DataNexa is a free, local read-only database service designed for AI agents, providing a controlled and auditable data access point. It supports SQLite, MySQL, and PostgreSQL, ensuring that queries are executed under strict read-only policies. The application is built using Tauri, React, and Rust, offering a robust interface for managing database connections while enforcing security measures like Bearer Token authentication and connection limits.

Key features include unified management of read-only connections, SQL syntax tree validation, and local audit logging. Users can discover table structures, sample data, and utilize various MCP tools. The application supports multiple languages and themes, making it user-friendly. Installation is straightforward, with precompiled binaries available for various operating systems, and it also allows for local development and building from source.