# HALOWERK Baltic Land – SoilGrids Coarse-Fragment Volume (0-5 cm, Germany)

> HALOWERK Baltic Land – SoilGrids Coarse-Fragment Volume (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 coarse-fragment volume percentage for the 0–5 cm soil layer at a given WGS84 coordinate validated against the Germany boundary.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-soil-coarse-fragments
- 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-coarse-fragment-volume-0-5-cm-germany-4e86e951
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KIm59hXmMgjTm8wfhQi_7

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-coarse-fragment-volume-0-5-cm-germany-4e86e951 -d '<json body>'
```

Example prompt: What's the SoilGrids coarse-fragment volume in the 0–5 cm soil layer at latitude 51.5 and longitude 10.2 in Germany?

## When to prefer this

Choose this endpoint when you need point-level SoilGrids coarse-fragment volume data specifically for locations within Germany, with built-in boundary validation and micropayment-per-query pricing via x402. Prefer it over general SoilGrids API access when you need a low-friction, pay-per-use lookup with no API key management, or when enriching German geospatial datasets with soil stoniness at the 0–5 cm depth.

## Known failure modes

- Coordinate outside Germany boundary — request rejected before payment, returns a boundary validation error
- Coordinate within European bounding box but outside Germany — rejected by Natural Earth Germany polygon check
- Malformed or out-of-range latitude/longitude values — schema validation error
- SoilGrids upstream data unavailable for the requested point — may return null or an error response
- Network or payment processing failure — x402 payment not accepted

## How this service works

Mean SoilGrids coarse-fragment volume 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 value representing the mean volumetric coarse-fragment (gravel/stone) percentage in the 0–5 cm soil layer at the queried coordinate, sourced from SoilGrids. Coordinates outside the Germany boundary are rejected before 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-soilgrids-coarse-fragment-volume-0-5-cm-germany-4e86e951/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)