x509 mcp for Claude Code

io.github.mrfentmen/x509-mcp

Decode PEM certificates, check expiry and inspect a live TLS certificate, all offline

client:Claude Code transport:stdio runtime:npm

Install x509 mcp in Claude Code

run in your project directory

claude mcp add x509-mcp -- npx -y @mrfentmen/x509-mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs