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Clickhouse MCP Tools for AI Agents

Let an agent discover databases and tables, inspect table schemas, and run read-only ClickHouse queries.

Available Tools

10 tools available in this integration

Clickhouse.DiscoverDatabases

Discover all the databases in the ClickHouse database.

Clickhouse.DiscoverSchemas

Discover all the schemas in the ClickHouse database.

Clickhouse.DiscoverTables

Discover all the tables in the ClickHouse database when the list of tables is not known.

Clickhouse.ExecuteSelectQuery

You have a connection to a ClickHouse database.

Clickhouse.GetTableSchema

Get the schema/structure of a ClickHouse table in the ClickHouse database

Clickhouse.ListColumns

Get the schema/structure of a ClickHouse table in the ClickHouse database

Clickhouse.ListDatabases

Discover all the databases in the ClickHouse database.

Clickhouse.ListSchemas

Discover all the schemas in the ClickHouse database.

Clickhouse.ListTables

Discover all the tables in the ClickHouse database when the list of tables is not known.

Clickhouse.QueryRows

You have a connection to a ClickHouse database.

Why agent-optimized tools matter

Built for intent, not API schemas

Ask the agent to "find the tables that contain customer activity and show me their columns." Arcade picks the right ClickHouse tools without guessing database, schema, or table names.

Up to 100x fewer tokens

ClickHouse discovery and query results return focused database, schema, table, column, and row data, so the agent can inspect structure and answer questions without loading an entire database into the model.

Complete the workflow end to end

Discover databases, inspect schemas, find tables, read column definitions, run a SELECT, and return the rows through one toolkit designed around the complete database exploration task.

Make actions predictable and controlled

Arcade tools return structured results and useful errors across users and runs. Teams can apply scope restrictions, redaction, and approval policies so agents follow the same controls every time.

Securing Clickhouse

The more capabilities agents get, the more useful they are. However, more capabilities bring more risks of undesired effects such as data loss and exfiltration.

This is why Arcade provides you with contextual rules that dictate how and when a tool is allowed to run. Arcade’s contextual access lets you govern tool visibility and behavior at every stage of execution and control who can see a tool, what inputs are allowed, and what comes back.

Learn about Contextual Access Policies

For Clickhouse, you can implement some of these policies:

Access when tools are listed for a user
  • Decide which tools an agent is allowed to see at all. A tool that is never listed cannot be called, whoever is asking.
Pre-execution before each tool call
  • Inspect the inputs a call is about to run with, and block it or send it for human approval when they fall outside what the agent should do unsupervised.
Post-execution after the tool returns
  • Redact email addresses, phone numbers, access tokens, and other customer identifiers from Clickhouse.ExecuteSelectQuery results before they reach the model.
  • Strip column comments and default expressions from Clickhouse.GetTableSchema results when they contain credentials, connection strings, or internal implementation details.
  • Deny Clickhouse.DiscoverTables results that expose table names matching your secrets, payroll, legal-hold, or customer-data patterns, so the agent cannot use metadata to locate restricted datasets.

How to use Clickhouse with your agent

Choose your MCP client below and follow the setup to connect Clickhouse, configure its shared API key, and let your agent discover and query the database.

Your questions, answered

A ClickHouse MCP server exposes ClickHouse database discovery, schema inspection, table exploration, and read-only query capabilities as structured tools an AI agent can call through the Model Context Protocol. An agent can inspect the database and run SELECT queries without receiving the database credential.

Arcade provides the MCP access layer for ClickHouse and adds authenticated tool execution, encrypted credential brokering, approval policies, redaction, and controls for which agents can call which actions. Calls run through a shared API key or secret configured once, rather than requiring each agent to implement ClickHouse authentication.

Arcade agents can discover databases, schemas, and tables; inspect table structures and columns; and execute read-only SELECT queries or return query rows. This integration does not expose ClickHouse write, update, delete, or administrative actions.

The configured ClickHouse API key or secret must have permission to discover the databases, schemas, and tables the agent needs to inspect and to run the SELECT queries in its workflow. The exact permissions depend on the ClickHouse account and deployment configuration.

No. This integration uses one shared API key or secret configured once, rather than a separate ClickHouse account connection for each user. Arcade brokers the credential to make calls, and the model does not receive it.

Yes. Contextual Access policies can require human approval before a ClickHouse call proceeds. Because this integration exposes only read-only discovery and query actions, approval is most useful for controlling access to sensitive databases, schemas, tables, or queries.

Arcade proxies ClickHouse API calls and does not persist your database content as part of normal tool execution. The shared API key or secret is brokered and stored encrypted at rest, and the model never receives the credential.

Any framework or client that can connect to Arcade's MCP gateway or tool APIs works, including LangChain, OpenAI Agents, CrewAI, Claude Desktop, Claude Code, Cursor, Visual Studio Code, Microsoft Copilot Studio, and GitHub Copilot.

Arcade refreshes access while the configured credential remains valid. If the API key or secret is revoked, rotated, expired, or can no longer be used, calls stop until the credential is reconnected or reconfigured.

Calls are subject to limits enforced by your ClickHouse deployment and Arcade. No separate ClickHouse-specific rate limit or quota is defined for this integration, so query size, execution time, concurrency, and account limits remain deployment-dependent.

Ready to actually ship your agent?

Connect your agent to Clickhouse with a shared API key, agent-optimized tools and approval controls for consequential actions.

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