What is looker-mcp-skill?

Guidance for connecting an AI assistant to Looker, a business-intelligence platform for exploring company data and managing data definitions.

It helps query data, inspect semantic models, manage LookML projects, and run system diagnostics through Looker.

It explains how to set up Looker's managed or standalone connection and find the available tools and permissions.

looker-mcp-skill — Skill for Claude Code by looker-open-source

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Any agent

npx skills add looker-open-source/looker-skills --skill looker-mcp-skill

Clone the repo

git clone --depth 1 https://github.com/looker-open-source/looker-skills

Made for: Claude Code.

Or install looker-skills, the plugin that ships this one along with the rest of its 23 skills.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/looker-open-source/looker-skills/looker-mcp-skill/github.svg)](https://agentmods.dev/skills/looker-open-source/looker-skills/looker-mcp-skill)

Your own site

<a href="https://agentmods.dev/skills/looker-open-source/looker-skills/looker-mcp-skill"><img src="https://agentmods.dev/badge/skills/looker-open-source/looker-skills/looker-mcp-skill/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/looker-open-source/looker-skills/looker-mcp-skill"><img src="https://agentmods.dev/badge/skills/looker-open-source/looker-skills/looker-mcp-skill.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 52 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 3,372 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe. Third-party audits

NVIDIA SkillSpector warn 7 Sept 2026

SkillSpector: 3 findings, up to medium

These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →

medium MCP Rug Pull · line 35
npx commands without a version suffix (e.g. @1.0.0) create a rug-pull risk if the upstream server is compromised and publishes a malicious update.

Fix: Pin the version: npx @scope/[email protected]
medium MCP Rug Pull · line 39
Docker image references without a specific tag (:latest is implicit) or digest (@sha256:...) can be silently replaced by a malicious image.

Fix: Pin the image: image:tag or image@sha256:abc123
medium Data Exfiltration · line 76
Data is being sent to an external URL. This could be legitimate telemetry or data exfiltration. Manual review is recommended.

Fix: Verify the destination URL is trusted and necessary. Remove or replace with documented APIs. Ensure no secrets, tokens, or PII are transmitted.

How audits are shown

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00052	$0.03372
Opus 5	$0.00026	$0.01686
Sonnet 5	$0.00010	$0.00674
Haiku 4.5	$0.00005	$0.00337

Measured 12d ago against content hash eb61d073cc85, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-11, from the pricing page.

Security

Grade A, and why

looker-mcp-skill scanned grade A with 1 finding against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

You can register an OAuth client application using either the **API Explorer extension** (recommended) or via `curl`.

skills/looker-mcp-skill/SKILL.md · 282 lines

How it starts

The opening of the file, as written. The whole thing — 282 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Looker MCP Server Skill

This skill documents how to access, configure, and use the Looker Model Context Protocol (MCP) Server. It enables AI assistants, local IDEs (VS Code, Cursor, Claude Desktop, Gemini CLI), and automated agents to interact directly with Looker instances to query data, inspect semantic models, manage LookML projects, and execute system diagnostics.

1. Accessing the Looker MCP Server

Looker supports two primary deployment modes for the MCP server:

A. Looker-Managed MCP Server (Recommended for Cloud / GCP Core)

The Looker-Managed MCP Server is built directly into Looker instances (Looker Core and Looker Original). It is hosted and managed by Google Cloud, eliminating the need to run separate server infrastructure.

Endpoint: https://<YOUR_LOOKER_INSTANCE_URL>/mcp
Enablement:
1. Navigate to Admin Panel > Platform > MCP.
2. Toggle Enable MCP Server to On.
3. Ensure users and client applications have appropriate API and feature permissions.

B. Local / Standalone MCP Server (MCP Toolbox for Databases)

For customer-hosted (on-premise) instances, custom developer environments, or standalone CLI integrations, you can run the MCP server locally using the MCP Toolbox for Databases (@google/mcp-toolbox).

Installation / Launch:

npx @google/mcp-toolbox --prebuilt=looker,looker-dev

Or via Docker:

docker run -p 5000:5000 \
  -e LOOKER_BASE_URL="https://your-instance.looker.com" \
  -e LOOKER_CLIENT_ID="<CLIENT_ID>" \
  -e LOOKER_CLIENT_SECRET="<CLIENT_SECRET>" \
  us-central1-docker.pkg.dev/database-toolbox/toolbox/toolbox:latest --prebuilt=looker,looker-dev --address=0.0.0.0

Environment Variables:
- LOOKER_BASE_URL: Base URL of your Looker instance (e.g., https://mycompany.looker.com).
- LOOKER_CLIENT_ID: Looker API 4.0 Client ID.
- LOOKER_CLIENT_SECRET: Looker API 4.0 Client Secret.
- LOOKER_VERIFY_SSL: Set to false for self-signed development certificates (default: true).

Read the full file on GitHub · 282 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

12d ago First seen · 282 lines · 52 tokens per session scan A eb61d073cc85

Subscribe to this mod's changes

looker-mcp-skill is a skill published in the GitHub repository looker-open-source/looker-skills (28 stars, last pushed 1mo ago), licensed Apache-2.0. It adds 52 tokens to every session and 3,372 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it A with 1 finding (makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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looker-mcp-skill