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Sindri Unit Converter (Length, Mass, Volume, Temperature)
x402
Sindri Unit Converter (Length, Mass, Volume, Temperature) is a paid API for AI agents from x402.outpimp.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Converts numeric values between units of length, mass, volume, and temperature using exact conversion factors and correct affine formulas for temperature.
Price / call$0.01
Success—
StatusUnknown
How this service works
Unit conversion for length, mass, volume, and temperature using exact conversion factors (temperature uses the correct affine formulas, not simple multiplication).
Output
Returns the converted numeric value in the target unit, computed using exact conversion factors. Temperature conversions use proper affine formulas (e.g., °C to °F = multiply by 9/5 then add 32) rather than simple multiplication.
Example use cases
Recipe unit conversion for cooking
“I need to convert 2.5 cups to milliliters for this recipe — it's a volume conversion.”
International shipping weight conversion
“Convert 15 pounds to kilograms for a mass conversion — I need it for a shipping label.”
Body temperature Celsius to Fahrenheit
“Convert 38.5 degrees Celsius to Fahrenheit — that's a temperature conversion so make sure you use the right formula, not just multiplication.”
Technical details
Endpoint
POSThttps://x402.outpimp.com/unitConvertWhen to prefer
Choose this endpoint when you need accurate unit conversion for common physical quantities — especially temperature, where naive multiplication gives wrong results. Prefer it over generic calculators when you need exact conversion factors for length (meters/feet/miles/inches/cm), mass (kg/lb/g/oz), volume (liters/gallons/ml/cups/fl oz), or temperature (Celsius/Fahrenheit/Kelvin). It complements the sibling scientific unit converter (pressure, energy, molarity) on the same host.
Side effects
- Unsupported unit string returns an error indicating the unit is not recognized
- Mismatched category and units (e.g., passing 'kg' as a length unit) returns a validation error
- Missing required fields (value, from, to, category) return a 400-level error
- Invalid category enum value returns a schema validation error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| to | string | Target unit. |
| from | string | Source unit, e.g. "m", "kg", "gal", "C". |
| value | number | The numeric value to convert. |
| category | string | Unit category. |
Tags
x402
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