io.github.MarcelRoozekrans/roslyn-codelens

Roslyn CodeLens

Is the Roslyn CodeLens MCP server down? Yes. It has given no valid answer since 2026-10-20: crashed on start.

Roslyn MCP server: semantic .NET/C# intelligence - analysis, refactoring, tests, IL inspection.

crashed on start down since 2026-10-20 · probed 2026-11-14 · unchanged since 2026-10-27

MCP error -32000: Connection closed
roslyn-codelens-mcp: the .NET SDK was not found on PATH. RoslynCodeLens requires the .NET 10 SDK — https://dotnet.microsoft.

Run it: npx -y roslyn-codelens-mcp@2.18.2 (stdio, probed in a container with the network off)
Host: npmjs.com
Repository: https://github.com/MarcelRoozekrans/roslyn-codelens-mcp
Registry: active, updated 2026-10-13 · registry entry

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Stops answering, comes back, tool set or cost changes. One confirmation mail first, a stop link in every mail.

For the publisher

No valid answer since 2026-10-20, in every probe since then.
The process exited on start before it answered initialize. The error output is above.