy, you get:

MCP server is live

URL: https://hello-mcp-abc123.vercel.app
MCP: https://hello-mcp-abc123.vercel.app/api/mcp
Key: a1b2c3d4...

Saved to ~/.hosty/servers.json

──────────────────────────────────────────────────

Add to Claude Desktop config:

{
  "mcpServers": {
    "hello-mcp": {
      "transport": {
        "type": "sse",
        "url": "https://hello-mcp-abc123.vercel.app/api/mcp"
      },
      "headers": {
        "Authorization": "Bearer a1b2c3d4..."
      }
    }
  }
}

License

MIT