Claude Desktop
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Anthropic's official Claude AI desktop application. Supports MCP servers to extend functionality.
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MCP Clickhouse
ClickHouse/mcp-clickhouse
The server implements MCP 2026-07-28 and supports legacy initialize handshakes from 2024-11-05 through 2025-11-25. Modern clients use sessionless requests and server/discover. Existing clients can continue to negotiate the legacy protocol.
Install
Environment variables
CLICKHOUSE_HOSTCLICKHOUSE_PORTCLICKHOUSE_USERCLICKHOUSE_PASSWORDCLICKHOUSE_ROLECLICKHOUSE_SECURECLICKHOUSE_VERIFYCLICKHOUSE_CONNECT_TIMEOUTCHDB_ENABLEDCLICKHOUSE_ENABLEDCHDB_DATA_PATHMCP_MIDDLEWARE_MODULE- GitHub stars
- 225
- Author
- @ClickHouse
- Category
- Database, Developer Tools
- Updated
- Oct 6, 2026
About MCP Clickhouse
[!NOTE] HTTP requests without MCP-Protocol-Version are routed through legacy handling so clients from before 2025-06-18 can continue to connect. MCP 2026-07-28 permits this behavior on servers that support those clients. Modern clients should send the header on every POST request.
Features
Use null with a Nullable(...) type.
Pass exact integers outside JavaScript's safe range as decimal strings, for example "18446744073709551615" with {id:UInt64}. Dates, timestamps, and exact decimals can also be passed as strings with…
Bind vectors as one array, for example {vector:Array(Float32)} with "params": {"vector": [0.25, 0.5, 0.75]}.
Nulls inside arrays depend on the installed driver. They work with clickhouse-connect 1.8.0 but fail with the supported minimum 1.0.0.
JSON lists and objects cannot bind to ClickHouse Tuple and Map types.
Tools (4)
run_query
list_databases
list_tables
run_chdb_select_query
Details on this page are taken from the project's README. Open README
Supported clients
Clients mentioned in this server's README:
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