# Sign in with ChatGPT: The Developer Guide to Plan Usage

> Source: <https://byteiota.com/sign-in-with-chatgpt-the-developer-guide-to-plan-usage/>
> Published: 2026-10-04 08:13:07+00:00

Sign in with ChatGPT lets Plus and Pro users fund your app's AI with their subscription. Here is the OAuth flow, plan usage restrictions, error codes, and what to build now.

The post 
Sign in with ChatGPT: The Developer Guide to Plan Usage
 appeared first on 
byteiota
.