PostgreSQL MCP Server — Give AI Agents Live SQL Access
Install the PostgreSQL MCP server to let Claude Code, Cursor, and Windsurf query your live database. Read schemas, run SELECTs, inspect query plans, and debug slow queries — all without copy-pasting SQL back and forth with the AI.
Install PostgreSQL MCP Server
{
"mcpServers": {
"postgres": {
"command": "npx",
"args": [
"-y",
"@modelcontextprotocol/server-postgres",
"postgresql://user:password@localhost:5432/dbname"
]
}
}
}PostgreSQL MCP Server — Database Queries for AI
MCP server for PostgreSQL database access. Run read-only SQL queries, inspect schemas, list tables, and analyze data directly from Claude Code or Cursor.
Jina Reader — AI-Friendly Web Content Extraction
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Live database context for AI agents
The PostgreSQL MCP server solves the most frustrating failure mode in AI-assisted development: the model writes perfect-looking SQL against a schema that doesn't exist. With the MCP server installed, Claude Code and Cursor can inspect your real tables, read live column types, check actual indexes, and test queries before suggesting them. No more "hallucinated table names" — the model is grounded in what's actually in your database.
The official reference implementation ships in read-only mode by default, which is exactly what you want for a production connection. The AI can SELECT, run EXPLAIN ANALYZE, and explore pg_catalog — but it can't accidentally DROP TABLE users. For write access, point it at a separate dev database or create a bounded role with explicit grants. Both modes are production-safe when configured correctly.
Where this gets transformative is pairing the PostgreSQL MCP server with a GitHub MCP server. An agent can now: read a failing migration from a PR, check the current schema in staging, detect the conflict, rewrite the migration, and open a follow-up PR — all in one conversation. For broader database tooling including MySQL, MongoDB, and Supabase, browse the TokRepo database directory. For agent frameworks that chain these tools together, see our agent building tools.
The moment your AI stops hallucinating table names is the moment it starts shipping real migrations.
Questions fréquentes
What is the PostgreSQL MCP server?+
The PostgreSQL MCP server is an open-source implementation of the Model Context Protocol that lets AI agents query a Postgres database. It exposes a set of structured tools — list tables, describe schema, run query, explain query — and handles connection pooling and error handling. The reference implementation is read-only by default and ships under @modelcontextprotocol/server-postgres on npm.
How do I install the Postgres MCP server in Claude Code?+
Run `claude mcp add postgres -- npx -y @modelcontextprotocol/server-postgres postgresql://user:pass@host:5432/db` in your terminal, then restart Claude Code. Verify with `claude mcp list`. For production databases, we strongly recommend creating a dedicated read-only Postgres role and putting its credentials in the connection string — never use a superuser account.
Is it safe to connect the MCP server to a production database?+
Yes, if you use a read-only role and enable statement timeouts. Create a Postgres role with only SELECT permissions on the schemas the AI needs, set `statement_timeout` on the role to prevent runaway queries, and consider putting the connection through pgbouncer with a capped pool size. Never give the AI an account with DROP or TRUNCATE privileges on production data.
Can the MCP server write to the database?+
The official reference implementation is read-only. For write access you have two options: (1) Use a fork that supports INSERT/UPDATE with approval workflows, or (2) Run a second instance of the server against a separate dev/staging database where write access is safe. Many teams keep a read-only production connection AND a writable staging connection configured simultaneously.
Does it work with Supabase, Neon, and other hosted Postgres?+
Yes. Anything that speaks the Postgres wire protocol works — Supabase, Neon, Railway, AWS RDS, Azure Database for PostgreSQL, Google Cloud SQL, and self-hosted clusters. Just point the connection string at the host. For Supabase specifically, check the TokRepo database directory — there's a dedicated Supabase MCP server that also exposes auth and storage APIs.
What PostgreSQL versions are supported?+
The reference server uses the node-postgres driver, which supports PostgreSQL 9.4 through 17. For query-plan inspection features (EXPLAIN ANALYZE with JSON output), you need PostgreSQL 9.6+. For the best experience with modern AI workflows, we recommend PostgreSQL 15 or 16 since they expose richer pg_stat views the AI can use for performance diagnosis.