Isthmus

Name: Isthmus
Author: guillermoBallester

@guillermoBallester

关于 Isthmus

A single binary MCP server that gives Claude, Cursor, and any MCP client safe, read-only access to your PostgreSQL database. Runs locally over stdio or HTTP — your credentials never leave your machine.

#postgresdb #masking #mcpserver

基本信息

分类

数据库

传输方式

stdio

发布者

guillermoBallester

提交者

Guillermo Sasso

配置

使用下面的配置,将此服务器添加到你的 MCP 客户端。

{
  "mcpServers": {
    "isthmus": {
      "command": "isthmus",
      "env": {
        "DATABASE_URL": "postgres://user:pass@localhost:5432/mydb"
      }
    }
  }
}

工具

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工具是从 README 中自动提取的。维护者可以在 ## Tools 标题下列出工具,即可填充这部分内容。

概览

What is Isthmus?

Isthmus is a local MCP server that gives AI models safe, read-only access to your PostgreSQL database. It runs as a single binary on your machine; credentials never leave.

How to use Isthmus?

Install Isthmus via the install script or Docker, set the DATABASE_URL environment variable, and add it to your MCP client configuration (e.g., Claude Desktop JSON). Then ask your AI questions about your database.

Key features of Isthmus

Schema discovery and table description tools
Read-only queries with server-side row limits and timeouts
Column masking for PII (redact, hash, partial, null)
Policy engine that enriches schema with business context
SQL validation via AST-level whitelist (only SELECT/EXPLAIN allowed)
HTTP transport for web-based clients and remote access
OpenTelemetry support for distributed tracing and metrics
Works with Claude Desktop, Cursor, Windsurf, VS Code, and ChatGPT Desktop

Use cases of Isthmus

Allow an AI assistant to explore and query your PostgreSQL schema without write access
Enable safe database analysis in client applications by enforcing read-only queries
Protect sensitive PII data by masking columns before results reach the AI
Give AI models business context on schema objects so they generate more accurate SQL