# Klima Heating CO2 Calculator

> Klima Heating CO2 Calculator is a paid API for AI agents from klima.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-28).

Calculates CO2e emissions from heating energy consumption using a published heat emissions factor, with full provenance disclosure.

## Facts

- Endpoint: POST https://klima.halowerk.com/v1/heating-co2?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-28
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/klima-heating-co2-calculator-ec867675
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_8LgOr1z0czjHcyr2QbyDA

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 klima-heating-co2-calculator-ec867675 -d '<json body>'
```

Example prompt: Calculate the CO2e emissions for 12,500 kWh of natural gas heating using an emissions factor of 0.202 kgCO2e/kWh, sourced from the BEIS 2023 conversion factors report published at https://www.gov.uk/beis-2023-factors on 2023-06-15.

## When to prefer this

Choose this endpoint when you need auditable, source-backed heating CO2e calculations that disclose provenance and method — ideal for GHG inventories, ESG disclosures, carbon audits, or sustainability reports where transparency and traceability of the emissions factor are required. Prefer this over generic carbon calculators when you have a specific published heat factor and need null-safe handling of missing inputs with clear field-level disclosure.

## Known failure modes

- Missing required source fields (url, title, published_at) cause validation errors
- Energy or factor values outside allowed range (0 to 1e12) are rejected
- Null or absent energy_kwh or factor results in null emission output with field listed in unavailable_fields
- Malformed date-time strings for published_at trigger schema validation failure
- Invalid URI format for source URL returns a schema error

## How this service works

Calculates heating emissions from energy and a published heat factor. Missing facts are returned as null and named in unavailable_fields where applicable. Derived values disclose their method; source-backed values disclose source, time window and age. This is neither legal advice nor customs advice.

## Output

Returns calculated CO2e emissions in kg from the supplied energy and factor, along with provenance details (source, time window, age), method disclosure for derived values, and a list of unavailable_fields if any inputs were missing or null. All values are transparently annotated for audit and compliance use.

## 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",
    "bodyType"
   ],
   "properties": {
    "type": {
     "const": "http"
    },
    "method": {
     "const": "POST"
    },
    "bodyType": {
     "const": "json"
    },
    "schemaUrl": {
     "type": "string",
     "format": "uri"
    },
    "exampleUrl": {
     "type": "string",
     "format": "uri"
    }
   },
   "additionalProperties": true
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "const": "json"
    },
    "schemaUrl": {
     "type": "string",
     "format": "uri"
    },
    "exampleUrl": {
     "type": "string",
     "format": "uri"
    }
   },
   "additionalProperties": true
  }
 },
 "additionalProperties": true
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/klima-heating-co2-calculator-ec867675/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from klima.halowerk.com](https://www.zero.xyz/host/klima.halowerk.com/llms.txt)