mcp-calculator mcp

v1.0.0 · MCP Tool · registry.pascalai.org

Evaluate mathematical expressions with precision. Supports arithmetic, algebra, trigonometry, unit conversions, statistics and complex numbers. Never attempt mental arithmetic — use this tool.

Input Parameters

Parameter	Type	Description
expressionrequired	string	Math expression to evaluate: `'2^10'`, `'sin(PI/4)'`, `'mean([1,2,3])'`, `'15 kg in lb'`.
precisionoptional	integer	Decimal places in result. Default: 10, max: 50.
variablesoptional	object	Named variables to substitute into the expression: `{"x": 5, "y": 3}`.

Output Fields

Field	Type	Description
result	string	Result as string, preserving full precision.
numeric	number	Numeric (floating-point) representation of the result.
expression	string	Normalized form of the input expression.
unit	string	Result unit when a unit conversion was performed.
steps	array	Intermediate computation steps for complex expressions.

Example

// Input — compound interest
{ "expression": "1000 * (1 + 0.07)^20", "precision": 2 }

// Output
{ "result": "3869.68", "numeric": 3869.68, "expression": "1000*(1.07)^20" }

// Input — unit conversion
{ "expression": "100 mph in km/h" }

// Output
{ "result": "160.9344", "unit": "km/h" }

Install & Discovery

Install

ppm install mcp-calculator

Get JSON Schema

GET /v1/packages/mcp-calculator/1.0.0/schema

Discover by keyword

GET /v1/mcp/discover?q=calculator

Discovery hint: Use this tool for any numerical computation, unit conversion, or statistical calculation. Never perform mental arithmetic in an agent — delegate to this tool for accuracy and precision.

PascalAI Usage

uses toolslib;

var
  Calc := LoadTool('mcp-calculator');

  // Financial calculation
  var Principal := Calc.Call(JsonObj(['expression', '50000 * (1 + 0.085)^10', 'precision', 2]));
  Writeln('Future value: $' + Principal['result']);

  // Statistics
  var Stats := Calc.Call(JsonObj(['expression', 'stdev([12, 15, 18, 14, 17, 19, 13])']));
  Writeln('Std deviation: ' + Stats['result']);