# HALOWERK Central Land – Austria Soil Clay Fraction (0-5 cm)

> HALOWERK Central Land – Austria Soil Clay Fraction (0-5 cm) is a paid API for AI agents from mitteleuropa.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids clay fraction for the 0-5 cm depth layer at a given coordinate within Austria, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/at-soil-clay
- 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-central-land-austria-soil-clay-fraction-0-5-cm-e727cdd1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QHUavyk-XfSKODD1UvpIn

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-central-land-austria-soil-clay-fraction-0-5-cm-e727cdd1 -d '<json body>'
```

Example prompt: What is the mean clay fraction in the top 5 cm of soil at latitude 47.5 and longitude 14.2 in Austria?

## When to prefer this

Use this endpoint when you need SoilGrids clay fraction specifically for a point within Austria, and want boundary validation built in so you are not charged for out-of-scope coordinates. Prefer this over generic SoilGrids API access when you need a pay-per-call micropayment model with no subscription, and when your use case is Austria-specific.

## Known failure modes

- Coordinate outside Austria boundary — request is rejected with an error before payment
- Coordinates outside the European coverage range (lat 34–72.5, lon -31.5–40.5) are rejected at input validation
- Missing or invalid latitude/longitude types return a schema validation error
- No soil data available for the given point (e.g. water body or data gap) may return null or an error

## How this service works

Mean SoilGrids clay fraction for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Austria; results outside it are rejected before payment.

## Output

Returns the mean clay fraction (as a proportion or percentage) from SoilGrids for the 0-5 cm soil depth at the queried coordinate. Coordinates outside Austria'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-central-land-austria-soil-clay-fraction-0-5-cm-e727cdd1/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from mitteleuropa.halowerk.com](https://www.zero.xyz/host/mitteleuropa.halowerk.com/llms.txt)