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ONE Engine Percent Change Calculator
x402
ONE Engine Percent Change Calculator is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0011/call, status unknown (last checked 2026-10-02).
Computes the percentage change between two numbers, returning the result as a numeric value.
Price / call$0.0011
Success—
StatusUnknown
How this service works
Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.
Output
Returns a JSON object with a single field `percent_change` containing the numeric percentage change from the `from` value to the `to` value (e.g., {"percent_change": 25} for a 25% increase from 80 to 100).
Example use cases
Stock price change tracker
“Calculate the percent change in stock price from $142.50 yesterday to $158.75 today — I need the exact percentage gain.”
Monthly revenue growth report
“My revenue was $45,000 last month and $52,000 this month. What's the percentage change between those two numbers?”
Weight loss progress tracker
“I started at 210 pounds and now weigh 187 pounds. What's the percent change in my weight?”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v1/number/percent-change?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need a quick, cheap, pay-per-call computation of percent change within an autonomous agent pipeline on Base using x402, avoiding the overhead of implementing the math locally or calling a heavier analytics API. Best when already integrated with the ONE Engine x402 payment flow.
Side effects
- Missing `from` or `to` fields returns an error or undefined behavior
- Division by zero if `from` is 0 (no valid percent change baseline)
- Non-numeric inputs may cause computation failure
- Payment failure via x402 if insufficient USDC balance on Base
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | number | |
| from | number |
Output
Schema · Response
{
"type": "json",
"example": {
"percent_change": 25
}
}Tags
x402
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