Hello,
I am using SQLcl MCP server together with LangGraph for agent orchestration and langchain-mcp-adapters (version 0.2.2) as the MCP client.
When trying to connect, I get the following warning:
WARNING: Client requested unsupported protocol version: 2025-11-25, so the server will suggest the 2024-11-05 version instead
Environment:
- Oracle SQLcl Version 26.1.0
- LangGraph
- langchain-mcp-adapters 0.2.2
The issue is that the MCP client uses a newer protocol version (2025-11-25), while SQLcl MCP server appears to only support 2024-11-05.
At the same time, LangGraph / adapters do not provide a way to downgrade or explicitly set the protocol version.
Questions:
- Are there plans to upgrade SQLcl MCP server to support newer MCP protocol versions?
- Is there any way to configure or force protocol version negotiation on the SQLcl side?
- Are there recommended compatible MCP client versions for SQLcl MCP?
At the moment, the only workaround seems to be downgrading the MCP client library, which is not ideal.
Thanks!