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Calculate

An MCP tool from the Calculators server, hosted on mcp.hjlabs.in.

Evaluate an arithmetic expression exactly: + - * / % ^ (power), ! (factorial), parentheses, constants pi, e, tau, phi, and functions sqrt, cbrt, abs, round(x, places), floor, ceil, sin, cos, tan, asin, acos, atan, atan2, log (base 10), log2, ln, exp, min, max, pow, mod, sum, avg, hypot, deg, rad, fact. Use this instead of doing arithmetic in your head.

Name on the gateway: math__calculate · read-only.

Parameters

NameTypeDescription
expression requiredstringThe expression, e.g. "sqrt(2) * (3 + 4)^2 / 7" or "round(12.3456, 2)".
precisionintegerDecimal places in the result. Default: up to 12 significant.

How to call it

Through the Smart Gateway, any client can run it by name with call_tool, or let the gateway find it with search_tools:

call_tool arguments
{
  "name": "math__calculate",
  "arguments": {
    "expression": "…"
  }
}

Or connect the Calculators server directly, which lists 28 tools including this one:

Run in your terminal
claude mcp add --transport http hj-math https://mcp.hjlabs.in/mcp/math \
  --header "Authorization: Bearer YOUR_API_KEY"

Try asking

Use the calculate tool with expression set to ….

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