Protocol Version Incompatibility with Claude Desktop

[pezzking]

Issue

The kubernetes-mcp-server version 0.0.36 is incompatible with Claude Desktop v0.9.3's MCP client, while version 0.0.35 works correctly. The issue appears to be related to protocol version handling.

Environment

• Claude Desktop: v0.9.3
• Operating System: macOS
• Architecture: ARM64 (Apple Silicon)
• kubernetes-mcp-server: v0.0.36 (failing) / v0.0.35 (working)

Details

1. Claude client sends initialization with protocol version: "2024-11-05"
2. Server v0.0.36 responds with protocol version: "2025-03-26"
3. Server v0.0.35 responds with protocol version: "2024-11-05"

Reproduction Steps

1. Install kubernetes-mcp-server@0.0.36
2. Configure Claude Desktop v0.9.3 to use the server
3. Start Claude
4. Observe server logs showing protocol mismatch and early disconnection

Logs

2025-05-29T08:29:18.696Z [kubernetes] [info] Message from client: {"method":"initialize","params":{"protocolVersion":"2024-11-05","capabilities":{},"clientInfo":{"name":"claude-ai","version":"0.1.0"}},"jsonrpc":"2.0","id":0}
2025-05-29T08:29:19.814Z [kubernetes] [info] Message from server: {"jsonrpc":"2.0","id":0,"result":{"protocolVersion":"2025-03-26",...}}
2025-05-29T08:29:19.815Z [kubernetes] [info] Server transport closed unexpectedly

Workaround

Using version 0.0.35 of the server, which maintains protocol version compatibility with Claude Desktop's MCP client.

Recommendation

Consider either:

1. Making v0.0.36 backward compatible with protocol version "2024-11-05"
2. Or documenting the protocol version requirements more explicitly
3. Or implementing protocol version negotiation between client and server

[manusa]

Might be related to mark3labs/mcp-go#337

[manusa]

I just released v0.0.37 that contains the fix in mcp-go that should handle this issue.

Can you confirm this works for you?

[manusa]

Closing as no feedback has been provided. I assume the issue is gone now.