Setup
1. Add your Postgres connection in SaturnSQL (host, port, database, credentials, or a connection string, over SSL or an SSH tunnel).
2. Click your name in the sidebar, then Install MCP, and pick your client: Claude, ChatGPT, Cursor or Claude Code. You add https://mcp.saturnsql.com/mcp and sign in with your SaturnSQL account, with no API key to copy and no local Postgres MCP server to run or maintain.
Your AI client can now ask for your table list, inspect columns and foreign keys, and run SQL against the database, with the same row limits SaturnSQL uses everywhere else, and read-only when the connection is in read-only mode (the default for new connections).
Other PostgreSQL MCP servers
There are good Postgres MCP servers, and which one fits depends on where your database lives. The original reference server is archived, so do not start there.
| Server | Runs as | Works with | Read-only |
|---|---|---|---|
| Postgres MCP Pro | Local process (Docker or Python) | Any Postgres | Restricted mode: read-only transactions plus a time limit |
| Supabase MCP | Hosted, OAuth | Supabase projects only | read_only=true runs queries as a read-only user |
| Neon MCP | Hosted, OAuth or API key | Neon projects only (Neon advises against production use) | readonly=true limits it to read queries |
| AWS Labs Postgres MCP | Local process, AWS credentials | Aurora and RDS for PostgreSQL | Read-only unless started with --allow_write_query |
| Reference server (server-postgres) | Archived in May 2025 | Any Postgres | Its read-only transaction could be escaped with a multi-statement query |
| SaturnSQL | Hosted, OAuth | PostgreSQL and every other engine SaturnSQL connects to | Read-only mode (on for new connections): one SELECT, WITH or EXPLAIN statement per call |
Checked against each project's docs on 8 October 2026.
Supabase and Neon are the natural pick if your database lives there and nowhere else. SaturnSQL fits when you have Postgres on RDS, a VPS or behind a bastion, more than one engine, or a team that should share the queries the AI writes. It works with Supabase and Neon databases too. For every engine side by side, see the best MCP servers for databases.
Common questions
Does it work with Postgres on RDS, Supabase, or self-hosted? Yes, anywhere SaturnSQL can reach over TCP, with SSL or an SSH tunnel where required.
Can I limit my AI client to specific tables? Use a Postgres role with grants on only the schemas you want exposed, then connect with that role. See setting up a read-only database user.
What plan do I need? The MCP server is included on SaturnSQL Starter and above. The free plan can try the editor with one connection, but it cannot connect an AI client.
Does the AI client see my database password? No. The connection and its credentials stay encrypted in SaturnSQL. Your AI client signs in with your SaturnSQL account and only receives query results.
Can it change or delete data? Not unless you allow it. New connections start in read-only mode, where every query must be a single SELECT, WITH or EXPLAIN statement. Keep read-only mode on for the connections your AI client uses, and connect with a read-only database user as well.
Rolling this out to a team? Database governance for MCP and AI covers choosing, per connection, what AI clients may query.
Other databases
Not on Postgres? Claude, ChatGPT, Cursor, and Claude Code all connect to MySQL, Oracle, BigQuery, SQL Server, ClickHouse, and Redshift the same way, or see the full MCP server overview for the rest. Using Claude Dashboards? It has no built-in Postgres connection, but it can query Postgres through SaturnSQL: see Claude Dashboards on your database.
Get answers from your Postgres data in Claude, Cursor, or ChatGPT
