The short answer
publish_site is Beacon's MCP tool. It takes files and returns a public beacon.host URL. Use Calculator Tools when the app should stay on your calculator.tools account. Add MCP and the assistant calls webappCreate.
Both tools publish static files from an agent. The account, the URL, and the lifetime are different.
What this call does
Beacon documents publish_site on https://beacon.host/mcp, next to get_site and get_docs. The required argument is files. Optional fields include slug, title, and expires_at.
Without an account, Beacon says the site lasts 24 hours and comes with a claim link. With their API key, the site goes into a Beacon account. The documented call size without a key is 4 MB.
That is a real publish tool. It is the closest MCP cousin to this host.
What Calculator Tools does
Calculator Tools publishes onto the signed-in account. The URL is on calculator.tools. The app shows in your dashboard.
Files live in one directory. HTML, CSS, JavaScript, and other static files.
You stay the owner. Public apps on this site can be remixed.
Free accounts can publish 3 apps. Pro ($5.99/month) raises the limit to 25.
How to use MCP for this job
If you already wanted publish_site, the matching request here is: create a hosted calculator and return the URL.
Add https://api.calculator.tools/mcp/ in Cursor, Claude, or ChatGPT. Sign in with Google. Click Approve.
Ask for the app, or call the MCP tool publish_site with files. index.html is required. The server calls webappCreate, then webappfileCreate, and returns the calculator.tools URL. A slug is only a title fallback.
Or start on Create with no MCP client.
Limits
Calculator Tools does not call Beacon's publish_site. It does not issue a beacon.host claim token.
This host does not run Beacon Workers. It does not serve a PDF as the product. A static calculator, tracker, or game fits. A backend does not.
Check the page after it is live.
Next step
Open Create or connect MCP. The first 3 apps are free.
Sources
Ready to publish a public app you own?
Calculator Tools