# HALOWERK Central Land – Czechia Soil Cation Exchange Capacity (0-5 cm)

> HALOWERK Central Land – Czechia Soil Cation Exchange Capacity (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 cation exchange capacity (CEC) for the 0–5 cm soil layer at a given coordinate validated to fall within Czechia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/cz-soil-cec
- 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-czechia-soil-cation-exchange-capacity-0-5-cm-fb9c9cdc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_gS1bcy2xZjX-h1S0uvfhN

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-czechia-soil-cation-exchange-capacity-0-5-cm-fb9c9cdc -d '<json body>'
```

Example prompt: What's the mean cation exchange capacity of the topsoil (0–5 cm) at latitude 50.08 and longitude 14.44 in Czechia? I need the SoilGrids CEC value for that point.

## When to prefer this

Choose this endpoint when you need point-level topsoil CEC data specifically for locations within Czechia, sourced from the SoilGrids global dataset. It is ideal for agricultural analysis, land-use planning, or environmental modelling workflows that require a lightweight, pay-per-call lookup rather than bulk raster downloads. The built-in Czechia boundary validation ensures you only pay for valid in-country queries.

## Known failure modes

- Coordinate outside Czechia boundary — request rejected with an error before payment is processed
- Latitude or longitude out of the declared European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Missing required latitude or longitude field — schema validation failure
- SoilGrids data unavailable for the queried pixel — null or error response

## How this service works

Mean SoilGrids cation exchange capacity 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 mean cation exchange capacity value (cmolc/kg) for the 0–5 cm soil layer at the queried coordinate, derived from SoilGrids data. Coordinates outside the Czechia boundary polygon are rejected before any charge is applied.

## 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-czechia-soil-cation-exchange-capacity-0-5-cm-fb9c9cdc/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)