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ONE Engine Number Sign
x402
ONE Engine Number Sign is a paid API for AI agents from one-search.one-engine.workers.dev, paid per call via x402, $0.0009/call, status unknown (last checked 2026-10-02).
Returns the mathematical sign of a given number (-1, 0, or 1) via a pay-per-call API.
Price / call$0.0009
Success—
StatusUnknown
How this service works
Low-cost pay-per-call utility APIs for autonomous agents using x402 on Base.
Output
A JSON object with a single 'value' field containing the mathematical sign of the input: -1 if the input is negative, 0 if zero, or 1 if positive.
Example use cases
Classify financial gain or loss
“Tell me the sign of -150.75 — I want to know if this delta is a loss, breakeven, or gain as -1, 0, or 1.”
Check sensor reading polarity
“Is the value 0.0032 positive, negative, or zero? Give me the sign as an integer.”
Determine direction of price movement
“I have a price change of -0.005 — what's its sign? I need -1, 0, or 1 to figure out which direction it moved.”
Technical details
Endpoint
POSThttps://one-search.one-engine.workers.dev/v1/number/sign?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need a fast, cheap, single-call signum function without spinning up your own compute — especially inside an agentic workflow where you want pay-per-use math utilities billed per call in USDC on Base.
Side effects
- Missing or non-numeric 'value' field in request body returns an error
- Non-finite values like NaN or Infinity may produce unexpected results
- Payment failure via x402 protocol blocks the call
- Network timeout on the Cloudflare Worker edge
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| value | number |
Output
Schema · Response
{
"type": "json",
"example": {
"value": -1
}
}Tags
x402
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