# HALOWERK Baltic Land – Germany Soil Clay Fraction (0-5 cm)

> HALOWERK Baltic Land – Germany Soil Clay Fraction (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 clay fraction for the 0–5 cm soil layer at a given WGS84 coordinate within Germany, validated against the Natural Earth boundary.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-soil-clay
- 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-clay-fraction-0-5-cm-aaf161da
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_bQZLlfaKTDbp_bNB994wI

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-clay-fraction-0-5-cm-aaf161da -d '<json body>'
```

Example prompt: What's the mean clay fraction in the top 5 cm of soil at latitude 51.8 and longitude 10.2 in Germany? I need this for a soil characterization project.

## When to prefer this

Use this endpoint when you need topsoil (0–5 cm) clay fraction specifically for a German location and want boundary-validated, SoilGrids-sourced data. Prefer it over generic geospatial APIs when soil texture composition is the target variable and Germany is the area of interest. The pre-payment coordinate validation reduces wasted spend on out-of-bounds queries.

## Known failure modes

- Coordinate outside Germany boundary: request rejected before payment, returns validation error
- Latitude or longitude outside published European coverage range (lat 34–72.5, lon -31.5–40.5): schema validation failure
- Malformed or missing coordinate parameters: returns input error
- Network timeout or upstream SoilGrids data unavailability: service error

## How this service works

Mean SoilGrids clay fraction 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 clay fraction value (likely as a proportion or percentage) derived from SoilGrids data for the 0–5 cm soil depth layer at the requested German coordinate. Coordinates outside the Natural Earth boundary for Germany 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-clay-fraction-0-5-cm-aaf161da/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)