# HALOWERK Atlantic Land – Luxembourg Soil Cation Exchange Capacity (0-5 cm)

> HALOWERK Atlantic Land – Luxembourg Soil Cation Exchange Capacity (0-5 cm) is a paid API for AI agents from atlantikland.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 WGS84 coordinate, validated to be within Luxembourg's borders.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/lu-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-atlantic-land-luxembourg-soil-cation-exchange-capacity-0-5-cm-223b8314
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_RU4U3IoL0veoyCJZpZIup

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-atlantic-land-luxembourg-soil-cation-exchange-capacity-0-5-cm-223b8314 -d '<json body>'
```

Example prompt: What's the mean cation exchange capacity of the topsoil (0–5 cm) at latitude 49.6116, longitude 6.1319 in Luxembourg? I need the SoilGrids CEC value for that location.

## When to prefer this

Use this endpoint when you need authoritative SoilGrids CEC data specifically for coordinates within Luxembourg, particularly for agricultural planning, land valuation, environmental assessment, or soil fertility analysis. Prefer this over generic soil APIs when Luxembourg boundary validation is required and when the SoilGrids 0–5 cm depth layer is the relevant metric.

## Known failure modes

- Coordinate outside Luxembourg boundary — request rejected before processing or payment
- Coordinate within European coverage range but outside Luxembourg — boundary validation failure
- Invalid latitude or longitude values (outside WGS84 European range 34–72.5°N, -31.5–40.5°E) — schema validation error
- No SoilGrids data available for the queried grid cell — null or missing value response
- Payment failure via x402 protocol — request not processed

## 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 Luxembourg; results outside it are rejected before payment.

## Output

A numeric mean cation exchange capacity value (in cmolc/kg or equivalent SoilGrids units) for the 0–5 cm soil layer at the queried coordinate, derived from the SoilGrids dataset. Returns an error if the coordinate falls outside Luxembourg's national boundary.

## 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-atlantic-land-luxembourg-soil-cation-exchange-capacity-0-5-cm-223b8314/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)