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PennyRail Nano Percent Change Calculator
x402
PennyRail Nano Percent Change Calculator is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-22).
Computes the percent change (percentage change) between two numeric values
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a computed percent change value representing the relative difference between an original and new number, expressed as a percentage (e.g. +12.5 or -8.3). The response is a JSON object with the calculated change percentage.
Example use cases
Stock price movement analysis
“Calculate the percent change in this stock price — it went from $142.50 yesterday to $158.75 today. What's the percentage gain?”
Monthly revenue growth tracking
“Our revenue last month was $84,000 and this month it's $91,200. What's the percentage change between those two figures?”
Weight loss progress calculation
“I started at 195 pounds and now I'm at 178 pounds. What's my percent change in weight?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/p/nano/number.percent-change--change-percentage?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, machine-readable percent change computation without implementing the formula yourself. It is especially useful in automated pipelines where consistent formatting of percentage deltas is needed. Prefer this over a general-purpose math library call when you are already operating within the PennyRail x402 micropayment ecosystem and want a single consistent numeric transformation service.
Side effects
- Missing or malformed input numbers causing a 400 error
- Division by zero if original value is zero
- Non-numeric input values returning a validation error
- Payment failure (402) if USDC balance is insufficient
- Service unavailability on the Vercel deployment returning 503
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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