What this means
A custom GPT is a ChatGPT assistant with extra instructions and tools. Calculator Tools publishes official GPTs that can create a hosted app through the same API as the website.
The GPT conversation stays in ChatGPT. The published app stays on your Calculator Tools account.
Why it matters
People who already work in ChatGPT do not have to open Cursor. They can still get a public URL instead of a chat-only preview.
MCP is the newer connection for Cursor, Claude, and ChatGPT. Custom GPTs remain a supported path.
How it works here
Open the ChatGPT page for the official GPT links. Sign in when the GPT asks. The GPT writes HTML, CSS, and JavaScript. Calculator Tools hosts the result.
A custom GPT that does not call Calculator Tools does not publish a calculator.tools URL.
Related pages
- MCP - the protocol path
- Calculator Tools vs ChatGPT custom GPTs - when the GPT is enough
- Calculator Tools vs ChatGPT Canvas - in-chat editor versus hosted app
- Ownership - the account that receives the app
Sources
Ready to publish a public app you own?
Calculator Tools