# HALOWERK Central Land – Slovenia Soil CEC (0–5 cm)

> HALOWERK Central Land – Slovenia Soil CEC (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 WGS84 coordinate within Slovenia.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/si-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-slovenia-soil-cec-0-5-cm-d1cac922
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XWInWP_2P5BHop3Eja4rp

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-slovenia-soil-cec-0-5-cm-d1cac922 -d '<json body>'
```

Example prompt: What is the SoilGrids cation exchange capacity for the 0–5 cm soil layer at latitude 46.07 and longitude 14.51 in Slovenia?

## When to prefer this

Use this endpoint when you need SoilGrids CEC data specifically for a point within Slovenia and want boundary validation built in. Prefer it over generic soil APIs when your workflow requires guaranteed geographic scoping to Slovenia and a cost-per-call micropayment model via x402.

## Known failure modes

- Coordinate outside Slovenia boundary — rejected before payment, error indicating invalid location
- Latitude or longitude outside European coverage bounds (34–72.5°N, -31.5–40.5°E) — validation error
- Missing required latitude or longitude parameter — request error
- SoilGrids data unavailable for very remote or unmapped coordinates — no-data 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 Slovenia; results outside it are rejected before payment.

## Output

A numeric value representing the mean cation exchange capacity (CEC) in cmolc/kg for the 0–5 cm soil depth at the queried Slovenian coordinate, sourced from SoilGrids. Coordinates outside Slovenia are rejected before the response is returned.

## 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-slovenia-soil-cec-0-5-cm-d1cac922/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)