Catalog›Plugins›Databases›mysqlMmysqlConnect and interact with a MySQL database and data Open site Open in the app JSON README (API)READMELoading documentation…# Gemini CLI Extension - MySQL > [!NOTE] > This extension is currently in beta (pre-v1.0), and may see breaking changes until the first stable release (v1.0). This Gemini CLI extension provides a set of tools to interact with [MySQL](https://dev.mysql.com/doc/) instances. It allows you to manage your databases, execute queries, and explore schemas directly from the [Gemini CLI](https://google-gemini.github.io/gemini-cli/), using natural language prompts. > [!IMPORTANT] > **We Want Your Feedback!** > Please share your thoughts with us by filling out our feedback [form][form]. > Your input is invaluable and helps us improve the project for everyone. [form]: https://docs.google.com/forms/d/e/1FAIpQLSfEGmLR46iipyNTgwTmIDJqzkAwDPXxbocpXpUbHXydiN1RTw/viewform?usp=pp_url&entry.157487=mysql ## Why Use the MySQL Extension? * **Natural Language Management:** Stop wrestling with complex commands. Explore schemas and query data by describing what you want in plain English. * **Seamless Workflow:** As a Google-developed extension, it integrates seamlessly into the Gemini CLI environment. No need to constantly switch contexts for common database tasks. * **Code Generation:** Accelerate development by asking Gemini to generate data classes and other code snippets based on your table schemas. ## Prerequisites Before you begin, ensure you have the following: * One of the supported agent harnesses, installed and authenticated: * [Gemini CLI](https://github.com/google-gemini/gemini-cli) (v0.6.0+) * [Claude Code](https://code.claude.com) * [Codex](https://developers.openai.com/codex) (v0.150.0+) * [Antigravity CLI](https://antigravity.google) * [Node.js](https://nodejs.org/) (the MCP server runs via `npx`). * A running MySQL instance. * A user with database-level permissions to execute queries. ## Getting Started ### Installation All harnesses use the same plugin; the MCP server runs via `npx` (no binary to download). Install with your harness of choice: **Gemini CLI** ```bash gemini extensions install https://github.com/gemini-cli-extensions/mysql ``` **Claude Code** ```bash claude plugin marketplace add gemini-cli-extensions/mysql claude plugin install mysql@mysql ``` **Codex** ```bash codex plugin marketplace add gemini-cli-extensions/mysql codex plugin add mysql@mysql ``` **Antigravity** ```bash agy plugin install https://github.com/gemini-cli-extensions/mysql ``` See [Configuration](#configuration) for how each harness supplies the connection settings. ### Configuration The plugin connects to MySQL using these settings: * `MYSQL_HOST`: (Optional) The MySQL host. Defaults to `localhost`. * `MYSQL_PORT`: (Optional) The MySQL port. Defaults to `3306`. * `MYSQL_DATABASE`: The name of the database to connect to. * `MYSQL_USER`: The database username. * `MYSQL_PASSWORD`: The password for the database user. How you supply them depends on the harness: * **Gemini CLI**: prompted on install and saved to the extension's `.env`. View or update later with `gemini extensions list` / `gemini extensions config mysql [setting] [--scope user|workspace]` (restart the CLI to apply). * **Claude Code**: pass `--config KEY=VALUE` on install (repeatable), or run `/plugin` inside Claude Code. * **Codex** and **Antigravity**: export the variables in your shell before starting: ```bash export MYSQL_HOST="<your-mysql-host>" # Optional, defaults to localhost export MYSQL_PORT="<your-mysql-port>" # Optional, defaults to 3306 export MYSQL_DATABASE="<your-database-name>" export MYSQL_USER="<your-database-user>" export MYSQL_PASSWORD="<your-database-password>" ``` > [!NOTE] > See [Troubleshooting](#troubleshooting) for debugging your configuration. ### Start Gemini CLI To start the Gemini CLI, use the following command: ```bash gemini ``` > [!WARNING] > **Changing Instance & Database Connections** > Currently, the database connection must be configured before starting the Gemini CLI and can not be changed during a session. > To save and resume conversation history use command: `/chat save <tag>` and `/chat resume <tag>`. ## Usage Examples Interact with MySQL using natural language right from your IDE: * **Explore Schemas and Data:** * "Show me all tables in the 'orders' database." * "What are the columns in the 'products' table?" * "How many orders were placed in the last 30 days, and what were the top 5 most purchased items?" * **Generate Code:** * "Generate a Python dataclass to represent the 'customers' table." ## Supported Tools * `list_tables`: Use this tool to list tables and descriptions. * `execute_sql`: Use this tool to execute any SQL statement. * `get_query_plan`: Use this tool to generate an execution plan. * `list_active_queries`: Use this tool to lists top N (default 10) ongoing queries. * `list_tables_missing_unique_indexes`: Use this tool to find tables that do not have primary or unique key constraint * `list_table_fragmentation`: Use this tool to list fragmented tables ## Additional Extensions Find additional extensions to support your entire software development lifecycle at [github.com/gemini-cli-extensions](https://github.com/gemini-cli-extensions), including: * [Cloud SQL for MySQL extension](https://github.com/gemini-cli-extensions/cloud-sql-mysql) * and more! ## Troubleshooting Use `gemini --debug` to enable debugging. Common issues: * "✖ Error during discovery for server: MCP error -32000: Connection closed": The database connection has not been established. Ensure your configuration is set via environment variables. * "✖ MCP ERROR: Error: spawn npx ENOENT": Node.js/`npx` is not installed or not on your `PATH`. Install Node.js (which provides `npx`). * "npm error"/network failures on first run: `npx` fetches `@toolbox-sdk/server` on first launch, so it needs network access. Retry once connectivity is available. DetailsTypePluginsTopicDatabasesPublishergooglecloudplatformSourcegeminiCategoryToolsVersion0.1.6Stars42Copies (forks)3Proposed changes4Last updateNov 9, 20266 days agoProject statusActiveLicenseApache-2.0AddedOct 15, 20261 month agoUpdatedOct 15, 20261 month agoSource idgooglecloudplatform/mysql-pluginMoreMore plugins on DatabasesAll from googlecloudplatformA–Z index
