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mcp/harbor
Verified official

CalculatorLib MCP

v1.2.0

com.calculatorlib/calculators

Year-correct, cited payroll and tax numbers for Asia (Vietnam first) plus ~8,000 calculators.

transport:streamable-http tools:5
Website

Target client

run in your project directory 

claude mcp add --transport http calculators https://calculatorlib.com/mcp

setup guides: Claude Code Claude Desktop Cursor VS Code Zed Windsurf Cline Gemini CLI Grok ChatGPT Claude.ai LangChain

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

search_calculators Read-only

search calculators

get_calculator_schema Read-only

get calculator schema

run_calculator Mutating

run calculator

convert_units

convert units

solve_math

solve math

All 5 tools, one page each

Mutating and Read-only are read off each tool's name, not its schema — a hint, not a guarantee. Check the server's own documentation before granting access.