# HALOWERK Europe Land — SoilGrids Clay Fraction 0-5cm (250m Buffer)

> HALOWERK Europe Land — SoilGrids Clay Fraction 0-5cm (250m 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 SoilGrids clay fraction (0–5 cm depth) within a 250-metre circular buffer around a given European coordinate

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-soil-clay-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-clay-fraction-0-5cm-250m-buffer-5b715b22
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Plp1NzjNqVtzxF4D9yYte

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-clay-fraction-0-5cm-250m-buffer-5b715b22 -d '<json body>'
```

Example prompt: What's the mean clay fraction in the top 5 centimetres of soil within 250 metres of latitude 51.5 and longitude 4.2 in Europe?

## When to prefer this

Choose this endpoint when you need topsoil clay content specifically for a point location in Europe and want a spatially averaged (250m buffer) result rather than a raw pixel value or polygon-based estimate. It is ideal for site-level soil characterisation, agricultural planning, and land suitability analysis across any of the 30 covered European countries. Prefer sibling endpoints for other soil properties (pH) or other land cover metrics (cropland, grassland, tree cover).

## Known failure modes

- Coordinate outside European coverage bounds (latitude 34–72.5, longitude -31.5–40.5) returns an error
- Invalid or missing latitude/longitude values cause a validation error
- Coordinates in areas with no SoilGrids data coverage may return null or incomplete results
- Payment failure via x402 protocol prevents the call from being processed

## How this service works

Mean SoilGrids clay 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 single numeric value representing the mean clay fraction (standardized units, typically g/kg or % clay) for the 0–5 cm soil depth layer, averaged over a 250-metre circular buffer around the supplied coordinate. Coverage spans 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-clay-fraction-0-5cm-250m-buffer-5b715b22/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)