ChatGPT Tool Hub is an open-source tool engine that gives ChatGPT “hands and feet”: it lets the language model call external tools through natural language, so a conversation can trigger real actions instead of only producing text. The project is published on GitHub under the MIT license, has collected about 1,300 stars, and was last updated in 2024.
Built during the first wave of ChatGPT enthusiasm, Tool Hub is an execution engine that sits between the model and a library of tools. You describe what you want in plain language, the engine asks the model which tool to invoke and with what arguments, runs the tool, and feeds the result back into the conversation. Tools can be combined in a single request, which turns ChatGPT into a small agent that can chain several capabilities together. The project also ships an “LLM-OS” demo showing the same idea applied to operating everyday software tasks through chat.
The project appeared in early 2023, and its design anticipated the plugin and function-calling ecosystems that followed: tools are described in a structured form, the model selects among them based on the conversation, and tool results flow back into the chat. Documentation includes an English README, a changelog and a Q&A file, and the package saw frequent releases during its most active development period.
ChatGPT Tool Hub is completely free and open source under the MIT license. There is no paid tier or hosted edition; you install the package and use it with your own OpenAI API access.
ChatGPT Tool Hub is for developers and early agent builders who want to experiment with tool use and function calling for ChatGPT-style models, prototype small automations, or study how an LLM tool engine works under the hood.