io.github.cyanheads/calculator-mcp-server

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Méthode : MCP Hub analyse la description de chaque outil (couche 1) et, pour le verdict fort, exécute le serveur dans une micro-VM isolée avec leurres et réseau bloqué (couche 2). On publie des noms et des compteurs, jamais le contenu brut renvoyé par un outil.

Les 1 outils

• calculate≈ 2530 tokens

  Evaluate math expressions, simplify algebraic expressions, or compute symbolic derivatives. One expression per call. Supports arithmetic, trigonometry, statistics, matrices, complex numbers, units, and combinatorics.

  Paramètres, retour & exemple (6)

  Paramètres

  • scope · object · optionnel
    Variable assignments for evaluate; simplify and derivative ignore them. Example: { "x": 5, "y": 3 } makes "x + y" evaluate to 8.
  • variable · ? · optionnel
    Variable to differentiate with respect to. Required when operation is "derivative". Empty string is treated as omitted. Example: "x".
  • operation · string · optionnel · evaluate | simplify | derivative
    Operation to perform. "evaluate" computes a numeric result (default). "simplify" reduces an algebraic expression symbolically (e.g., "2x + 3x" -> "5 * x"). Supports algebraic and trigonometric identities. When the simplifier cannot reduce the expression further (e.g. rational expressions requiring polynomial factoring), the result is returned unchanged and unchanged: true is set in the output. "derivative" computes the symbolic derivative (requires the variable parameter).
  • precision · ? · optionnel
    Significant digits (1–16) for numeric results. Omit for full precision. Empty string is treated as omitted. Fraction results always print exactly, and symbolic operations (simplify, derivative) ignore it.
  • expression · string · requis
    One mathematical expression per call — neither `;` nor newlines separate statements. Inside matrices, `;` separates rows (e.g. `[1, 2; 3, 4]`). Supports arithmetic (+, -, *, /, ^, %), functions across arithmetic/trig (sin, cos, sqrt, log, abs, round), statistics (mean, median, std, variance — std and variance return the sample (n − 1) form by default; pass "uncorrected" for the population form, e.g. `std([2, 4, 6], "uncorrected")`), combinatorics (factorial, permutations, combinations), and matrix (det, inv, transpose), plus constants (pi, e, phi, i), units (5 kg to lbs), and variables (when scope is provided). Standard notation `ln` and `arc*` (e.g. `arcsin`, `arctan`) is accepted alongside the math.js names `log` and `asin`/`atan`; common synonyms such as `stdev`, `permute`, `nCr`, and `length`/`len` resolve to their math.js names (`std`, `permutations`, `combinations`, `count`).
  • numericType · string · optionnel · number | BigNumber | Fraction
    Numeric type for evaluate. "number" (default): 64-bit IEEE 754 float — fastest, about 16 significant digits; a value past about 1.8e308 (171!, 2^1024, exp(1000)) overflows and fails with undefined_result. "BigNumber": decimal with 64 significant digits and a much wider exponent range, slower than "number" — retry an overflow with it; results are 64-digit approximations (10000!/9999! returns 9999.99…96, which precision: 16 rounds to 10000). Division by zero, 0/0, and log(0) are undefined in every numeric type, so another numeric type does not fix them. "Fraction": exact rational arithmetic (0.1 + 0.2 returns 3/10); fails with fraction_unsupported when the result has no exact rational value (sqrt(2), sin(1), log(3)), the expression calls a function Fraction mode cannot compute (sqrt(4), 5!, combinations(5, 2)), or it uses a value Fraction mode holds only as a rounded float (pi, e, 2^(1/2), a complex number with a non-integer part, number(x), random()) — use "number" or "BigNumber" for those. A unit conversion with an irrational factor (30 deg to rad) returns a close rational approximation, not an exact value. Ignored for symbolic operations (simplify, derivative).

  Exemple d'appel

  {"name": "calculate", "arguments": {"expression": "texte"}}

  Exemple de retour

  {"content": [{"type": "text", "text": "…"}], "structuredContent": {"error": {}, "result": "texte", "operation": "evaluate", "scopeVars": [], "unchanged": true, "expression": "texte", "resultType": "texte", "precisionUsed": 1}}

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Source

https://calculator.caseyjhand.com/mcp