What's Changed

• SNI override support via CLICKHOUSE_SNI environment variable for connections behind proxies or load balancers. (#127)
• Lazy-load chdb to avoid ~80-100 MB memory overhead when the feature is disabled. (#144)
• Made chdb an optional dependency for Windows compatibility. (#145)
• Optional write access mode via CLICKHOUSE_WRITE_ACCESS environment variable, with built-in DROP and TRUNCATE protection. (#93)
• Client config override support through MCP Context session states, enabling dynamic connection switching at runtime. (#115)
• Custom middleware injection via CLICKHOUSE_MCP_MIDDLEWARE environment variable for hooking into the MCP server lifecycle. Includes an example middleware module. (#114)

Full Changelog: v0.2.0...v0.3.0

What's Changed

• Add authentication support for HTTP and SSE transports by @joe-clickhouse in #113

Full Changelog: v0.1.13...v0.2.0

What's Changed

• Syncing GitHub releases with PyPI releases going forward
• See PyPI release history for previous versions

Features in v0.1.13

• Execute SQL queries against ClickHouse clusters with readonly protection
• List databases and tables with pagination, filtering, and detailed metadata
• chDB Support: Query files, URLs, and databases directly using embedded ClickHouse engine (no ETL required)
• Works with ClickHouse Cloud, self-hosted instances, and local development

Full Changelog: https://github.com/ClickHouse/mcp-clickhouse/commits/v0.1.13