Build Your Own SQLite MCP Server

This n8n workflow enables you to build a fully functional SQLite MCP (Model Context Protocol) server tailored for self-hosted n8n instances. It supports essential database operations like select, insert, and update queries, allowing compatible MCP clients to manage SQLite databases securely and efficiently. By leveraging an official MCP reference implementation, it provides a robust foundation for local data handling without relying on external services.

The workflow architecture features an MCP Server Trigger connected to five specialized tools: two Code Nodes for read-only queries using the SQLite3 library, and three Custom Workflow tools for more controlled select, insert, and update operations. These custom tools enforce parameter-based inputs to construct safe SQL statements, routing requests via a shared 'Execute Workflow' trigger with a switch node to the appropriate Code Node handlers. Responses are seamlessly returned to the MCP client, ensuring smooth integration.

Key benefits include enhanced security through restricted schemas, simplified local BI capabilities, and time-saving automation for database tasks. Ideal use cases span development environments needing quick DB prototyping, AI agent integrations for data querying, personal knowledge bases, or small-scale analytics without cloud dependencies. It saves hours of custom coding by providing ready-to-use tools for MCP-compatible LLMs like Claude.

To deploy, prepare a SQLite database file, import the workflow into your self-hosted n8n, configure paths and credentials, then connect your MCP client per n8n docs. Test with sample queries to verify read/write functionality.