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mcp/harbor
LangChain

Postgres MCP for LangChain

io.github.edelciomolina/postgres-mcp

PostgreSQL MCP wrapper with .env credential mapping, tool selection, and safe read-only defaults.

client:LangChain transport:stdio runtime:npm

Install Postgres MCP in LangChain

pip install langchain-mcp-adapters 

from langchain_mcp_adapters.client import MultiServerMCPClient

client = MultiServerMCPClient({
        "postgres-mcp": {
            "transport": "stdio",
            "command": "npx",
            "args": ["-y", "@edelciomolina/postgres-mcp"],
        }
})

tools = await client.get_tools()

get_tools() returns the server's tools as LangChain tools, ready for an agent. LangChain docs

Postgres MCP in other clients

Postgres MCP MCP server