# HALOWERK Central Land – Liechtenstein Soil Nitrogen (0-5 cm)

> HALOWERK Central Land – Liechtenstein Soil Nitrogen (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 total nitrogen concentration for the 0-5 cm topsoil layer at a given coordinate within Liechtenstein, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://mitteleuropa.halowerk.com/v1/li-soil-nitrogen
- 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-liechtenstein-soil-nitrogen-0-5-cm-dccfd9fa
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_MsTLGEI2RaV_hZHwRUMxt

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-liechtenstein-soil-nitrogen-0-5-cm-dccfd9fa -d '<json body>'
```

Example prompt: What's the mean total nitrogen in the 0-5 cm topsoil layer at latitude 47.14 and longitude 9.52 in Liechtenstein?

## When to prefer this

Choose this endpoint when you specifically need SoilGrids-derived mean total nitrogen for the 0-5 cm topsoil layer at a precise coordinate within Liechtenstein. It is the right choice for agricultural planning, environmental assessments, or soil nutrient mapping within Liechtenstein. Use sibling endpoints on the same host for other soil properties (pH, silt, CEC) or terrain metrics at the same location.

## Known failure modes

- Coordinate outside Liechtenstein boundary – rejected pre-payment with a boundary validation error
- Coordinate outside the broader European coverage range (lat 34–72.5, lon -31.5–40.5) – rejected with an input validation error
- Missing or malformed latitude/longitude – returns a schema validation error
- Upstream SoilGrids data unavailable – may return a 503 or timeout

## How this service works

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

## Output

A numeric value representing the mean total nitrogen concentration in the 0-5 cm topsoil layer at the requested coordinate, derived from SoilGrids data. Requests with coordinates outside the Liechtenstein Natural Earth boundary are rejected before 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-central-land-liechtenstein-soil-nitrogen-0-5-cm-dccfd9fa/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)