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The Stall Unit Converter
x402
The Stall Unit Converter is a paid API for AI agents from the-stall.intuitek.ai, paid per call via x402, $0.034/call, status unknown (last checked 2026-09-14).
Converts a numeric value from one unit of measurement to another (or returns all units in the same category if no target unit is specified)
Price / call$0.034
Success—
StatusUnknown
How this service works
Converts between 100+ units across 12 categories: length, weight, temperature, volume, speed, area, energy, pressure, data, time, angle, frequency. Handles mixed-case inputs (km, KM, Km all work). Returns the converted value plus all common units in the same category. Zero external calls — pure math.
Output
Returns the numeric result of converting the given value from the source unit (e.g. 'f', 'kg', 'mi', 'kwh', 'mph', 'gb', 'psi') to the target unit, or if no target unit is provided, returns conversions to all units in the same measurement category.
Example use cases
Example prompt
“Convert 72 degrees Fahrenheit to Celsius for me — I need the exact converted value.”
Technical details
Endpoint
GEThttps://the-stall.intuitek.ai/cap/unit-converterWhen to prefer
Use this endpoint when an AI agent needs to perform on-demand, pay-per-call unit conversions across a wide range of measurement categories (mass, distance, temperature, energy, speed, digital storage, pressure, etc.) without requiring an API key or account. Ideal for agents that need occasional or low-volume conversions billed in micro-USDC via x402 on Base mainnet.
Side effects
- Missing required 'value' or 'from' query parameters — returns 400 Bad Request
- Unrecognized or misspelled unit abbreviation — returns error or empty result
- Payment not provided or insufficient USDC on Base mainnet — returns 402 Payment Required
- Invalid numeric value (non-numeric string) — returns 400 or validation error
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"to": "c",
"from": "f",
"value": 72
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
{
"to": "c",
"from": "f",
"value": "72",
"result": 22.222222,
"category": "temperature",
"generated_at": "2026-06-12T05:12:56.802Z"
}Tags
x402
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