# HALOWERK Atlantic Land – France Soil Coarse Fragment Volume (0-5 cm)

> HALOWERK Atlantic Land – France Soil Coarse Fragment Volume (0-5 cm) is a paid API for AI agents from atlantikland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids coarse-fragment volume (%) for the 0–5 cm soil layer at a given coordinate within France.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/fr-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-atlantic-land-france-soil-coarse-fragment-volume-0-5-cm-8d2df845
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZbRXZiFJ-qdkAPjzozWjw

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-atlantic-land-france-soil-coarse-fragment-volume-0-5-cm-8d2df845 -d '<json body>'
```

Example prompt: What's the coarse-fragment volume in the top 5 cm of soil at latitude 44.84, longitude -0.58 in France? I need the SoilGrids figure for that surface layer.

## When to prefer this

Use this endpoint when you need point-level topsoil coarse-fragment volume specifically within France and want a lightweight, pay-per-call lookup backed by SoilGrids data. Prefer it over general soil APIs when the geographic scope is France and the depth of interest is the 0–5 cm surface layer. It pairs naturally with sibling endpoints on the same host for CEC, organic carbon, slope, and land cover to build a comprehensive French land analysis.

## Known failure modes

- Coordinate outside France boundary: request rejected before payment, error indicating location is not within coverage area
- Latitude or longitude out of European range bounds (lat < 34 or > 72.5, lon < -31.5 or > 40.5): validation error
- Missing required latitude or longitude parameter: schema validation error
- Network or upstream SoilGrids data unavailability: service error response

## 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 France; results outside it are rejected before payment.

## Output

A numeric value representing the mean volumetric percentage of coarse fragments (stones, gravel) in the 0–5 cm topsoil layer at the queried French coordinate, sourced from the SoilGrids dataset. Coordinates outside France's Natural Earth boundary are rejected before any charge is applied.

## 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-atlantic-land-france-soil-coarse-fragment-volume-0-5-cm-8d2df845/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)