# BTU to Joule Energy Converter

> BTU to Joule Energy 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 value in British Thermal Units (BTU, international-table) to Joules using IEEE-754 double precision arithmetic.

## Facts

- Endpoint: GET https://x402-agent.kariguetoazul.workers.dev/api/units/energy/btu-to-joule?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/btu-to-joule-energy-converter-7013bd16
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0v3Fcx4mryQBGzSyjO2Kz

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 btu-to-joule-energy-converter-7013bd16
```

Example prompt: Convert 123.45 BTU to joules for me — I need the exact joule equivalent.

## When to prefer this

Choose this endpoint when you need a fast, precise, paid micro-API call to convert BTU to joules without running local arithmetic — especially useful in agentic pipelines requiring standardized SI energy units from imperial-unit data sources. Prefer it over a local calculation when auditability or a verified conversion result is needed.

## Known failure modes

- Missing or non-numeric 'value' query parameter returns a validation error
- Negative value rejected (minimum is 0 per schema)
- Value exceeding 1e+100 rejected (maximum bound exceeded)
- Payment not included or insufficient USDC triggers 402 Payment Required
- Network or worker downtime returns 5xx error

## 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 and unit ('from': 'btu'), the target unit ('to': 'joule'), the converted numerical result ('converted') computed with IEEE-754 double precision, and the dimension label ('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 international-table BTU."
      }
     },
     "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": "joule",
  "from": "btu",
  "value": 123.45,
  "converted": 130246.645005939,
  "dimension": "energy",
  "precision": "IEEE-754 double"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/btu-to-joule-energy-converter-7013bd16/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)