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Touchstone Unit Converter
x402
Touchstone Unit Converter is a paid API for AI agents from touchstone.locomot.io, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Converts a numeric quantity from one unit of measurement to another within the same dimension (e.g. miles to kilometers, kg to pounds, °C to °F).
Price / call$0.001
Success—
StatusUnknown
How this service works
Deterministic unit conversion reproducing NIST SP 811 exact factors (length, mass, volume, energy, power, pressure, force, area, speed, data, angle, frequency + affine temperature). Every answer signed. Free sample, no payment required: GET /play/unit
Output
Returns the converted numeric result, the conversion factor applied, the physical dimension (e.g. length, mass, temperature), whether the conversion is exact, the source and target unit names, the input value, and the operation description.
Example use cases
Example prompt
“Convert 26.2 miles to kilometers for me — I need the exact result and want to know the conversion factor used.”
Technical details
Endpoint
GEThttps://touchstone.locomot.io/unitWhen to prefer
Choose this endpoint when you need a reliable, pay-per-call unit conversion with structured output including conversion factor and dimension metadata. Useful when you want machine-readable results (exact flag, dimension) rather than just a plain text answer, or when embedding unit conversion into an automated workflow.
Side effects
- Incompatible units (different dimensions) — e.g. converting kg to meters returns an error
- Unknown unit name or alias not recognized by the service
- Missing required query parameters (value, from, or to) returns a 400-style error
- Payment not attached or insufficient — returns HTTP 402 requiring x402 payment of $0.001 USDC
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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