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mcp/harbor
Verified official

Calculator MCP

v0.1.9

io.github.slettmayer/calc-mcp-server

Exact arithmetic: one calculator tool over an AST allowlist, with integers exact at any size.

transport:stdio runtime:pypi
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Target client

run in your project directory 

claude mcp add calc-mcp-server -- uvx calc-mcp-server

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

This listing does not declare its tools. Connect the server and your client will discover them on the handshake.