# HALOWERK Atlantic Land – Netherlands Soil CEC (0-5 cm)

> HALOWERK Atlantic Land – Netherlands Soil CEC (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 coordinate within the Netherlands boundary.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/nl-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-netherlands-soil-cec-0-5-cm-da3b4709
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-xMlA2AiYZqQkQ_SeO65V

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-netherlands-soil-cec-0-5-cm-da3b4709 -d '<json body>'
```

Example prompt: What's the mean cation exchange capacity of the topsoil (0-5 cm) at latitude 52.37 and longitude 4.89 in the Netherlands?

## When to prefer this

Use this endpoint when you need SoilGrids-derived mean cation exchange capacity specifically for the 0-5 cm topsoil layer at a point location within the Netherlands. It is preferable over generic SoilGrids API wrappers when you want built-in coordinate validation against the Netherlands boundary and a pay-per-call micropayment model with no subscription overhead. Pair with the organic carbon and slope sibling endpoints for a broader soil and terrain profile of the same location.

## Known failure modes

- Coordinate outside Netherlands boundary — rejected before payment, no charge incurred
- Latitude or longitude outside allowed European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Missing required latitude or longitude parameters — request error
- Network timeout or upstream SoilGrids data unavailability — service error

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

## Output

A numeric mean cation exchange capacity (CEC) value for the 0-5 cm soil layer at the specified coordinate, sourced from SoilGrids. The value is only returned if the coordinate falls within the validated Netherlands boundary; coordinates outside it are rejected before billing.

## 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-netherlands-soil-cec-0-5-cm-da3b4709/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)