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Percent-Of Calculator
x402
Percent-Of Calculator is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).
Performs percentage math: calculates X% of Y, what percent one number is of another, or percent change between two values.
Price / call$0.001
Success—
StatusUnknown
How this service works
Percentage math calculator: find what X% of Y is, what percent one number is of another, or the percent change between two values. Built for pricing markups, discount math, grading, tipping, and reporting agents that need the exact figure instead of mental-math rounding errors.
Output
Returns the precise numerical result of the requested percentage operation — e.g. the value of X% of Y, the percent that A is of B, or the percent change/increase/decrease between two numbers.
Example use cases
Example prompt
“What is 18% of $74.50 — use the percent-of calculator with the 'of' operation so I get the exact tip amount without rounding errors.”
Technical details
Endpoint
POSThttps://x402.forgemesh.io/percent-of-calculatorWhen to prefer
Use this endpoint when an agent needs exact, error-free percentage arithmetic — such as computing discounts, markups, tips, grade percentages, or reporting growth rates — instead of relying on LLM mental math which is prone to rounding errors. Especially useful in pricing, financial, or grading workflows where precision matters.
Side effects
- Missing required fields a or b returns an error
- Invalid or unrecognized operation string returns an error
- Non-numeric strings passed as a or b cause a parsing error
- Division-by-zero scenario (e.g. is_what_percent with b=0) returns an error
- Payment failure or insufficient USDC balance blocks the request
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| a | string | |
| b | string | |
| operation | string | of | is_what_percent | change | increase | decrease |
Output
Schema · Response
{
"type": "json",
"example": {
"result": "25 %",
"operation": "% change 80 → 100"
}
}Tags
x402
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