Self-Host PostgREST on Your Homelab with Proxmox | PostgreSQL + REST API + OpenAPI+ Swagger

Want to turn your PostgreSQL database into a fully documented REST API without writing backend code?
In this step-by-step tutorial, I show you how to connect PostgreSQL → PostgREST → OpenAPI → Swagger UI → API Gateway to build a production-ready API in minutes.

This is the same architecture used by modern platforms like Supabase, but fully self-hosted and customizable.

🚀 What You Will Learn

How PostgREST instantly converts PostgreSQL into a REST API

How to generate OpenAPI documentation automatically

How to explore & test your API using Swagger UI

How to secure and expose your API through an API Gateway

How to structure your Postgres roles, permissions, and schemas

How to test endpoints and CRUD operations

Perfect backend for AI apps, automation tools, microservices, and low-code platforms

🛠️ Technologies Used

PostgreSQL

PostgREST

OpenAPI Specification

Swagger UI

API Gateway (reverse proxy setup)

📌 Why This Matters

With this setup, you can build powerful APIs:

Without Node.js or Python

Without backend frameworks

Directly from your database

With automatic documentation and schema validation

A perfect approach for developers, DevOps engineers, AI builders, and data engineers who want a fast, reliable API layer.

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