Comment by vidarh

The thing is, MCP is little more than another self-descriping API format, and current models can handle most semi-regular API's with just a description and basic tooling. I had Claude interact with my app server via Curl before I decided to just tell it to write an API client instead. I could have told it to implement MCP instead, but now I have a CLI client that I can use as well, and Claude happily uses it with just the --help options.

If you don't already have an API, sure, MCP is a possible choice for that API. But if you have an API, there is decreasing reasons to bother implementing an MPC server the smarter the models are getting vs. just giving it access to your API docs.