This is interesting, but instead of tying it to a specific JS library and all I’d prefer putting a list of options and their arguments into the .well-known tree.

https://en.wikipedia.org/wiki/Well-known_URI

That way any user agent can get the data and make a call directly to the right endpoint with the right data. It could be an AI agent, a web browser, a specialized tool, a cURL command, or whatever.

https://agenticresourcediscovery.org/how_to_publish/ and the caldav stuff might serve as decent examples of where to start.