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ONE Engine Numeric Percent Change Calculator
x402
ONE Engine Numeric Percent Change Calculator is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.018/call, status unknown (last checked 2026-10-02).
Computes percent change values for an array of numbers, with optional scaling, offset, and range constraints.
Price / call$0.018
Success—
StatusUnknown
How this service works
Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.
Output
A JSON object containing the computed percent change results for the input array, potentially scaled by factor, shifted by offset, clamped to min/max bounds, and rounded to the specified number of decimal digits.
Example use cases
Stock price delta analysis
“I have daily closing prices [200, 215, 198, 225, 210] — can you compute the percent change between each consecutive value and round to 2 decimal places?”
Sensor reading normalization
“Take these sensor readings [0.5, 0.75, 0.6, 0.9, 0.8] and calculate their percent changes, applying a scale factor of 100 and clamping results between -100 and 100.”
Budget variance reporting
“Here are monthly budget figures [5000, 5300, 4800, 6100, 5900] — calculate the percent change for each and give me results rounded to 1 decimal place.”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/numeric/percent-change/t9?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, pay-per-call percent change computation with built-in options for scaling, offsetting, and range clamping — especially in autonomous agent workflows on Base where x402 micropayments are already in use. Prefer it over rolling your own computation when you want a single API call to handle rounding and constraint logic in one step.
Side effects
- Input array exceeds 1000 elements — request rejected
- Non-finite numbers (NaN, Infinity) in values array cause validation error
- Missing required 'values' field returns 400 error
- Division by zero when computing percent change from a zero baseline
- Payment not provided or insufficient USDC causes 402 Payment Required response
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| max | number | |
| min | number | |
| size | integer | |
| digits | integer | |
| factor | number | |
| offset | number | |
| valuesrequired | array | Finite numbers, maximum 1000 |
Output
Schema · Response
{
"type": "object",
"additionalProperties": true
}Tags
x402
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