How to Connect PostgreSQL to Claude Code
Query your PostgreSQL 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 PostgreSQL to Sequel, then add Sequel's MCP server to Claude Code using the config on this page. Claude Code can then query your live PostgreSQL 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 PostgreSQL data.
Ask in plain English — Sequel translates it into a PostgreSQL query, runs it, and Claude Code hands back the answer. No SQL, no dashboards, no CSV exports.
- How many rows are in each table?
- Show me the 10 most recently created users
- What's the average order value by customer segment?
- Which products have never been ordered?
- Show me monthly revenue broken down by plan type
How it works
Three steps to get started
Connect PostgreSQL to Sequel
In your Sequel dashboard, go to Connections and add PostgreSQL. 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 rows are in each table?" — and get a real answer backed by live PostgreSQL data.
Why Claude Code
What Claude Code does with your PostgreSQL data
Database access from the terminal
Claude Code can now query your databases as part of agentic coding sessions. Ask it to check schemas, pull sample data, or verify data assumptions — all without leaving the terminal.
Data-aware code generation
When Claude Code knows your actual schema through Sequel, it generates more accurate SQL, migrations, and ORM models — grounded in what's really in your database, not guesses.
Works in any Claude Code session
Once added via CLI, Sequel tools are available in every Claude Code session — interactive, one-shot, or automated. No per-project setup needed.
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 PostgreSQL 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.
Other AI agents
Connect PostgreSQL MCP to any agent
Claude
Use Claude to query your databases, explore schemas, and build analyses — all from one conversation.
Cursor
Query your databases and explore schemas without leaving your code editor.
ChatGPT
Connect ChatGPT to your databases and get data-backed answers in every conversation.
VS Code
Get database access inside VS Code Copilot without leaving your editor.
Windsurf
Give Windsurf's Cascade AI access to your databases — query data without leaving your editor.
Zed
Connect Zed's AI assistant to your databases for real-time data access while you code.
Gemini
Connect Google Gemini to your databases for grounded, data-backed answers.
Claude Code
Query your databases directly from the Claude Code CLI — without leaving your terminal.
Codex
Give OpenAI Codex CLI real-time database access for data-grounded coding sessions.
OpenClaw
Turn your self-hosted OpenClaw agent into a data analyst that queries every source you've connected.
Hermes
Give Nous Research's Hermes agent read access to every database and marketing tool you've connected.
Grok Bot
Tell your Grok bot to add Sequel and it can query every database and marketing tool you've connected.
Muse
Give Meta's Muse one message and it builds its own connector to every source you've put in Sequel.
dots
Add Sequel once in ChatGPT and your dot can answer data questions on its own, day and night.
Other data sources
Connect other sources to Claude Code
MySQL
Instant insights from your MySQL database. Ask in plain English.
ClickHouse
Real-time analytics on ClickHouse at any scale, in plain English.
BigQuery
Query petabytes of BigQuery data in plain English.
Google Sheets
Query, write, and manage Google Sheets with AI.
Google Analytics 4
Ask your GA4 data anything. No SQL, no dashboards.
Google Search Console
Unlock your SEO data with natural language. No exports, no pivot tables.
MCP Server
Connect any MCP-compatible server and query it with AI in seconds.
Stripe
Ask your Stripe data anything. MRR, churn, refunds — answered in plain English.
Polar
Ask your Polar revenue, subscriptions, and usage data anything — in plain English.
Dodo Payments
Ask questions about payments, subscriptions, refunds and payouts in plain English.
PostHog
Ask your PostHog product data anything — with HogQL under the hood.
Mixpanel
Conversational analytics on your Mixpanel events, funnels, and retention.
Amplitude
Query your Amplitude taxonomy, funnels, and dashboards in plain English.
HubSpot
Your AI analyst for HubSpot contacts, deals, tickets, and pipelines.
Ahrefs
Ask your Ahrefs SEO data anything: backlinks, keywords, and traffic.
Apollo.io
Ask your Apollo.io prospects, contacts, and accounts anything, in plain English.
Cloudflare D1
Ask your Cloudflare D1 database questions in plain English.
Instagram organic analytics — post engagement, reach, and audience insights in plain English.
Frequently asked questions
How do I connect PostgreSQL to Claude Code?
You need two things: (1) connect PostgreSQL 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 PostgreSQL data directly.
What PostgreSQL data can Claude Code access?
Claude Code can access any data available through your PostgreSQL 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 PostgreSQL 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 PostgreSQL and generate an API key. Sign up free at sequel.sh — no credit card required. Then create a connection to PostgreSQL and generate an API key from Settings → API Keys.
Can I connect multiple PostgreSQL accounts?
Yes. Sequel supports multiple connections of the same type. If you have multiple PostgreSQL accounts or properties, add each as a separate connection in Sequel. Claude Code will be able to query all of them.
How do I add Sequel to Claude Code?
Run the `claude mcp add` command shown above in your terminal. Replace `sql_your_api_key` with a key from Settings → API Keys. The server is added at the default `local` scope (current project only).
How do I make Sequel available across every project?
Add the `--scope user` flag: `claude mcp add --scope user --transport http sequel https://api.sequel.sh/mcp --header "Authorization: Bearer sql_your_api_key"`. User-scope servers are available in every Claude Code session on this machine.
Can I verify Sequel is connected?
Run `claude mcp list` to see all configured MCP servers, or `claude mcp get sequel` to inspect the Sequel config specifically.
Does this work in Claude Code's non-interactive mode?
Yes. Sequel tools are available in both interactive (`claude`) and non-interactive (`claude -p 'your prompt'`) modes. They're also available when using Claude Code via the SDK.
How do I connect my PostgreSQL database?
Click 'New Connection', select PostgreSQL, and enter your host, port, database name, username, and password. Sequel will test the connection before saving. Make sure your database allows connections from Sequel's IP range.
Is my database connection secure?
All connections use SSL/TLS by default. Credentials are encrypted at rest and never exposed in query results or logs. Sequel uses a read-only connection by default and will not execute write statements.
Can Sequel modify my data?
No. Sequel is read-only by default and will warn you if a query could modify data. The agent is explicitly instructed never to run INSERT, UPDATE, DELETE, or DDL statements unless you explicitly request and confirm it.
What PostgreSQL versions are supported?
Sequel supports PostgreSQL 12 and above. Older versions may work but are not officially tested.
Connect PostgreSQL to Claude Code today
Sign up free, connect your data sources, and start querying in minutes.