# HALOWERK Baltic Land – Germany Soil Cation Exchange Capacity (0-5 cm)

> HALOWERK Baltic Land – Germany Soil Cation Exchange Capacity (0-5 cm) is a paid API for AI agents from baltikum.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 Germany.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-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-baltic-land-germany-soil-cation-exchange-capacity-0-5-cm-1aef134a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bHOfElKom2nPSdXv6MxC6

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-baltic-land-germany-soil-cation-exchange-capacity-0-5-cm-1aef134a -d '<json body>'
```

Example prompt: What's the cation exchange capacity of the topsoil (0-5 cm) at latitude 52.52 and longitude 13.405 in Germany? I need the SoilGrids CEC value for that point.

## When to prefer this

Use this endpoint when you specifically need topsoil (0-5 cm) cation exchange capacity data for a point within Germany, sourced from SoilGrids. It is ideal for precision agriculture, soil quality assessments, environmental site evaluations, and land use planning workflows. Prefer this over generic soil APIs when you need Germany-validated, SoilGrids-backed CEC at micro-layer resolution.

## Known failure modes

- Coordinate outside Germany boundary — rejected before payment with a validation error
- Latitude or longitude out of the accepted European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Malformed or missing coordinate inputs — request rejected with parameter error
- SoilGrids data unavailable for extremely remote or unmapped German location — may return null or 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 Germany; results outside it are rejected before payment.

## Output

A numeric mean cation exchange capacity (CEC) value in cmolc/kg for the 0-5 cm soil layer at the specified coordinate, derived from SoilGrids data. The coordinate must fall within the Natural Earth boundary of Germany; requests outside this boundary are rejected before any payment is processed.

## 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-baltic-land-germany-soil-cation-exchange-capacity-0-5-cm-1aef134a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baltikum.halowerk.com](https://www.zero.xyz/host/baltikum.halowerk.com/llms.txt)