Connect PostgreSQL to Claude

Connect PostgreSQL to Claude in three steps using Windsor MCP:

1. Log in to Windsor.ai and connect your PostgreSQL database
2. Install the Windsor.ai connector from the Claude directory
3. Authorize access and start asking Claude questions about your connected data

Highly useful for data engineers and data teams who maintain a PostgreSQL database and want to reduce one-off report requests. Also useful for analysts who want to explore data directly in Claude without writing SQL from scratch every time.

Once connected, you can query your database in plain English instead of writing SQL, build a daily or weekly summary from any table, and join multiple tables to ask Claude what’s driving a pattern, without writing the join yourself.

Claude can automatically parse and analyze semi-structured JSONB fields, extracting nested values and summarizing patterns without requiring manual SQL or predefined schemas. This makes it easy to work with event logs, metadata, and other flexible data stored in PostgreSQL.

Yes. Claude can analyze timestamped data to identify trends, compare time periods, and detect anomalies. For example, you can ask how today’s hourly transactions compare to previous weeks and quickly spot unusual drops or spikes.

Data engineers connect PostgreSQL to Claude via Windsor.ai for schema exploration and data quality audits without writing SQL, asking Claude to check null rates, flag broken foreign key relationships, or suggest which tables are worth joining. Claude works directly against your actual tables and columns, custom fields included. It also handles ad-hoc questions from other teams, freeing up time for deeper schema work.

Windsor.ai connects to your database through encrypted tunnels and uses read-only access by default. This means Claude can safely analyze your data and answer questions without the ability to modify or delete your production tables.

You can use this prompt:

'Scan our schema for redundant data or columns that should be normalized into separate tables.'

It acts as a consultant, identifying where your PostgreSQL architecture might be slowing down queries or causing data integrity risks.

Analyzing PostgreSQL data with Claude becomes more powerful when you move beyond basic ‘Select’ statements and start using context-aware prompts. For example:

Schema analysis.

I am working with a PostgreSQL database. Here is the DDL for my orders, users, and products tables. Please summarize the relationships between these tables and identify any potential data integrity risks, such as missing foreign key indexes or nullable columns that might break a join.

Anomaly detection. 

Analyze this dataset of daily revenue for the last 90 days. Identify any outliers that fall outside two standard deviations from the mean. For each anomaly, correlate it with our marketing_campaigns table to see if a specific event caused the spike or dip.

Cohort analysis.

Write a PostgreSQL query to perform a monthly retention cohort analysis. Group users by their signup_month and show the percentage of users who purchased in Month 1, Month 2, and Month 3. Format the output so it can be easily pasted into a spreadsheet.

Predictive LTV modeling.

Analyze the first 30 days of transaction behavior for all users who joined in the last year. Based on their initial purchase value and session frequency, predict the 12-month Lifetime Value (LTV) for our current active cohorts. Compare this against our Ad Spend to determine our 12-month payback confidence.

Windsor.ai’s pricing for Claude data integration varies depending on the number of connected accounts and data sources. We offer absolutely transparent pricing plans for diversified business needs and budgets.

Yes, we have helpful resources to help you get started. You can explore our official documentation and tutorials for seamless PostgreSQL to Claude integration with Windsor.ai:

• PostgreSQL Field Reference
• Claude Integration Video Tutorial