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Pricing Math – Charm Price Rounding
x402
Pricing Math – Charm Price Rounding is a paid API for AI agents from pricing-math.x402tookit.com, paid per call via x402, $0.02/call, status unknown (last checked 2026-10-30).
Rounds a raw price to a charm ending (e.g. .99, .95, .5) or step-based ending (e.g. 9 at end of tens), in the nearest, up, or down direction.
Price / call$0.02
Success—
StatusUnknown
How this service works
Round a price to a charm ending such as .99 or .95, or to steps like 9 at the end of tens, up, down or nearest.
Output
Returns the rounded charm price, the price points immediately above and below, the absolute and percentage change from the input price, the step and ending used, the direction applied, and a human-readable summary of what was done.
Example use cases
Retail product charm pricing
“I just calculated a cost-plus price of $23.18 for a product — can you round that down to the nearest .99 so it looks better on the shelf?”
Tens-step psychological pricing
“My pricing model gives me $74.60 — round that to the nearest ending of 9 within tens steps (like 69 or 79), whichever is closest.”
Bulk price list charm rounding
“I have a wholesale price of $12.43 that I want to round up to the next .95 ending — what should the retail charm price be?”
Technical details
Endpoint
GEThttps://pricing-math.x402tookit.com/price-rounding?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need to snap a computed or raw price to a psychologically appealing charm ending (.99, .95, .5, or step-based endings like 9 in the tens digit). Prefer it over manual rounding logic when you need directional control (up/down/nearest) and want structured output including the nearby price points and change metrics for audit or display purposes.
Side effects
- Missing required 'price' query parameter returns an error
- Invalid 'direction' value (not nearest/up/down) may cause bad request
- Non-numeric price value causes validation failure
- Extremely large or negative prices may produce unexpected results if not validated upstream
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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