# HALOWERK Europe Land – SoilGrids Sand Fraction 0-5 cm (250 m Buffer)

> HALOWERK Europe Land – SoilGrids Sand Fraction 0-5 cm (250 m Buffer) is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Returns the mean sand fraction (%) from SoilGrids for the 0-5 cm soil layer, averaged over a 250-metre circular buffer around a given European coordinate.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-soil-sand-buffer-250m
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-europe-land-soilgrids-sand-fraction-0-5-cm-250-m-buffer-de5e1f1a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vWoQwJYCRiws-ie-364xV

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-europe-land-soilgrids-sand-fraction-0-5-cm-250-m-buffer-de5e1f1a -d '<json body>'
```

Example prompt: What's the mean sand fraction of the topsoil at latitude 48.85, longitude 2.35 in Paris — pull it from the 250-metre neighbourhood SoilGrids analysis?

## When to prefer this

Choose this endpoint when you need a spatially smoothed (250 m buffer) topsoil sand fraction estimate at a specific European point, derived from the globally consistent SoilGrids dataset, rather than raw pixel values or a different buffer size. Prefer it over the 60 m buffer sibling when site-level noise reduction is important and over polygon-based siblings when only a coordinate is available.

## Known failure modes

- Coordinate outside European coverage (lat 34–72.5, lon -31.5–40.5) returns an error or null
- Invalid or missing latitude/longitude fields return a validation error
- Payment failure or insufficient USDC balance blocks the request (x402 protocol)
- Service unavailability returns a 5xx error with no soil data

## How this service works

Mean SoilGrids sand fraction for the 0-5 cm layer. The service evaluates a circular 250 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A numeric value representing the mean SoilGrids sand fraction (standardized units) for the 0–5 cm soil depth layer, averaged over a 250-metre circular neighbourhood centred on the supplied WGS84 coordinate. Covers 30 European countries.

## 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-europe-land-soilgrids-sand-fraction-0-5-cm-250-m-buffer-de5e1f1a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroland.halowerk.com](https://www.zero.xyz/host/euroland.halowerk.com/llms.txt)