Mcp server should suppport to receive JSON directly

[bettercallsaulj]

Two ways to consider:

1. When mcp server is running on a terminal. Like listening to port 3000.
   We can paste JSON string on the terminal directly, then server will receive it and response.

2. Using curl:

curl -v http://localhost:3000/rpc -d '{"jsonrpc":"2.0","id":1,"method":"test"}'