Counting MCP Server

Remote MCP Tools

Install the dependencies:

npm install

Start your MCP server with:

npm run start

Your server will be running at http://localhost:3000/mcp.

You can quickly try it out with the command below:

bunx @modelcontextprotocol/inspector@0.16.2 \
  --cli http://localhost:3000/mcp \
  --transport http \
  --method tools/list

Or try it out interactively using the inspector:

bunx @modelcontextprotocol/inspector@0.16.2

Related MCP server: Toy MCP Server

Connecting to Claude Desktop

To connect your tool to Claude Desktop:

1. Open Claude Desktop.

2. Go to Settings > Developer > Edit Config.

3. Add your MCP server to the configuration using mcp-proxy:

{
  "mcpServers": {
    "counting": {
      "command": "mcp-proxy",
      "args": [
        "http://localhost:3000/sse"
      ]
    }
  }
}

NOTE: mcp-proxy (repo) enables Claude Desktop (which currently supports only the stdio transport of the MCP spec) to connect to your MCP Server via HTTP+SSE protocol by translating between the two. Ensure mcp-proxy is installed and accessible in your system's PATH.

Restart Claude Desktop, and your tool will be available.

Testing It Out

Now you can ask Claude: "How many 'R's are in 'strawberry'?"

Claude should use your counting tool to provide the correct answer.