# HALOWERK Central Land – CZ Soil Organic Carbon (0-5 cm)

> HALOWERK Central Land – CZ Soil Organic Carbon (0-5 cm) is a paid API for AI agents from mitteleuropa.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids organic carbon content for the 0–5 cm topsoil layer at a given coordinate within Czechia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-soil-organic-carbon
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-central-land-cz-soil-organic-carbon-0-5-cm-0bc0296f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_aBxn26x2qOzlJj28fH7VZ

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 halowerk-central-land-cz-soil-organic-carbon-0-5-cm-0bc0296f -d '<json body>'
```

Example prompt: What's the mean topsoil organic carbon content in the top 5 cm of soil at latitude 49.8 and longitude 15.47 in Czechia?

## When to prefer this

Use this endpoint when you specifically need SoilGrids-derived organic carbon data for the 0–5 cm topsoil layer at a point location within Czechia. It is ideal for agricultural land assessment, environmental baseline studies, or soil quality analytics where Czech-specific boundary validation is required. Prefer it over generic global soil APIs when you want built-in Czechia boundary enforcement and micro-payment per-call pricing via x402.

## Known failure modes

- Coordinate outside Czechia boundary — rejected with an error before payment
- Latitude or longitude out of European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Missing required latitude or longitude parameter — request rejected
- No SoilGrids data available for the exact pixel — may return null or an interpolation error

## How this service works

Mean SoilGrids organic carbon for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Czechia; results outside it are rejected before payment.

## Output

A numeric value representing the mean SoilGrids organic carbon content (in g/kg or dg/kg as per SoilGrids convention) for the 0–5 cm soil layer at the requested coordinate. Requests with coordinates outside the Czechia boundary are rejected before any payment is charged.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "maximum": 72.5,
   "minimum": 34,
   "description": "WGS84 latitude inside the published European coverage."
  },
  "longitude": {
   "type": "number",
   "maximum": 40.5,
   "minimum": -31.5,
   "description": "WGS84 longitude inside the published European coverage."
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-central-land-cz-soil-organic-carbon-0-5-cm-0bc0296f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)