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Roslyn CodeLens MCP server

by MarcelRoozekrans·io.github.MarcelRoozekrans/roslyn-codelens·v2.18.1

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

A92/100grade A
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Safety scan
A92/100

full report

Adoption
Growing

51 stars111 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Roslyn CodeLens tools

No tool declarations could be read from the package source. They show once the server is installed.

Public scan report

scanner v0.1.5 · 2026-09-19 · same rubric, same numbers if you re-run it

no findings
  • Code scan2 source files scanned25/25
  • Live reliabilityno gateway calls yet and no remote to proben/a
  • Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 0 days ago15/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 92/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

Install directly

Runs npx -y roslyn-codelens-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add roslyn-codelens -- npx -y roslyn-codelens-mcp
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Roslyn CodeLens: common questions

Is Roslyn CodeLens MCP server safe?
Yes, by our scan: it is graded A (92/100). Read the Roslyn CodeLens safety report
How do I install Roslyn CodeLens?
It runs on your machine. Copy the Claude Code, Claude Desktop or Cursor config from the install section.
Does Roslyn CodeLens need an API key?
Not as far as the registry entry and our scan can tell: no credentials are declared or required.
Is Roslyn CodeLens maintained?
The last commit was in the last day (2026-09-19). The latest release is v2.18.1.
What can I use instead of Roslyn CodeLens?
Servers from other publishers that do the same job: MATLAB MCP Server.

Alternatives to Roslyn CodeLens

Same job from other publishers: the closest match first, then the best rated.

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