StarRocks Official MCP Server

The StarRocks MCP Server acts as a bridge between AI assistants and StarRocks databases. It allows for direct SQL execution, database exploration, data visualization via charts, and retrieving detailed schema/data overviews without requiring complex client-side setup.

Features

• Direct SQL Execution: Run SELECT queries (read_query) and DDL/DML commands (write_query).
• Database Exploration: List databases and tables, retrieve table schemas (starrocks:// resources).
• System Information: Access internal StarRocks metrics and states via the proc:// resource path.
• Detailed Overviews: Get comprehensive summaries of tables (table_overview) or entire databases (db_overview), including column definitions, row counts, and sample data.
• Data Visualization: Execute a query and generate a Plotly chart directly from the results (query_and_plotly_chart).
• Intelligent Caching: Table and database overviews are cached in memory to speed up repeated requests. Cache can be bypassed when needed.
• Flexible Configuration: Set connection details and behavior via environment variables.

Configuration

The MCP server is typically run via an MCP host. Configuration is passed to the host, specifying how to launch the StarRocks MCP server process.

Using Streamable HTTP (recommended):

To start the server in Streamable HTTP mode:

First test connect is ok:

$ STARROCKS_URL=root:@localhost:8000 uv run mcp-server-starrocks --test

Start the server:

uv run mcp-server-starrocks --mode streamable-http --port 8000

Then config the MCP like this:

{
  "mcpServers": {
    "mcp-server-starrocks": {
      "url": "http://localhost:8000/mcp"
    }
  }
}

Using uv with installed package (individual environment variables):

{
  "mcpServers": {
    "mcp-server-starrocks": {
      "command": "uv",
      "args": ["run", "--with", "mcp-server-starrocks", "mcp-server-starrocks"],
      "env": {
        "STARROCKS_HOST": "default localhost",
        "STARROCKS_PORT": "default 9030",
        "STARROCKS_USER": "default root",
        "STARROCKS_PASSWORD": "default empty",
        "STARROCKS_DB": "default empty"
      }
    }
  }
}

Using uv with installed package (connection URL):

{
  "mcpServers": {
    "mcp-server-starrocks": {
      "command": "uv",
      "args": ["run", "--with", "mcp-server-starrocks", "mcp-server-starrocks"],
      "env": {
        "STARROCKS_URL": "root:password@localhost:9030/my_database"
      }
    }
  }
}

Using uv with local directory (for development):

{
  "mcpServers": {
    "mcp-server-starrocks": {
      "command": "uv",
      "args": [
        "--directory",
        "path/to/mcp-server-starrocks", // <-- Update this path
        "run",
        "mcp-server-starrocks"
      ],
      "env": {
        "STARROCKS_HOST": "default localhost",
        "STARROCKS_PORT": "default 9030",
        "STARROCKS_USER": "default root",
        "STARROCKS_PASSWORD": "default empty",
        "STARROCKS_DB": "default empty"
      }
    }
  }
}

Using uv with local directory and connection URL:

{
  "mcpServers": {
    "mcp-server-starrocks": {
      "command": "uv",
      "args": [
        "--directory",
        "path/to/mcp-server-starrocks", // <-- Update this path
        "run",
        "mcp-server-starrocks"
      ],
      "env": {
        "STARROCKS_URL": "root:password@localhost:9030/my_database"
      }
    }
  }
}

Command-line Arguments:

The server supports the following command-line arguments:

uv run mcp-server-starrocks --help

• --mode {stdio,sse,http,streamable-http}: Transport mode (default: stdio or MCP_TRANSPORT_MODE env var)
• --host HOST: Server host for HTTP modes (default: localhost)
• --port PORT: Server port for HTTP modes
• --test: Run in test mode to verify functionality

Examples:

# Start in streamable HTTP mode on custom host/port
uv run mcp-server-starrocks --mode streamable-http --host 0.0.0.0 --port 8080

# Start in stdio mode (default)
uv run mcp-server-starrocks --mode stdio

# Run test mode
uv run mcp-server-starrocks --test

• The url field should point to the Streamable HTTP endpoint of your MCP server (adjust host/port as needed).
• With this configuration, clients can interact with the server using standard JSON over HTTP POST requests. No special SDK is required.
• All tool APIs accept and return standard JSON as described above.

Note: The sse (Server-Sent Events) mode is deprecated and no longer maintained. Please use Streamable HTTP mode for all new integrations.

Environment Variables:

Connection Configuration

You can configure StarRocks connection using either individual environment variables or a single connection URL:

Option 1: Individual Environment Variables

• STARROCKS_HOST: (Optional) Hostname or IP address of the StarRocks FE service. Defaults to localhost.
• STARROCKS_PORT: (Optional) MySQL protocol port of the StarRocks FE service. Defaults to 9030.
• STARROCKS_USER: (Optional) StarRocks username. Defaults to root.
• STARROCKS_PASSWORD: (Optional) StarRocks password. Defaults to empty string.
• STARROCKS_PASSWORD_KEYCHAIN_SERVICE: (Optional, macOS only) Generic password service name to use when reading the password from Keychain. This is only used when no explicit password is provided via STARROCKS_PASSWORD or STARROCKS_URL.
• STARROCKS_PASSWORD_KEYCHAIN_ACCOUNT: (Optional, macOS only) Generic password account name to use when reading the password from Keychain. Defaults to the resolved StarRocks user.
• STARROCKS_DB: (Optional) Default database to use if not specified in tool arguments or resource URIs. If set, the connection will attempt to USE this database. Tools like table_overview and db_overview will use this if the database part is omitted in their arguments. Defaults to empty (no default database).

Option 2: Connection URL (takes precedence over individual variables)

• STARROCKS_URL: (Optional) A connection URL string that contains all connection parameters in a single variable. Format: [<schema>://]user:password@host:port/database. The schema part is optional. When this variable is set, it takes precedence over the individual STARROCKS_HOST, STARROCKS_PORT, STARROCKS_USER, STARROCKS_PASSWORD, and STARROCKS_DB variables.

  Examples:

  • root:mypass@localhost:9030/test_db
  • mysql://admin:secret@db.example.com:9030/production
  • starrocks://user:pass@192.168.1.100:9030/analytics

Password precedence:

• A password embedded in STARROCKS_URL wins, including an explicit empty password like user:@host:9030/db.
• If STARROCKS_URL omits the password, STARROCKS_PASSWORD is used when set.
• If neither explicit password source is set and STARROCKS_PASSWORD_KEYCHAIN_SERVICE is configured, the password is read from macOS Keychain.

macOS Keychain example

Store the password:

security add-generic-password -U -a root -s mcp-server-starrocks -w 'secret'

Verify the stored password:

security find-generic-password -a root -s mcp-server-starrocks -w

Use it with this server:

export STARROCKS_URL=root@localhost:9030/test_db
export STARROCKS_PASSWORD_KEYCHAIN_SERVICE=mcp-server-starrocks
export STARROCKS_PASSWORD_KEYCHAIN_ACCOUNT=root

Additional Configuration

• STARROCKS_OVERVIEW_LIMIT: (Optional) An approximate character limit for the total text generated by overview tools (table_overview, db_overview) when fetching data to populate the cache. This helps prevent excessive memory usage for very large schemas or numerous tables. Defaults to 20000.

• STARROCKS_MCP_OUTPUT_DIR: (Optional) Directory used by read_query when its output_file argument is a relative path. Defaults to ~/.mcp-server-starrocks/output/. The directory is created on demand. Absolute paths passed to output_file (including ~-prefixed paths) bypass this setting. Note: files are written on the machine where the MCP server runs. For Claude Code / Claude Desktop the server runs locally, so files land on your laptop. For remote/http deployments the file lands on the server, not the client.

• STARROCKS_MYSQL_AUTH_PLUGIN: (Optional) Specifies the authentication plugin to use when connecting to the StarRocks FE service. For example, set to mysql_clear_password if your StarRocks deployment requires clear text password authentication (such as when using certain LDAP or external authentication setups). Only set this if your environment specifically requires it; otherwise, the default auth_plugin is used.

• MCP_TRANSPORT_MODE: (Optional) Communication mode that specifies how the MCP Server exposes its services. Available options:

  • stdio (default): Communicates through standard input/output, suitable for MCP Host hosting.
  • streamable-http (Streamable HTTP): Starts as a Streamable HTTP Server, supporting RESTful API calls.
  • sse: (Deprecated, not recommended) Starts in Server-Sent Events (SSE) streaming mode, suitable for scenarios requiring streaming responses. Note: SSE mode is no longer maintained, it is recommended to use Streamable HTTP mode uniformly.

Components

Tools

• read_query

  • Description: Execute a SELECT query or other commands that return a ResultSet (e.g., SHOW, DESCRIBE). Optionally write the full result to a local file instead of returning it inline — useful for results too large to fit in the model context.
  • Input: