I think the original SDK is quite low level, not assembly low level, but if you want to get started and expose a tool to an LLM you would have to write something in the neighborhood of ~200 lines of code, and they would have to be wrapped in a double nested async loop. If you want to develop authorization with Dynamic Client Registration, it going to be another ~1000 lines. I think many developers will want to avoid that. Plus, if the spec changes, and it does very often, you would have to keep track of it, we take care of that for you.

As somebody who has done both- mcp-use makes it very very simple.

If you are at all familiar w/ python back-end development, it's literally just as easy use this tool to make an API as it is to put your MCP into claude desktop.

MCP SDK is not hard to do per se... but it's more than a 5 minute job