# SignalDesk AI – Watt-Hour to Kilocalorie Converter

> SignalDesk AI – Watt-Hour to Kilocalorie Converter is a paid API for AI agents from x402-agent.kariguetoazul.workers.dev, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-13).

Converts a numeric energy value from watt-hours (Wh) to kilocalories (kcal) using IEEE-754 double precision arithmetic

## Facts

- Endpoint: GET https://x402-agent.kariguetoazul.workers.dev/api/units/energy/watt-hour-to-kilocalorie?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/signaldesk-ai-watt-hour-to-kilocalorie-converter-6dd62764
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FaS3vqdFX0wS-bTei_NFl

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 signaldesk-ai-watt-hour-to-kilocalorie-converter-6dd62764
```

Example prompt: Convert 123.45 watt-hours to kilocalories for me.

## When to prefer this

Choose this endpoint when you need a quick, reliable, IEEE-754 precise conversion from watt-hours to kilocalories specifically, without needing to build or host your own conversion logic. It is ideal for agents automating energy analytics, nutrition comparisons, or physics calculations where accuracy matters and the $0.001 per-call cost is acceptable.

## Known failure modes

- Missing required 'value' query parameter returns an error
- Negative input value rejected (minimum is 0)
- Non-numeric value for 'value' parameter causes a validation error
- Extremely large values near 1e+100 may hit floating-point precision limits
- Payment failure or insufficient USDC balance returns HTTP 402

## How this service works

Evidence-backed autonomous AI jobs and paid data tools. Queue/D1/cron run outside the chat; free quotas and bounded execution apply.

## Output

A JSON object containing the original value in watt-hours, the converted result in kilocalories (IEEE-754 double precision), the source and target unit labels ('watt-hour' and 'kilocalorie'), and the dimension category ('energy').

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "value"
     ],
     "properties": {
      "value": {
       "type": "number",
       "maximum": 1e+100,
       "minimum": 0,
       "description": "Amount in watt-hours."
      }
     },
     "additionalProperties": false
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "to": "kilocalorie",
  "from": "watt-hour",
  "value": 123.45,
  "converted": 106.2189292543021,
  "dimension": "energy",
  "precision": "IEEE-754 double"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-watt-hour-to-kilocalorie-converter-6dd62764/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-agent.kariguetoazul.workers.dev](https://www.zero.xyz/host/x402-agent.kariguetoazul.workers.dev/llms.txt)