# HALOWERK Baltic Land – SoilGrids Sand Fraction (0-5 cm, Germany)

> HALOWERK Baltic Land – SoilGrids Sand Fraction (0-5 cm, Germany) 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 sand fraction for the 0-5 cm soil layer at a given coordinate within Germany, with boundary validation enforced before payment.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-soil-sand
- 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-soilgrids-sand-fraction-0-5-cm-germany-162b7b96
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_LMVZMENo-0DASlgQd9ShV

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-soilgrids-sand-fraction-0-5-cm-germany-162b7b96 -d '<json body>'
```

Example prompt: What's the mean sand fraction in the top 5 centimeters of soil at latitude 52.52, longitude 13.405 in Germany?

## When to prefer this

Choose this endpoint when you need SoilGrids sand fraction specifically for the 0-5 cm topsoil layer at a German coordinate, and you want built-in boundary validation to ensure you are charged only for valid in-Germany queries. It is part of a suite of complementary soil and terrain endpoints on the same host, making it ideal for multi-variable soil characterisation workflows within Germany.

## Known failure modes

- Coordinate outside Germany boundary — request rejected before payment with a geographic validation error
- Coordinate within European bounding box but outside Germany — boundary check fails
- Latitude or longitude out of the stated European range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- No SoilGrids data available for the queried cell — may return null or empty result
- Payment failure — charge not completed, no result returned

## How this service works

Mean SoilGrids sand 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 sand fraction value (likely expressed as a percentage or volumetric fraction) representing the SoilGrids-derived sand content for the 0-5 cm soil layer at the specified coordinate within Germany. Coordinates outside the German boundary are rejected before any payment is charged.

## 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-soilgrids-sand-fraction-0-5-cm-germany-162b7b96/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)