# Klima Material CO2 Calculator

> Klima Material 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 embodied CO2e emissions by multiplying a material mass (kg) against a published emissions factor (kgCO2e/kg), returning transparent provenance for all derived values.

## Facts

- Endpoint: POST https://klima.halowerk.com/v1/material-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-material-co2-calculator-b770b81f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MxkJWSKkLEMbJhYhrOKY2

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-material-co2-calculator-b770b81f -d '<json body>'
```

Example prompt: Calculate the embodied CO2e emissions for 2500 kg of structural steel using a cradle-to-gate lifecycle boundary and a published factor of 1.85 kgCO2e/kg from the RICS 2023 carbon database (https://rics.org/carbon2023, published 2023-03-15).

## When to prefer this

Use this endpoint when you need a transparent, provenance-disclosing calculation of embodied CO2e emissions from a known material mass and a published factor — particularly for GHG scope 3 reporting, LCA workflows, building product carbon footprints, or supplier emission verification. Prefer it over manual computation when auditability and source disclosure are required, or when you need missing-field handling to be explicit rather than silently defaulted.

## Known failure modes

- Missing required mass_kg or material causes null emissions output with field listed in unavailable_fields
- Invalid or unreachable source URL may cause source provenance to be unavailable
- Factor outside plausible range for material may still be accepted — no cross-validation against material type
- Non-numeric or negative mass_kg rejected by schema validation
- Lifecycle boundary string not recognised may result in null boundary classification

## How this service works

Calculates embodied emissions from mass and a published material 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 the total embodied CO2e emissions in kgCO2e, the factor and mass used, the lifecycle boundary applied, the derivation method, and source provenance (URL, title, publication date, and data age). Any fields that could not be determined are returned as null and listed in unavailable_fields. All derived values disclose their calculation method; source-backed values disclose their source and time window.

## 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-material-co2-calculator-b770b81f/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)