# The Stall Unit Converter

> 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)

## Facts

- Endpoint: GET https://the-stall.intuitek.ai/cap/unit-converter
- Price: $0.034/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/the-stall-unit-converter-66f52b11
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_d1QrMIcRlxD_y2m8pJwIO

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability the-stall-unit-converter-66f52b11
```

Example prompt: Convert 72 degrees Fahrenheit to Celsius for me — I need the exact converted value.

## When to prefer this

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.

## Known failure modes

- 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

## 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 request

```json
{
 "input": {
  "type": "http",
  "method": "GET",
  "queryParams": {
   "to": "c",
   "from": "f",
   "value": 72
  }
 }
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "required": {
   "type": "string"
  },
  "properties": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/the-stall-unit-converter-66f52b11/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from the-stall.intuitek.ai](https://www.zero.xyz/host/the-stall.intuitek.ai/llms.txt)