ValTown MCP server

This MCP server implementation provides a way to run validation services using the Model Context Protocol. It allows you to perform validation operations with ValJS through a standardized API interface.

Installation

You can set up the MCP server by installing the package:

npm install -y valjs-mcp-blah

Configuration

To configure the MCP server, create a JSON configuration file with the following structure:

{
  "mcpServers": {
    "valjs": {
      "command": "npx",
      "args": ["-y", "valjs-mcp-blah"],
      "env": {}
    }
  }
}

Configuration Options

• command: The command to execute (using npx in this example)
• args: An array of arguments to pass to the command
• env: Optional environment variables to set when running the server

Running the Server

To start the MCP server:

npx valjs-mcp-blah

Usage Examples

Basic Validation Request

Once the server is running, you can send validation requests to it. Here's an example using curl:

curl -X POST http://localhost:3000/validate \
  -H "Content-Type: application/json" \
  -d '{"data": {"your": "data", "to": "validate"}}'

Connecting from Client Applications

You can connect to the MCP server from your applications:

// Example client code
const response = await fetch('http://localhost:3000/validate', {
  method: 'POST',
  headers: {
    'Content-Type': 'application/json'
  },
  body: JSON.stringify({
    data: yourDataObject
  })
});

const result = await response.json();
console.log(result);

Troubleshooting

If you encounter any issues:

• Ensure the server is running and accessible at the expected port
• Check that your JSON data is properly formatted
• Verify that the ValJS package is correctly installed

How to add this MCP server to Cursor

There are two ways to add an MCP server to Cursor. The most common way is to add the server globally in the ~/.cursor/mcp.json file so that it is available in all of your projects.

If you only need the server in a single project, you can add it to the project instead by creating or adding it to the .cursor/mcp.json file.

Adding an MCP server to Cursor globally

To add a global MCP server go to Cursor Settings > MCP and click "Add new global MCP server".

When you click that button the ~/.cursor/mcp.json file will be opened and you can add your server like this:

{
    "mcpServers": {
        "cursor-rules-mcp": {
            "command": "npx",
            "args": [
                "-y",
                "cursor-rules-mcp"
            ]
        }
    }
}

Adding an MCP server to a project

To add an MCP server to a project you can create a new .cursor/mcp.json file or add it to the existing one. This will look exactly the same as the global MCP server example above.

How to use the MCP server

Once the server is installed, you might need to head back to Settings > MCP and click the refresh button.

The Cursor agent will then be able to see the available tools the added MCP server has available and will call them when it needs to.

You can also explictly ask the agent to use the tool by mentioning the tool name and describing what the function does.