PostgreSQL MCP Server
Enables querying PostgreSQL database metadata including table lists and schema information through the MCP protocol. Supports stdio transport for Cursor/IDE integration as well as HTTP transport with health check endpoints.
README
Postgres MCP server
An FastMCP-based MCP server for PostgreSQL metadata (table lists, etc.). Default transport is stdio (for Cursor/IDE); with HTTP transport, GET /health is available.
Requirements: Python 3.14+, uv, and a running PostgreSQL instance.
List of available tools
- get_all_tables - list all tables in the DB;
- get_table_columns - list all columns in the specified table;
- get_table_primary_key - list table primary key;
- get_table_foreign_keys - list table foreign key.
Install
git clone <url> mccp && cd mccp
uv sync
Database configuration
Init file
By default, env/local.ini is read (path is relative to the repo root, not the current working directory). Copy the example and set your values:
db_host=localhost
db_port=5432
db_name=your_db
db_user=postgres
db_password=secret
Env variables
The same settings can be passed via environment variables DB_HOST, DB_PORT, DB_NAME, DB_USER, DB_PASSWORD
CLI flags
Or use CLI flags --db_host, --db_port, etc. (see python src/main.py --help).
Run the server
uv run python src/main.py -t stdio
Other FastMCP transports: -t http, -t sse, and so on. Logs go to a file (default logs/mccp.log); override with --log_file.
For quick DB checks without MCP, use uv run python src/r.py — it uses the same config and calls the tools directly.
Tests
uv run python -m unittest src.tests.process_stdio -v
These integration tests spawn src/main.py as a stdio subprocess; you need a reachable database configured in env/local.ini.
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