mcpbus

AI on your data, with guardrails.

Local MCP server for SQL Server and PostgreSQL.
Free, and runs on your computer.

Download for Windows ↓v1.0.10 or irm mcpbus.sh/install.ps1 | iex
 
How it works

mcpbus sits between your AI assistant and your databases. Every query runs through mcpbus, with only the rights you grant, and your passwords stay with mcpbus.

Schema-only by defaultRaise access to read or read & write when you need it.
Access per database and time windowOpen up one database, for two hours or until Friday.
Approval before writesEach write waits for your approval in the chat.
Hashed string valuesOn by default. Same value, same token.
Schema-only by defaultRaise access to read or read & write when you need it.
Access per database and time windowOpen up one database, for two hours or until Friday.
Approval before writesEach write waits for your approval in the chat.
Hashed string valuesOn by default. Same value, same token.
tested with
SQL Server 2016+ · Azure SQL · PostgreSQL 16+ Claude Code · Claude Desktop · VS Code