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

> HALOWERK Central Land – Austria Soil Silt 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 2026-09-13).

Returns the mean SoilGrids silt fraction for the 0–5 cm topsoil layer at a given WGS84 coordinate within Austria, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/at-soil-silt
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-central-land-austria-soil-silt-fraction-0-5-cm-fa5acf90
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yTIlcOkkiJZMiEZJisPY2

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-silt-fraction-0-5-cm-fa5acf90 -d '<json body>'
```

Example prompt: What's the mean silt fraction in the top 5 cm of soil at latitude 47.5, longitude 14.2 in Austria?

## When to prefer this

Choose this endpoint when you need SoilGrids-derived topsoil silt fraction specifically for points within Austria and require boundary validation to ensure data integrity. It is ideal for agricultural analysis, soil texture classification, and environmental assessments scoped to Austria. For other European countries or broader coverage, look for sibling endpoints or alternative regional services.

## Known failure modes

- Coordinates outside Austria's Natural Earth boundary — request rejected with a boundary validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Invalid or missing coordinate values — input validation failure
- Payment failure via x402 protocol — call not executed
- Service unavailability — HTTP 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 Austria; results outside it are rejected before payment.

## Output

A numeric value representing the mean silt fraction (as a proportion or percentage) in the 0–5 cm topsoil layer at the specified Austrian coordinate, derived from SoilGrids data. Requests with coordinates outside Austria's Natural Earth boundary are rejected before processing.

## 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-silt-fraction-0-5-cm-fa5acf90/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)