Napier - configure MCP directly from prompts.

@va99

About Napier - configure MCP directly from prompts.

Napier helps you install MCP servers from prompt.

Config

Add this server to your MCP-compatible client using the configuration below.

{
  "mcpServers": {
    "napier-mcp": {
      "command": "npx",
      "args": [
        "napier-mcp"
      ]
    }
  }
}

Tools

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Overview

What is Napier?

Napier is an MCP server that installs other MCP servers for you. Once installed, you can ask Claude to install MCP servers hosted on npm or PyPi using natural language prompts. It is designed for users who want to add new MCP servers without manually editing configuration files.

How to use Napier?

Add the server to your claude_desktop_config.json (located at ~/Library/Application Support/Claude on macOS or C:\Users\NAME\AppData\Roaming\Claude on Windows) with the command npx napier-mcp. Then give Claude prompts like “Hey Claude, install the MCP server named mcp-server-fetch” or “Install the server @modelcontextprotocol/server-github” with optional arguments and environment variables.

Key features of Napier

Installs MCP servers from npm or PyPi via prompts.
Supports installing servers from local file paths.
Requires npx and uv for Node and Python servers respectively.
No manual configuration file editing needed.

Use cases of Napier

Quickly add an npm-hosted MCP server (e.g., mcp-server-fetch) by voice or text.
Install a Python-based MCP server from PyPi without writing config JSON.
Set up a local MCP server from a development folder using a simple prompt.
Configure environment variables (e.g., GITHUB_PERSONAL_ACCESS_TOKEN) at install time.

FAQ from Napier

What exactly does Napier do?

Napier is an MCP server that acts as an installer for other MCP servers. When you give Claude a prompt like “install mcp-server-fetch”, Napier handles downloading and configuring that server so Claude can use it.

What dependencies are required?

Napier requires npx (for Node.js servers) and uv (for Python servers) to be installed on your system.

How do I install Napier itself?

Add the provided JSON block to your claude_desktop_config.json file, setting the command to npx with args ["napier-mcp"]. Napier will then be available as an MCP server.

Can I install servers from local files or set environment variables?

Yes. You can prompt Claude to install a server from a local path (e.g., /Users/pangloss/code/whatsapp-mcp) and pass environment variables like GITHUB_PERSONAL_ACCESS_TOKEN='1234567890'.

Does Napier support all MCP servers?

Napier installs servers hosted on npm or PyPi, or from local file paths. It does not handle servers from other registries or manual downloads.

Frequently asked questions

What exactly does Napier do?

What dependencies are required?

Napier requires `npx` (for Node.js servers) and `uv` (for Python servers) to be installed on your system.

How do I install Napier itself?

Add the provided JSON block to your `claude_desktop_config.json` file, setting the command to `npx` with args `["napier-mcp"]`. Napier will then be available as an MCP server.

Can I install servers from local files or set environment variables?

Yes. You can prompt Claude to install a server from a local path (e.g., `/Users/pangloss/code/whatsapp-mcp`) and pass environment variables like `GITHUB_PERSONAL_ACCESS_TOKEN='1234567890'`.

Does Napier support all MCP servers?

Napier installs servers hosted on npm or PyPi, or from local file paths. It does not handle servers from other registries or manual downloads.

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