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PennyRail Number Round
x402
PennyRail Number Round is a paid API for AI agents from pennyrail.vercel.app, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).
Rounds a numeric value to a specified number of decimal places via a paid micropayment API
Price / call$0.001
Success—
StatusUnknown
How this service works
Machine-readable settlement service
Output
Returns a JSON object with the operation name (e.g. 'round') and the rounded numeric result, plus any additional fields the service appends.
Example use cases
Round currency to cents
“I need to round 19.998 to 2 decimal places so I can display it as a proper dollar amount — can you run it through PennyRail's number rounding endpoint?”
Normalize sensor reading precision
“Take this sensor reading of 47.836291 and round it to 3 decimal places for me.”
Standardize computed ratio
“I calculated a ratio of 0.666666667 — can you round that to 4 decimal places so it's clean for my report?”
Technical details
Endpoint
POSThttps://pennyrail.vercel.app/api/f/number.roundWhen to prefer
Use this endpoint when you need a simple, pay-per-call numeric rounding operation without setting up your own compute infrastructure, or when operating in an agent pipeline that already uses x402 micropayment rails and needs arithmetic utilities on demand.
Side effects
- Missing required 'input' field returns a 400-level error
- Invalid or non-numeric value field causes computation failure
- Missing decimals specification may produce unexpected default precision
- Payment failure (insufficient USDC balance) blocks the request with a 402 status
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | {value,decimals} |
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| resultrequired | — | |
| operationrequired | string |
Tags
x402
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