Can ChatGPT access my Hostfully data?
Yes, on your terms and read-only. You create a Hostfully API key, run a small MCP server (or expose the Platform API as a custom GPT Action), and ChatGPT only sees the data your tools choose to expose, such as properties, leads, and orders. It cannot change anything unless you deliberately add write tools.
ChatGPT added Model Context Protocol support in September 2025 and connects to remote MCP servers over HTTP, so the path is to host the Hostfully MCP server (or wire the Platform API into a custom GPT). You decide which endpoints the server wraps, which is what keeps access scoped: if the server only exposes read tools, that's all ChatGPT can ever do.
Your API key and agency UID live in the server's environment, not in the chat, and a read-only server never sends a write request to Hostfully. If you ever want to cut access, rotate or delete the key under Agency Settings and the connection goes dark instantly.
The full guide shows how to build the read-only server and exactly which tools it exposes.
Read the Hostfully guide