PostgreSQL

The Postgres server connects an agent to a database with a single connection URL passed as an argument — no separate environment variables to configure. Every query runs inside a read-only transaction, which is a deliberate safety constraint: this server is built for an agent to understand a database (inspect schemas, explore tables, answer questions about the data) rather than to run migrations or write production data.

Worth knowing before you install it: this server originated in Anthropic’s main reference-servers repository but has since been moved into the servers-archived companion repo, meaning it’s no longer actively developed by the Model Context Protocol team, even though it remains functional and widely used. We list its verification status as Community rather than Verified for exactly that reason — this catalog tracks maintenance status, not just whether something used to be official.

If you’re running it against a database on the same machine as Docker Desktop on macOS, use host.docker.internal in place of localhost in the connection string, since localhost inside the container won’t resolve to the host.