[![MseeP.ai Security Assessment Badge](https://mseep.net/mseep-audited.png)](https://mseep.ai/app/starrocks-mcp-server-starrocks) # 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 `uv` with installed package:** ```json { "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", "STARROCKS_OVERVIEW_LIMIT": "default 20000", "STARROCKS_MYSQL_AUTH_PLUGIN":"mysql_clear_password" } } } } ``` **Using `uv` with local directory (for development):** ```json { "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", "STARROCKS_OVERVIEW_LIMIT": "default 20000", "STARROCKS_MYSQL_AUTH_PLUGIN":"mysql_clear_password" } } } } ``` **Using Streamable HTTP (recommended for integration):** ```json { "mcpServers": { "mcp-server-starrocks": { "url": "http://localhost:8000/mcp" } } } ``` To start the server in Streamable HTTP mode: ```bash export MCP_TRANSPORT_MODE=streamable-http uv run mcp-server-starrocks ``` - 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:** - `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_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). - `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_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`). - **Input:** `{ "query": "SQL query string" }` - **Output:** Text content containing the query results in a CSV-like format, including a header row and a row count summary. Returns an error message on failure. - `write_query` - **Description:** Execute a DDL (`CREATE`, `ALTER`, `DROP`), DML (`INSERT`, `UPDATE`, `DELETE`), or other StarRocks command that does not return a ResultSet. - **Input:** `{ "query": "SQL command string" }` - **Output:** Text content confirming success (e.g., "Query OK, X rows affected") or reporting an error. Changes are committed automatically on success. - `query_and_plotly_chart` - **Description:** Executes a SQL query, loads the results into a Pandas DataFrame, and generates a Plotly chart using a provided Python expression. Designed for visualization in supporting UIs. - **Input:** ```json { "query": "SQL query to fetch data", "plotly_expr": "Python expression string using 'px' (Plotly Express) and 'df' (DataFrame). Example: 'px.scatter(df, x=\"col1\", y=\"col2\")'" } ``` - **Output:** A list containing: 1. `TextContent`: A text representation of the DataFrame and a note that the chart is for UI display. 2. `ImageContent`: The generated Plotly chart encoded as a base64 PNG image (`image/png`). Returns text error message on failure or if the query yields no data. - `table_overview` - **Description:** Get an overview of a specific table: columns (from `DESCRIBE`), total row count, and sample rows (`LIMIT 3`). Uses an in-memory cache unless `refresh` is true. - **Input:** ```json { "table": "Table name, optionally prefixed with database name (e.g., 'db_name.table_name' or 'table_name'). If database is omitted, uses STARROCKS_DB environment variable if set.", "refresh": false // Optional, boolean. Set to true to bypass the cache. Defaults to false. } ``` - **Output:** Text content containing the formatted overview (columns, row count, sample data) or an error message. Cached results include previous errors if applicable. - `db_overview` - **Description:** Get an overview (columns, row count, sample rows) for _all_ tables within a specified database. Uses the table-level cache for each table unless `refresh` is true. - **Input:** ```json { "db": "database_name", // Optional if STARROCKS_DB env var is set. "refresh": false // Optional, boolean. Set to true to bypass the cache for all tables in the DB. Defaults to false. } ``` - **Output:** Text content containing concatenated overviews for all tables found in the database, separated by headers. Returns an error message if the database cannot be accessed or contains no tables. ### Resources #### Direct Resources - `starrocks:///databases` - **Description:** Lists all databases accessible to the configured user. - **Equivalent Query:** `SHOW DATABASES` - **MIME Type:** `text/plain` #### Resource Templates - `starrocks:///{db}/{table}/schema` - **Description:** Gets the schema definition of a specific table. - **Equivalent Query:** `SHOW CREATE TABLE {db}.{table}` - **MIME Type:** `text/plain` - `starrocks:///{db}/tables` - **Description:** Lists all tables within a specific database. - **Equivalent Query:** `SHOW TABLES FROM {db}` - **MIME Type:** `text/plain` - `proc:///{+path}` - **Description:** Accesses StarRocks internal system information, similar to Linux `/proc`. The `path` parameter specifies the desired information node. - **Equivalent Query:** `SHOW PROC '/{path}'` - **MIME Type:** `text/plain` - **Common Paths:** - `/frontends` - Information about FE nodes. - `/backends` - Information about BE nodes (for non-cloud native deployments). - `/compute_nodes` - Information about CN nodes (for cloud native deployments). - `/dbs` - Information about databases. - `/dbs/` - Information about a specific database by ID. - `/dbs//` - Information about a specific table by ID. - `/dbs///partitions` - Partition information for a table. - `/transactions` - Transaction information grouped by database. - `/transactions/` - Transaction information for a specific database ID. - `/transactions//running` - Running transactions for a database ID. - `/transactions//finished` - Finished transactions for a database ID. - `/jobs` - Information about asynchronous jobs (Schema Change, Rollup, etc.). - `/statistic` - Statistics for each database. - `/tasks` - Information about agent tasks. - `/cluster_balance` - Load balance status information. - `/routine_loads` - Information about Routine Load jobs. - `/colocation_group` - Information about Colocation Join groups. - `/catalog` - Information about configured catalogs (e.g., Hive, Iceberg). ### Prompts None defined by this server. ## Caching Behavior - The `table_overview` and `db_overview` tools utilize an in-memory cache to store the generated overview text. - The cache key is a tuple of `(database_name, table_name)`. - When `table_overview` is called, it checks the cache first. If a result exists and the `refresh` parameter is `false` (default), the cached result is returned immediately. Otherwise, it fetches the data from StarRocks, stores it in the cache, and then returns it. - When `db_overview` is called, it lists all tables in the database and then attempts to retrieve the overview for _each table_ using the same caching logic as `table_overview` (checking cache first, fetching if needed and `refresh` is `false` or cache miss). If `refresh` is `true` for `db_overview`, it forces a refresh for _all_ tables in that database. - The `STARROCKS_OVERVIEW_LIMIT` environment variable provides a _soft target_ for the maximum length of the overview string generated _per table_ when populating the cache, helping to manage memory usage. - Cached results, including any error messages encountered during the original fetch, are stored and returned on subsequent cache hits. ## Demo ![MCP Demo Image](mcpserverdemo.jpg)