chatgpt.js

It handles the complexity of ChatGPT's web interfacelocating DOM elements, managing input submission, reading responses, and controlling conversation statethrough a simple API that enables browser extension developers, automation scripts, and browser-based tools to interact with ChatGPT programmatically without requiring direct API access or API keys.

The library supports a wide range of operations: programmatically sending messages, reading conversation history, controlling settings, switching models, managing chat sessions, and monitoring response streamingall through the ChatGPT web interface rather than the API.

This browser-interface approach means it works with any ChatGPT plan including free accounts, and can access features like browsing, code interpreter, and DALL-E image generation that are only available through the web interface rather than the standard API.

Browser extension developers building productivity tools on top of ChatGPT use chatgpt.js as the foundational library, avoiding the fragile DOM scraping code they would otherwise need to write and maintain as ChatGPT's interface changes.

The library's maintainers track ChatGPT interface updates and release compatibility patches, providing a more stable foundation than each developer maintaining their own ChatGPT DOM manipulation code independently.

Automation researchers studying LLM behavior through web interaction and developers building ChatGPT integrations for accessibility tools also rely on it as the lowest-friction path to programmatic ChatGPT access.