MySQL

A Model Context Protocol (MCP) implementation that enables secure interaction with MySQL databases. This server component facilitates communication between AI applications (hosts/clients) and MySQL databases, making database exploration and analysis safer and more structured through a controlled interface. **Note**: MySQL MCP Server supports both standard input/output (STDIO) and Streamable HTTP (SSE) transport modes. The SSE mode is recommended for remote/self-hosted deployments. - **Hosted**—[Fronteir AIruns the server for you; no local setup required. - **Local**—](https://fronteir.ai/mcp/designcomputer-mysql-mcp-server)[Smitheryinstalls and runs the server on your own machine. - List available MySQL tables as resources - Read table contents - Execute SQL queries with proper error handling - **Multi-database mode**(Optional`MYSQL_DATABASE`) - **SSE/HTTP transport support**(`MCP_TRANSPORT=sse`) - **SSH Tunneling support** - **Comprehensive schema information** - **Table data sampling** - Secure database access through environment variables - Comprehensive logging To install MySQL MCP Server for Claude Desktop automatically via](https://smithery.ai/server/designcomputer/mysql-mcp-server)[Smithery: ``` `npx -y @smithery/cli install designcomputer/mysql-mcp-server --client claude` ``` ``` `claude mcp add --transport stdio designcomputer-mysql_mcp_server uvx mysql_mcp_server` ``` ``` `autohand mcp add mysql env MYSQL_HOST=localhost MYSQL_PORT=3306 MYSQL_USER=your_username MYSQL_PASSWORD=your_password MYSQL_DATABASE=your_database uvx mysql_mcp_server` ``` Add`--scope project`after`mcp add`to keep the registration in the current workspace. See](https://smithery.ai/server/designcomputer/mysql-mcp-server)[Autohand Codefor current CLI details. Set the following environment variables: ``` `MYSQL_HOST=localhost # Database host MYSQL_PORT=3306 # Optional: Database port (defaults to 3306 if not specified) MYSQL_USER=your_username MYSQL_PASSWORD=your_password MYSQL_DATABASE=your_database # Optional: Omit for multi-database mode # Advanced Configuration MYSQL_SSL_MODE=DISABLED # DISABLED, REQUIRED, VERIFY_CA, VERIFY_IDENTITY MYSQL_CONNECT_TIMEOUT=10 # Timeout in seconds # Connection behaviour (Optional) MYSQL_SQL_MODE=TRADITIONAL # SQL mode applied to the connection (default: TRADITIONAL) # Compatibility (Optional) MYSQL_CHARSET=utf8mb4 MYSQL_COLLATION=utf8mb4_unicode_ci MYSQL_AUTH_PLUGIN= # e.g., mysql_native_password for older MySQL versions MYSQL_USE_PURE=false # Force the pure-Python connector (default: false) MYSQL_RAISE_ON_WARNINGS=false # Raise on SQL warnings (default: false) # SSE Transport (Optional) MCP_TRANSPORT=stdio # stdio or sse MCP_SSE_HOST=0.0.0.0 # Listen on all interfaces (required for Docker/hosting) PORT=8000 # HTTP port (fallback for MCP_SSE_PORT) MCP_SSE_ALLOWED_HOSTS= # Comma-separated allowed Host headers (default: localhost:{port},127.0.0.1:{port}) # SSH Tunneling (Optional) MYSQL_SSH_ENABLE=false # Set to true to enable MYSQL_SSH_HOST= # SSH jump host MYSQL_SSH_PORT=22 # SSH port MYSQL_SSH_USER= # SSH username MYSQL_SSH_KEY_PATH= # Path to SSH private key MYSQL_SSH_REMOTE_HOST=localhost # Host from the perspective of the jump host MYSQL_SSH_REMOTE_PORT=3306 MYSQL_LOCAL_PORT=3330` ``` On startup the server automatically loads a`.env`file via`python-dotenv`, so for local use you can simply: ``` `cp .env.example .env # then edit with your credentials` ``` The file is read from the**process working directory**(and parent directories), which works when you run the server yourself from the project folder. ⚠️**Claude Code / Claude Desktop:**these hosts launch the server from their own working directory, so the project's`.env`will**not**be found and you'll see`Missing required database configuration`. Put your`MYSQL_*`values in the`env`block of the MCP config (shown in the Usage section below) rather than relying on`.env`. When`MYSQL_DATABASE`is not set, the server operates in multi-database mode: - `list_resources`returns all user databases (system databases are filtered out) - Use fully qualified table names like`mydb.mytable`in SQL queries - **Note:**Only single SQL statements are supported. Multi-statement queries (e.g.,`USE db; SELECT ...`) are not supported. - **Arguments:**`query`(string) - **Features:**Supports`SELECT`,`SHOW`,`DESCRIBE`, and DML (`INSERT`,`UPDATE`,`DELETE`). DML operations are marked with a destructive hint. - **Limitation:**Single statements only. Multi-statement queries are not supported. - **Cross-database:**Use`database.table`notation to query any database regardless of the`MYSQL_DATABASE`setting. Provides detailed metadata about database structures. - **Arguments:**`table_name`(optional string) - **Output:**Column names, types, nullability, default values, and comments. - **Cross-database:**Pass`database.table`to query a table outside`MYSQL_DATABASE`; bare names use the configured database. - **Identifier rules:**Names must contain only alphanumeric characters, underscores, and`$`(dots are allowed as a separator between database and table names). Fetches a representative sample of data. - **Arguments:**`table_name`(string),`limit`(optional integer, max 20) - **Use Case:**Quickly understand data formats and content without fetching large result sets. - **Cross-database:**Pass`database.table`to sample a table outside`MYSQL_DATABASE`; bare names use the configured database. - **Identifier rules:**Names must contain only alphanumeric characters, underscores, and`$`(dots are allowed as a separator between database and table names). In addition to tools, the server exposes**MCP prompts**— guided, multi-step workflows that a client can launch on demand. In Claude Code they appear as slash commands (`/mcp__<server>__<prompt>`); in Claude Desktop they appear in the prompts (`+`) menu. ``` `/mcp__mysql__explore_database /mcp__mysql__analyze_table customers` ``` Both prompts orchestrate the existing`get_schema_info`and`get_table_sample`tools;`explore_database`also uses resource listing to enumerate tables. Add this to your`claude_desktop_config.json`: ``` `{ "mcpServers": { "mysql": { "command": "uv", "args": ](https://github.com/autohandai/code-cli/)[ "--directory", "path/to/mysql_mcp_server", "run", "mysql_mcp_server" ], "env": { "MYSQL_HOST": "localhost", "MYSQL_PORT": "3306", "MYSQL_USER": "your_username", "MYSQL_PASSWORD": "your_password", "MYSQL_DATABASE": "your_database" } } } }` ``` For more detailed examples and agent-specific guidance, see[MCP_USECASES.md. ``` `{ "mcpServers": { "mysql": { "type": "stdio", "command": "uvx", "args": ](https://github.com/designcomputer/mysql_mcp_server/blob/HEAD/MCP_USECASES.md)[ "--from", "mysql-mcp-server", "mysql_mcp_server" ], "env": { "MYSQL_HOST": "localhost", "MYSQL_PORT": "3306", "MYSQL_USER": "your_username", "MYSQL_PASSWORD": "your_password", "MYSQL_DATABASE": "your_database" } } } }` ``` Note: Will need to install uv for this to work While MySQL MCP Server isn't intended to be run standalone or directly from the command line with Python, you can use the MCP Inspector to debug it. The MCP Inspector provides a convenient way to test and debug your MCP implementation: ``` `# Install dependencies pip install -r requirements.txt # Use the MCP Inspector for debugging (do not run directly with Python)` ``` The MySQL MCP Server is designed to be integrated with AI applications like Claude Desktop and should not be run directly as a standalone Python program. ``` `# Clone the repository git clone https://github.com/designcomputer/mysql_mcp_server.git cd mysql_mcp_server # Create virtual environment python -m venv venv source venv/bin/activate # or `venv\Scripts\activate` on Windows # Install development dependencies pip install -r requirements-dev.txt # Copy the example config and edit with your credentials cp .env.example .env # Edit .env with your MySQL connection details # Run tests pytest` ``` - **Identifier Validation:**Table and database names passed to`get_schema_info`and`get_table_sample`are validated against a strict whitelist (alphanumeric, underscore, and`$`only; a single dot is allowed as a`database.table`separator). Other special characters are rejected to prevent SQL injection. **Encrypted Access:**Full support for SSL/TLS and SSH Tunneling for secure remote connections. **Log Privacy:**Passwords and SSH private keys are automatically masked in server logs. **Least Privilege:**Always use a dedicated MySQL user with minimal required permissions. **SSE transport has no built-in authentication.**The SSE server binds to`0.0.0.0`by default and accepts connections without credentials. If you expose it beyond localhost, place it behind a reverse proxy (nginx, Caddy, Traefik) that enforces authentication. Example with nginx and HTTP Basic Auth: ``` `location /sse { auth_basic "MCP"; auth_basic_user_file /etc/nginx/.htpasswd; proxy_pass http://127.0.0.1:8000; proxy_set_header Host $host; proxy_buffering off; } location /messages/ { auth_basic "MCP"; auth_basic_user_file /etc/nginx/.htpasswd; proxy_pass http://127.0.0.1:8000; proxy_set_header Host $host; }` ``` Set`MCP_SSE_HOST=127.0.0.1`so the server only listens on loopback and the proxy is the sole public entry point. Set`MCP_SSE_ALLOWED_HOSTS`to the public hostname your proxy forwards (e.g.`MCP_SSE_ALLOWED_HOSTS=myserver.example.com:443`). See[SECURITY.mdfor a comprehensive guide on securing your deployment. This MCP implementation requires database access to function. For security: - **Create a dedicated MySQL user**with minimal permissions - **Never use root credentials**or administrative accounts - **Restrict database access**to only necessary operations - **Enable logging**for audit purposes - **Regular security reviews**of database access See](https://github.com/designcomputer/mysql_mcp_server/blob/HEAD/SECURITY.md)[MySQL Security Configuration Guidefor detailed instructions on: - Creating a restricted MySQL user - Setting appropriate permissions - Monitoring database access - Security best practices ⚠️ IMPORTANT: Always follow the principle of least privilege when configuring database access. MIT License - see LICENSE file for details. - Fork the repository - Create your feature branch (`git checkout -b feature/amazing-feature`) - Commit your changes (`git commit -m 'Add some amazing feature'`) - Push to the branch (`git push origin feature/amazing-feature`) - Open a Pull Request Read and write access to Airtable databases. 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