OpenPost: Building a Free, Open-Source Postman Alternative with Local AI in Mind

This is a submission for the Hacktoberfest Open-Source AI Challenge Week 2: Side Hustle

What I Built

OpenPost — A Free, Open-Source API Client

OpenPost is a free, open-source desktop API client designed as an alternative to Postman. It aims to make API testing accessible without mandatory accounts or paid feature restrictions.

Built with React, TypeScript, Tauri 2, and Rust, OpenPost focuses on providing developers with a desktop API testing experience and a local-first approach to data storage.

My next goal is to explore local AI integration to help developers understand API errors, generate test cases, and improve their workflows without depending on paid AI APIs.

Who is it for?

Independent developers, students, and small development teams looking for an accessible API testing tool.

Demo

Explore the project on GitHub:

https://github.com/azlanabdulla/OpenPost

Code

The source code is available on GitHub:

https://github.com/azlanabdulla/OpenPost

Contributions, bug reports, and feature suggestions are welcome.

How I Built It

OpenPost uses:

• React and TypeScript for the frontend.
• Tauri 2 for the desktop application framework.
• Rust for native functionality and HTTP request execution.

I'm exploring how an open-weight AI model running locally could extend OpenPost with AI-assisted API testing, including error explanations and test-case generation.

Why Does Open Innovation Matter?

Open innovation gives developers the freedom to inspect, modify, and improve the tools they use.

My goal with OpenPost is to make API testing more accessible by keeping the core application free and open-source. Local AI integration is a potential next step toward reducing reliance on paid AI APIs, giving developers more control over their data, and allowing them to choose models that suit their needs.

My Agent Session

OpenPost is being developed as an open-source project. No agent session is included in this submission.

Prize Categories

This project is an exploration of open-source developer tooling, with local AI integration as a planned direction.