MCP Server for Databend
Connect AI agents to your Databend database safely. Session sandbox keeps production read-only while agents experiment. Works with Codex, Cursor, Claude Code, Gemini CLI, and any MCP-compatible client. Learn more at databend.com/mcp.
Usage
- Get your Databend DSN.
Format:
databend://user:password@host:port/database?warehouse=your_warehouseGet it from Databend Cloud or the docs. - Session sandbox safety: writes only to
mcp_sandbox_{session_id}_*; production stays read-only. Useget_session_sandbox_prefixto retrieve the live prefix. - Configure your MCP client.
Standard config works in most tools:
{
"mcpServers": {
"databend": {
"command": "uv",
"args": ["tool", "run", "--from", "mcp-databend@latest", "mcp-databend"],
"env": {
"DATABEND_DSN": "databend://user:password@host:port/database?warehouse=your_warehouse"
}
}
}
}
Codex
Use the Codex CLI to add the Databend MCP server:
codex mcp add databend \
--env DATABEND_DSN='databend://user:password@host:port/database?warehouse=your_warehouse' \
-- uv tool run --from mcp-databend@latest mcp-databend
Claude Code
Use the Claude Code CLI to add the Databend MCP server:
claude mcp add databend \
--env DATABEND_DSN='databend://user:password@host:port/database?warehouse=your_warehouse' \
-- uv tool run --from mcp-databend@latest mcp-databend
Cursor
Click the button to install:
Then open Cursor Settings -> MCP, select Databend, click Edit, and add DATABEND_DSN to the env section. Cursor keeps the command as a single string:
{
"mcpServers": {
"Databend": {
"command": "uv tool run --from mcp-databend@latest mcp-databend",
"env": {
"DATABEND_DSN": "databend://user:password@host:port/database?warehouse=your_warehouse"
},
"args": []
}
}
}
Or install manually:
Go to Cursor Settings -> MCP -> Add new MCP Server. Paste command uv tool run --from mcp-databend@latest mcp-databend, then click Edit and add DATABEND_DSN in env.
Gemini CLI
Add the standard config above to your Gemini CLI settings.json.
Safety Guarantees
| Scope | Rules |
|---|---|
| Read access | SELECT/SHOW/DESCRIBE/EXPLAIN/LIST on any object. |
| Write access | Only objects prefixed with mcp_sandbox_{session_id}_*. |
| Sandbox objects | CATALOG, DATABASE, TABLE, VIEW, STAGE, FUNCTION, USER, ROLE, TASK, PIPE, STREAM, CONNECTION, WAREHOUSE, SEQUENCE, PROCEDURE, DICTIONARY, TAG, FILE FORMAT, NETWORK POLICY, PASSWORD POLICY, MASKING POLICY, ROW ACCESS POLICY, NOTIFICATION INTEGRATION, WORKLOAD GROUP, DYNAMIC TABLE, INDEX (AGGREGATING/INVERTED/NGRAM/VECTOR). |
| Write rules | CREATE/CREATE OR REPLACE/DROP/ALTER on sandbox objects; DML only on sandbox tables (INSERT/UPDATE/DELETE/TRUNCATE/COPY/MERGE/REPLACE); GRANT/REVOKE only on sandbox objects/principals; `ALTER ... SET |
Available Tools
| Tool | Description |
|---|---|
execute_sql |
Execute SQL with sandbox validation |
execute_multi_sql |
Execute multiple SQL statements |
show_databases |
List all databases |
show_tables |
List tables in database |
describe_table |
Get table schema |
get_session_sandbox_prefix |
Get current session prefix |
list_session_sandbox_databases |
List sandbox databases |
create_session_sandbox_database |
Create sandbox database |
show_stages / list_stage_files / create_stage |
Stage management |
show_connections |
List connections |
Configuration
| Variable | Default | Description |
|---|---|---|
DATABEND_DSN |
- | Connection string |
LOCAL_MODE |
false |
Use embedded Databend |
DATABEND_QUERY_TIMEOUT |
300 |
Query timeout (seconds) |
DATABEND_MCP_SAFE_MODE |
true |
Enable sandbox validation. Set to false to allow all SQL permitted by the Databend user. |
DATABEND_MCP_SERVER_TRANSPORT |
stdio |
Transport: stdio, http, sse |
DATABEND_MCP_BIND_HOST |
127.0.0.1 |
Bind host for HTTP/SSE |
DATABEND_MCP_BIND_PORT |
8001 |
Bind port for HTTP/SSE |
Local mode stores data in .databend/.
Development
git clone https://github.com/databendlabs/mcp-databend
cd mcp-databend
uv sync
# Run locally
uv run python -m mcp_databend.main
# Debug
npx @modelcontextprotocol/inspector uv run python -m mcp_databend.main
# Test
uv run pytest
1 maintainer
Metadata
1 maintainer
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