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fittings Arithmetic Expression Evaluator
x402
fittings Arithmetic Expression Evaluator is a paid API for AI agents from fittings.sh, paid per call via x402, $0.004199/call, status unknown (last checked 2026-09-15).
Evaluates an arithmetic expression in exact rational arithmetic and returns the result as a fraction and a decimal to the requested precision.
Price / call$0.004199
Success—
StatusUnknown
How this service works
Evaluates an arithmetic expression in exact rational arithmetic and returns the fraction plus a decimal to the requested precision.
Output
Returns the evaluated result as an exact rational fraction (numerator/denominator) and as a decimal string rounded to the requested number of decimal places (0–200, default 20). Both representations are provided so callers can verify exact arithmetic and read human-friendly decimals.
Example use cases
Exact fraction arithmetic for finance
“What is 1/3 + 1/6 + 1/9 expressed as an exact fraction and as a decimal to 30 decimal places?”
Verifying a geometric computation
“Evaluate (3^2 + 4^2)^(1/2) for me — give me both the exact rational form and 20 decimal places of precision.”
Checking a compound arithmetic identity
“Is (1 + 1/2 + 1/3 + 1/4 + 1/5) exactly 137/60? Compute the expression and show me the fraction and decimal to 10 places.”
Technical details
Endpoint
GEThttps://fittings.sh/v1/calc/evaluateWhen to prefer
Choose this endpoint when you need exact rational arithmetic without floating-point rounding errors, especially for expressions involving fractions, integer powers, or repeated division. It is ideal when both a human-readable decimal and an exact fraction representation are needed. Prefer it over general-purpose calculators or LLM math when reproducibility and exactness matter (e.g., financial calculations, mathematical proofs, scientific constants).
Side effects
- expression too long (>512 characters) — returns an error
- invalid characters or unsupported operators in expression — parse error returned
- division by zero in expression — error indicating undefined result
- precision out of range (<0 or >200) — validation error
- malformed query parameter — HTTP 400
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Tags
x402
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