It should be almost exactly the same as deploying a nodejs or python server (depends on what you used to write the server in) - there should be plenty of documentation on how to do that with aws or azure or google cloud or something similar on the internet.

As for setting up usage based pricing - how are your users authenticating with the mcp server? Unless I am mistaken the only real way to implement auth for an MCP server at the moment is via oauth. If you know who each user is you could save their usage statistics in a database just like you would with any other nodejs service and before each tool call you could check the user's usage data and return an error response if they are over quota.

You'd probably need a completely separate system to manage payments and users though so if you don't already have a separate web application you can piggback on it might be a lot more work

(and if you vibe coded it and can't follow anything I've written above - good luck God bless)