# stat.halowerk.com Carbon Intensity

> stat.halowerk.com Carbon Intensity is a paid API for AI agents from stat.halowerk.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).

Returns CO₂ emissions for one or more countries on three simultaneous bases: per capita, per unit of PPP-adjusted GDP, and absolute megatonnes, each with its own time period and trend.

## Facts

- Endpoint: POST https://stat.halowerk.com/v1/carbon-intensity
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/stat-halowerk-com-carbon-intensity-c863a668
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7inKT8yVTtujGSMeRF-kj

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 stat-halowerk-com-carbon-intensity-c863a668 -d '<json body>'
```

Example prompt: Pull CO2 emissions for Germany, France, and Japan across all three bases — per capita, per unit of PPP-adjusted GDP output, and absolute megatonnes — covering the last 10 years, and include the trend for each.

## When to prefer this

Choose this endpoint when you need all three CO2 measurement bases simultaneously for one or more countries, especially when the distinction between per-capita burden, economic carbon efficiency, and absolute atmospheric contribution all matter. It is the right choice for sustainability benchmarking, ESG analysis, climate policy research, or any scenario requiring decomposed carbon accounting rather than a single aggregate figure.

## Known failure modes

- Unknown or unsupported country code returns an error or empty result
- Requested time window extends beyond available data coverage
- Data unavailable for a specific country-metric combination returns partial results or null
- Malformed POST body causes a 400 validation error
- Payment not settled triggers a 402 payment required response

## How this service works

Returns carbon dioxide emissions for one or more countries on three bases at once: per inhabitant, per unit of purchasing-power-adjusted output, and in absolute megatonnes, each with its own period and its trend over the requested window. Keeping the three apart is the point. Per capita answers how heavily a person there burdens the climate; per unit of output answers how efficiently value is produced; absolute answers what actually reaches the atmosphere.

## Output

Returns a structured response containing, for each requested country, CO2 emissions on three distinct bases: (1) per capita (tonnes per person), (2) per unit of PPP-adjusted GDP output (carbon intensity of the economy), and (3) absolute emissions in megatonnes — each accompanied by the data period covered and a trend indicator over the requested window.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "years": {
   "type": "integer",
   "default": 15,
   "maximum": 30,
   "minimum": 3
  },
  "countries": {
   "type": "array",
   "items": {
    "type": "string",
    "maxLength": 3,
    "minLength": 2
   },
   "maxItems": 10,
   "minItems": 1
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/stat-halowerk-com-carbon-intensity-c863a668/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from stat.halowerk.com](https://www.zero.xyz/host/stat.halowerk.com/llms.txt)