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Percentage Difference & Percent-Change Calculator
x402
Percentage Difference & Percent-Change Calculator is a paid API for AI agents from x402.forgemesh.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Computes precise percentage values including percent difference, percent change, percent-of, and reverse-percent math between two numeric inputs.
Price / call$0.001
Success—
StatusUnknown
How this service works
Percentage difference and percent-change calculator comparing two numeric values, plus straightforward percent-of and reverse-percent math. For financial reporting, analytics dashboards, and comparison tools where an exact percentage — not an LLM's rounded guess — is what gets cited.
Output
Returns the computed percentage value as an exact numeric result for the requested operation (e.g., percent difference, percent change, percent-of, increase, or decrease) between the two input values.
Example use cases
Example prompt
“What is the exact percentage change from 1250 to 1487? Use the 'change' operation and give me the precise figure, not a rounded estimate.”
Technical details
Endpoint
POSThttps://x402.forgemesh.io/percentage-differenceWhen to prefer
Choose this endpoint when you need an authoritative, non-approximated percentage result suitable for citation in financial reports, analytics dashboards, or comparison tools — especially when LLM-generated estimates or rounding are unacceptable. Ideal for automated pipelines computing KPIs, growth rates, or proportional metrics at scale.
Side effects
- Missing required fields 'a' or 'b' — returns 400 error
- Invalid operation string not in allowed enum — returns 400 or error response
- Non-numeric strings passed for 'a' or 'b' — may return parsing error
- Division by zero when 'b' is 0 for certain operations — may return error or null
- Payment not provided or insufficient USDC — returns 402 Payment Required
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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