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x402 Utils – Arithmetic Expression Evaluator
x402
x402 Utils – Arithmetic Expression Evaluator is a paid API for AI agents from utils.kagurazaka.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-30).
Evaluates arithmetic expressions with 64 significant digits of precision, supporting operators, functions (sqrt, log, trig), constants, units, and statistics
Price / call$0.001
Success—
StatusUnknown
How this service works
Evaluate an arithmetic expression with 64 significant digits (no floating point surprises): operators, parentheses, powers, roots, logs, trigonometry, percentages, constants, units (5 inch to cm) and simple statistics.
Output
Returns a JSON object containing the original expression (expr), the result type (e.g. 'BigNumber'), a standard JavaScript number approximation (number), and a high-precision string result (result) with up to 64 significant digits.
Example use cases
Precise financial arithmetic
“Calculate 0.1 + 0.2 + 0.3 for me with full precision — I keep getting floating point rounding errors in my code and need the exact result.”
Unit conversion in expression
“What is 5 inches plus 3 centimeters expressed in centimeters? I need a precise numeric answer.”
Scientific formula evaluation
“Can you evaluate log(1000) + sin(pi/6) - sqrt(144) for me with at least 10 significant digits of precision?”
Technical details
Endpoint
GEThttps://utils.kagurazaka.dev/v1/math?utm_source=zero.xyzWhen to prefer
Choose this endpoint when floating-point precision matters — e.g. financial calculations, scientific computing, or any scenario where standard IEEE 754 double precision is insufficient. It also handles unit conversions inline (e.g. '5 inch to cm') and supports a wide range of functions (trig, log, sqrt, percentages, statistics) making it a one-stop math evaluator without needing a full compute environment.
Side effects
- Expression exceeds 500 characters — server returns error
- Invalid or malformed expression syntax — server returns parse error
- Unsupported function or operator — server returns error
- Division by zero — server returns error or Infinity
- Missing required 'expr' query parameter — returns 400 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"expr": "0.1 + 0.2",
"type": "BigNumber",
"number": 0.3,
"result": "0.3"
}
}Tags
x402
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