Scherlok MCP Server

Zero-config anomaly detection for your database tables. No YAML, no rules, no thresholds. Scherlok learns what "normal" looks like, then tells you when something changes. It runs locally over stdio via the published package.

People who work with anomaly detection, bigquery and data engineering and want it reachable from Claude, Cursor, VS Code, or another MCP client. The project is written in Python.

VERIFIED ACTIVE

LAST COMMIT 2026-09-28 · ★ 11 · #32 OF 125 MAINTAINED DEVOPS & MONITORING · VERIFIED 2026-09-30

MIT · Python servers · how we verify → /methodology

01 · Install Scherlok

before you install - you'll need

Set SCHERLOK_CONNECTION, ANTHROPIC_API_KEY, SCHERLOK_SMTP_HOST, SCHERLOK_SMTP_USER, SCHERLOK_SMTP_PASSWORD, SNOWFLAKE_USER, SNOWFLAKE_PASSWORD, SNOWFLAKE_WAREHOUSE before connecting.

Claude Code

claude mcp add rbmuller-scherlok -- uvx scherlok

Claude Desktop / Cursor / VS Code - add to config

{
  "mcpServers": {
    "rbmuller-scherlok": {
      "command": "uvx",
      "args": [
        "scherlok"
      ]
    }
  }
}

Same JSON for Cursor. For VS Code, rename the top-level key from `mcpServers` to `servers`.

Using another client? Same JSON, different key

Claude Desktop · mcpServers

Cursor · mcpServers

VS Code · servers

Windsurf · mcpServers

Zed · context_servers

Cline · mcpServers

Roo Code · mcpServers

Continue · mcpServers

LibreChat · mcpServers

Gemini CLI · mcpServers

Codex CLI · mcp_servers

Full setup guides: every client.

02 · Evidence

Security posture

What to check before giving this server access to your agent - from the registry, GitHub, and our own probes. We don't score safety; we show what's verifiable.

runs as local process (stdio) - runs on your machine with your user's permissions

license MIT - declared in the repository

pypi package scherlok - check the name against the project README before installing (PyPI has no namespace ownership)

registry namespace io.github.rbmuller is GitHub-verified and matches the repo owner

03 · What Scherlok can do

Prose above is summarized from the project's README and registry record - no invented capabilities.

Latest releases

v1.0.4 · 2026-09-24

[1.0.4] - 2026-09-24 · Fixed · Cardinality noise on unique columns - deleting rows also drops the distinct count of a unique id or timestamp column, so a single volume drop fired a cardinality_change warning per unique…

v1.0.3 · 2026-09-22

[1.0.3] - 2026-09-22 · Added · Claude Desktop extension - mcpb/ builds scherlok-<version>.mcpb, attached to every GitHub release. Opening it installs the MCP server in one click and asks only for the connection string…

v1.0.2 · 2026-09-18

[1.0.2] - 2026-09-18 · Fixed · MCP server reported an empty version - serverInfo.version was blank in every initialize reply because the package version was never passed to the server class, so clients and registries…

04 · Who maintains Scherlok

Scherlok is maintained by rbmuller. It's the only MCP server we track from this author; the repo dates to Apr 2026.

05 · Facts

repository: github.com/rbmuller/scherlok
category: DevOps & monitoring - ranked #32 of 125 actively-maintained DevOps & monitoring servers as of 2026-09-30.
release cadence: 7 releases in the last 90 days (latest 2026-09-24)
registry: io.github.rbmuller/scherlok (active, first published 2026-05-28 · 5 versions)
packages: pypi:scherlok

06 · Scherlok FAQ

What is Scherlok?

Is Scherlok still maintained?

Yes - as of 2026-09-30, its last commit was 2026-09-28 and it shipped 7 releases in the last 90 days. We re-verify nightly.

How do I install Scherlok?

Run `uvx scherlok`. The README documents 8 environment variables (SCHERLOK_CONNECTION, ANTHROPIC_API_KEY, SCHERLOK_SMTP_HOST…) to set first. Set SCHERLOK_CONNECTION, ANTHROPIC_API_KEY, SCHERLOK_SMTP_HOST, SCHERLOK_SMTP_USER, SCHERLOK_SMTP_PASSWORD, SNOWFLAKE_USER, SNOWFLAKE_PASSWORD, SNOWFLAKE_WAREHOUSE before connecting. You can also paste the ready-made client config above.

Does Scherlok run locally?

Yes - it's a stdio server: it runs on your machine (via uvx) with your user's permissions. Your data stays local unless the server itself calls external APIs.

07 · Alternatives to Scherlok

Alternatives to Scherlok

Maintained DevOps & monitoring servers if Scherlok isn't the fit.

Pairs well with

Servers that cover what Scherlok doesn't - only shown when the pairing reason fits the companion.

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