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Show HN: A MCP server and client implementing the latest spec

by init0 on 6/10/25, 6:30 AM with 27 comments

• by jamesblonde on 6/10/25, 9:48 AM

  Protocol version in the readme is Full MCP 2025-03-26 specification support

  in the code it is "protocolVersion": "2024-11-05"

  https://github.com/hemanth/paws-on-mcp/blob/main/src/mcp_cli...

• by manojlds on 6/10/25, 9:16 AM

  Almost no client, including Claude Dekstop, implements Sampling.

  I was so excited to see if I can create a server that used sampling and quickly figured out I can't use it anywhere. Funnily Windsurf hangs forever if you use sampling.

• by baalimago on 6/10/25, 9:03 AM

  The fact that this is an achievement is a testament to how bloated the MCP protocol/spec already is.

  Will be interesting to see how many days it'll take before the implementation no longer is the latest

• by welanes on 6/10/25, 12:19 PM

  This guide may be useful for anyone interested in building their own spec-compliant MCP server: https://simplescraper.io/blog/how-to-mcp.

  Albeit, it's a few weeks old so already in need of an update!

• by LeonidBugaev on 6/10/25, 11:17 AM

  It does not implement the Auth :)

  (mcp auth is terrible btw)

• by pcwelder on 6/10/25, 12:15 PM

  Tool annotations are missing. (Are they of any use though?)

• by cranberryturkey on 6/10/25, 11:26 AM

  also checkout @profullstack/mcp-server on npm

• by jhosft on 6/10/25, 10:55 AM

  That README.md is so vibed with all the emojis and self-proofed comments. One day we’re going to look back on code written in June 2025 and laugh. The code works, but man does Claude 4 pump itself up.

• by josephg on 6/10/25, 1:27 PM

  What is MCP? I’ve never heard of it.