How to Connect ClickHouse to Claude Code
Query your ClickHouse data directly from Claude Code using Sequel’s MCP server. Ask questions in plain English, with no SQL, no dashboards, and no context switching.
Short answer
Connect ClickHouse to Sequel, then add Sequel's MCP server to Claude Code using the config on this page. Claude Code can then query your live ClickHouse data in plain English, with no connector code and no CSV exports. Both steps take a few minutes.
Everything you can ask Claude Code about your ClickHouse data.
Ask in plain English — Sequel translates it into a ClickHouse query, runs it, and Claude Code hands back the answer. No SQL, no dashboards, no CSV exports.
Connect to your agent- How many events did we receive per hour yesterday?
- What's the funnel conversion rate from signup to first purchase?
- Show me the top 10 users by event count this week
- Which event types have increased most in the last 7 days?
- What's the day-1 retention rate for users who signed up last month?
How it works
Three steps to get started
Connect ClickHouse to Sequel
In your Sequel dashboard, go to Connections and add ClickHouse. Sequel handles authentication and schema discovery automatically.
Add Sequel to the agent
Copy the Sequel MCP configuration into Claude Code's settings file (shown below). Swap in your API key from Settings → API Keys.
Ask Claude Code about your data
Restart Claude Code and start asking questions. "How many events did we receive per hour yesterday?" — and get a real answer backed by live ClickHouse data.
Configuration
Add Sequel to Claude Code
Place this in claude mcp add (CLI) and replace sql_your_api_key with a key from Settings → API Keys.
claude mcp add (CLI)
claude mcp add --transport http sequel https://api.sequel.sh/mcp \
--header "Authorization: Bearer sql_your_api_key"Install
Install ClickHouse MCP in Claude Code
Pick your app and Sequel installs itself: a one-click link where the client supports it, that client’s own few steps where it doesn’t. Every route signs in with your Sequel account over OAuth, so there is no API key to copy and nothing to keep in sync.
Already have an MCP client?
https://api.sequel.sh/mcp
Add it as a remote (streamable HTTP) server and sign in when prompted. Skills come with it; nothing else to install. Manual setup per client
Add Sequel to Claude Code
Terminal
claude mcp add --transport http sequel https://api.sequel.sh/mcp
- 1Run the command in your terminal. It adds Sequel to the current project; add --scope user for every project.
- 2Start Claude Code and run /mcp. Choose sequel and sign in in the browser.
- 3Ask a question. Claude Code asks your permission the first time it calls a tool.
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Frequently asked questions
How do I connect ClickHouse to Claude Code?
You need two things: (1) connect ClickHouse to Sequel in your Sequel dashboard under Connections, and (2) add the Sequel MCP config to Claude Code using the setup shown above. Once both are done, Claude Code can query your ClickHouse data directly.
What ClickHouse data can Claude Code access?
Claude Code can access any data available through your ClickHouse connection in Sequel. Use Sequel's search tool to discover available metrics and dimensions, then execute queries to pull the data you need.
Is my ClickHouse data sent to Claude Code's servers?
Query results are returned to Claude Code as context within your conversation. Only the data you explicitly ask about is retrieved. Sequel never stores your query results permanently — they exist only for the duration of the tool call.
Do I need a Sequel account?
Yes. You need a Sequel account to connect ClickHouse and generate an API key. Sign up free at sequel.sh — no credit card required. Then create a connection to ClickHouse and generate an API key from Settings → API Keys.
Can I connect multiple ClickHouse accounts?
Yes. Sequel supports multiple connections of the same type. If you have multiple ClickHouse accounts or properties, add each as a separate connection in Sequel. Claude Code will be able to query all of them.
Connect ClickHouse to Claude Code today
Sign up free, connect your data sources, and start querying in minutes.