# SignalDesk AI – Megajoule to Kilocalorie Converter

> SignalDesk AI – Megajoule 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 an energy value from megajoules (MJ) to kilocalories (kcal) with IEEE-754 double precision.

## Facts

- Endpoint: GET https://x402-agent.kariguetoazul.workers.dev/api/units/energy/megajoule-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-megajoule-to-kilocalorie-converter-86a77804
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7WInoPArCCgJvlHF8CfPA

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-megajoule-to-kilocalorie-converter-86a77804
```

Example prompt: Convert 123.45 megajoules to kilocalories for me — I need the precise numeric result.

## When to prefer this

Use this endpoint when you need a quick, precise, single-call megajoule-to-kilocalorie conversion with no setup, libraries, or local computation required. Ideal for agents that need on-demand energy unit translation in nutrition, physics, or engineering contexts without embedding a unit-conversion library. Costs $0.001 USDC per call via x402, so suitable for occasional lookups rather than bulk batch conversions.

## Known failure modes

- Missing or non-numeric 'value' query parameter returns a 400 error
- Negative input values rejected (minimum is 0)
- Values exceeding 1e+100 rejected as out of range
- Payment not provided or invalid x402 payment header returns 402 Payment Required
- Rate limit or quota exceeded returns 429

## 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 megajoules, the converted value in kilocalories (IEEE-754 double precision float), the source unit ('megajoule'), the destination unit ('kilocalorie'), and the energy dimension label. Example: {from: 'megajoule', to: 'kilocalorie', value: 123.45, converted: 29505.25, dimension: 'energy', precision: 'IEEE-754 double'}.

## 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 megajoules."
      }
     },
     "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": "megajoule",
  "value": 123.45,
  "converted": 29505.25812619503,
  "dimension": "energy",
  "precision": "IEEE-754 double"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/signaldesk-ai-megajoule-to-kilocalorie-converter-86a77804/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)