ClickHouse Database MCP server

The ClickHouse MCP Server provides a Model Context Protocol implementation that allows AI assistants to securely interact with ClickHouse databases. Through this server, AI systems can explore database structures, read data, and run SQL queries via a controlled interface that ensures safe database access.

Configuration

You can configure the server using environment variables:

CLICKHOUSE_HOST=localhost    
CLICKHOUSE_PORT=8123         
CLICKHOUSE_USER=default
CLICKHOUSE_PASSWORD=CHANGE_TO_YOUR_PASSWORD
CLICKHOUSE_DATABASE=default

Alternatively, use command-line arguments:

• --host - the database host
• --port - the database port
• --user - the database username
• --password - the database password
• --database - the database name

Setting Up in Cline

Configure the MCP server in VSCode, Cline extension, or other MCP clients with the following JSON configuration:

{
  "mcpServers": {
    "clickhouse": {
      "command": "uv",
      "args": [
        "--directory",
        "/path/to/clickhouse_mcp_server",
        "run",
        "-m",
        "clickhouse_mcp_server.server"
      ],
      "env": {
        "CLICKHOUSE_HOST": "localhost",
        "CLICKHOUSE_PORT": "8123",
        "CLICKHOUSE_USER": "default",
        "CLICKHOUSE_PASSWORD": "CHANGE_TO_YOUR_PASSWORD",
        "CLICKHOUSE_DATABASE": "default"
      }
    }
  }
}

Using with AI Assistants

Once configured, you can ask natural language questions to AI assistants that will be translated into SQL queries for your ClickHouse database. For example:

What is the sales volume in each region? Which product is the best-selling?

The AI assistant will use the MCP server to:

1. Explore the database structure
2. Formulate appropriate SQL queries
3. Execute them securely via the MCP server
4. Interpret and present the results

Prerequisites

Before using the server, ensure you have:

• Python with the uv package manager installed
• A running ClickHouse database
• All MCP server dependencies installed

How to install this MCP server

For Claude Code

To add this MCP server to Claude Code, run this command in your terminal:

claude mcp add-json "clickhouse" '{"command":"uv","args":["--directory","/path/to/clickhouse_mcp_server","run","-m","clickhouse_mcp_server.server"],"env":{"CLICKHOUSE_HOST":"localhost","CLICKHOUSE_PORT":"8123","CLICKHOUSE_USER":"default","CLICKHOUSE_PASSWORD":"CHANGE_TO_YOUR_PASSWORD","CLICKHOUSE_DATABASE":"default"}}'

See the official Claude Code MCP documentation for more details.

For 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 > Tools & Integrations and click "New MCP Server".

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

{
    "mcpServers": {
        "clickhouse": {
            "command": "uv",
            "args": [
                "--directory",
                "/path/to/clickhouse_mcp_server",
                "run",
                "-m",
                "clickhouse_mcp_server.server"
            ],
            "env": {
                "CLICKHOUSE_HOST": "localhost",
                "CLICKHOUSE_PORT": "8123",
                "CLICKHOUSE_USER": "default",
                "CLICKHOUSE_PASSWORD": "CHANGE_TO_YOUR_PASSWORD",
                "CLICKHOUSE_DATABASE": "default"
            }
        }
    }
}

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 explicitly ask the agent to use the tool by mentioning the tool name and describing what the function does.

For Claude Desktop

To add this MCP server to Claude Desktop:

1. Find your configuration file:

• macOS: ~/Library/Application Support/Claude/claude_desktop_config.json
• Windows: %APPDATA%\Claude\claude_desktop_config.json
• Linux: ~/.config/Claude/claude_desktop_config.json

2. Add this to your configuration file:

{
    "mcpServers": {
        "clickhouse": {
            "command": "uv",
            "args": [
                "--directory",
                "/path/to/clickhouse_mcp_server",
                "run",
                "-m",
                "clickhouse_mcp_server.server"
            ],
            "env": {
                "CLICKHOUSE_HOST": "localhost",
                "CLICKHOUSE_PORT": "8123",
                "CLICKHOUSE_USER": "default",
                "CLICKHOUSE_PASSWORD": "CHANGE_TO_YOUR_PASSWORD",
                "CLICKHOUSE_DATABASE": "default"
            }
        }
    }
}

3. Restart Claude Desktop for the changes to take effect