Dev.to
6/26/2026

The original title is "Building a Zero-Leak Postgres MCP Gateway in Go"
Original: Building a Zero-Leak Postgres MCP Gateway in Go
Short summary
This article explains how to build a zero-leak database proxy in Go using the Model Context Protocol to safely grant LLM agents database access without exposing schema or data. It demonstrates dynamic schema reflection from Postgres and pre-defined aggregations to prevent raw data egress. The pattern uses deny-by-default table whitelisting and pre-approved queries to protect intellectual property while enabling agent analysis.
- •MCP-based database gateway architecture isolates LLM agents from raw schema exposure
- •Dynamic schema reflection and pre-approved aggregations prevent data egress risk
- •Deny-by-default allowlist pattern protects competitive advantage in regulated sectors
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