So we made emcee.
emcee takes a remote (OpenAPI documented) API, generates an MCP server, and exposes the API methods to your agent (or other MCP client) as tools.
The easiest way to try it out is with the Claude desktop app (directions on GitHub).
We think emcee is actually pretty helpful in a startup/SaaS context as an interface to your internal admin APIs. It also provides an easy way to connect realtime data to Claude.
Let us know what you think!