# HALOWERK Atlantic Land – France Soil Silt Fraction (0-5 cm)

> HALOWERK Atlantic Land – France Soil Silt Fraction (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 silt fraction for the 0–5 cm soil layer at a given coordinate within France.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/fr-soil-silt
- 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-silt-fraction-0-5-cm-34c010ee
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WDwji3QpZSSLtFg7jEpfM

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-silt-fraction-0-5-cm-34c010ee -d '<json body>'
```

Example prompt: What's the mean silt fraction in the top 5 cm of soil at latitude 47.2 and longitude 1.5 in France?

## When to prefer this

Choose this endpoint when you need precise, per-point SoilGrids silt fraction data for a specific location within France at the 0–5 cm depth. It is ideal for applications requiring validated French-territory geospatial soil texture data without building your own SoilGrids pipeline. The pre-payment boundary check avoids wasted charges for out-of-bounds coordinates. Prefer it over generic SoilGrids API access when pay-per-call x402 micropayment integration and France-specific validation are desired.

## Known failure modes

- Coordinate outside France boundary: request is rejected before payment with a validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5): schema validation failure
- Malformed input (non-numeric or missing lat/lon): 400-level error
- Service unavailable or upstream SoilGrids data outage: 5xx error

## How this service works

Mean SoilGrids silt fraction 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

Returns a numeric mean silt fraction value (likely as a percentage or g/kg proportion) for the 0–5 cm topsoil layer at the queried WGS84 coordinate, validated to lie within the French national boundary. Coordinates outside France 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-atlantic-land-france-soil-silt-fraction-0-5-cm-34c010ee/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)