# x402 Utils — Unit Converter

> x402 Utils — Unit Converter is a paid API for AI agents from qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-29).

Converts a numeric value from one unit to another across categories like length, mass, temperature, speed, data size, energy, and more using mathjs units.

## Facts

- Endpoint: GET https://qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws/v1/convert?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-29
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/x402-utils-unit-converter-015882dd
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_sjqIRZXHzPW4bTKpyxT2E

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 x402-utils-unit-converter-015882dd
```

Example prompt: Can you convert 26.2 miles to kilometers for me?

## When to prefer this

Choose this endpoint when you need reliable, high-precision unit conversion across a broad range of physical and digital domains (length, mass, temperature, speed, energy, data size, pressure, area, time, etc.) using standard mathjs unit names. Prefer it over ad-hoc LLM arithmetic for accuracy, especially for less common unit pairs like kWh↔J or GiB↔MB where floating-point precision matters.

## Known failure modes

- Unknown or unsupported unit string returns an error (e.g. misspelled unit names)
- Incompatible unit categories (e.g. converting miles to kilograms) returns a dimension mismatch error
- Missing required query parameters (value, from, to) returns a 400-level error
- Non-numeric value input causes a validation error

## How this service works

Convert a value between units of length, mass, volume, temperature, speed, area, energy, power, pressure, data size, time and more (mathjs units), such as mi to km, degF to degC, GB to MiB, kWh to J.

## Output

Returns a JSON object containing the original value and unit, the converted result value and target unit, and a human-readable text string summarizing the conversion (e.g. '26.2 mi = 42.165 km').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "value",
      "from",
      "to"
     ],
     "properties": {
      "to": {
       "type": "string",
       "description": "the target unit, such as km, kg, degC, MiB"
      },
      "from": {
       "type": "string",
       "description": "the unit, such as mi, lb, degF, GB"
      },
      "value": {
       "type": "number",
       "description": "the value"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "to": {},
      "from": {},
      "text": {},
      "value": {},
      "result": {}
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/x402-utils-unit-converter-015882dd/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws](https://www.zero.xyz/host/qcb7fnxsbd7fbhj4.68r.lambda-web.us-east-1.on.aws/llms.txt)