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ONE Engine Percent Change (t1)
x402
ONE Engine Percent Change (t1) is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0005/call, status unknown (last checked 2026-10-02).
Computes percent change between consecutive numeric values in a provided array, with optional scaling and bounding parameters.
Price / call$0.0005
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 containing computed percent change values for each consecutive pair in the input array, optionally scaled by a factor, offset, clamped to min/max bounds, sized to a specific output length, and rounded to a specified number of decimal digits.
Example use cases
Stock price movement analysis
“I have a list of daily closing prices — [200, 210, 205, 220, 215, 230] — can you calculate the percent change from one day to the next, rounded to 2 decimal places?”
Revenue growth rate tracking
“Here are my monthly revenue figures for the past year: [50000, 52000, 49000, 55000, 58000, 61000, 60000, 63000, 67000, 65000, 70000, 74000]. Compute the percent change between each consecutive month.”
Sensor reading delta computation
“I've got a series of sensor readings [1.02, 1.08, 0.97, 1.15, 1.10] and I need the percent change between each reading, scaled by a factor of 1 and clamped between -100 and 100.”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v3/numeric/percent-change/t1?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a lightweight, low-cost ($0.0005 USDC) pay-per-call computation of sequential percent changes on a numeric array without standing up your own compute infrastructure. Ideal for AI agents running on Base that need on-demand statistical transformation without managing servers or libraries.
Side effects
- Input array exceeds 1000 elements — request rejected
- Non-finite numbers (NaN, Infinity) in values array cause computation errors
- Missing required 'values' field returns a validation error
- Payment not included or invalid x402 payment header causes 402 response
- Division by zero when a value is 0 and percent change is undefined
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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