PostgreSQL MCP + PostgREST API

Two ways to interact with PostgreSQL directly in the Composable Stack:

• PostgreSQL MCP (postgresql-mcp) — 27 database administration and query tools via MCP
• PostgREST API — REST CRUD endpoints auto-generated from PostgreSQL schema, used from n8n/Trigger.dev/curl

PostgreSQL MCP Tools

MCP server ID: postgresql-mcp (Supabase Toolbox v0.31.0) Tool prefix: mcp__postgresql-mcp__

Query & SQL

Execute SQL

Run any single SQL statement — SELECT, INSERT, UPDATE, DELETE, CREATE, ALTER, DROP.