# HALOWERK Atlantic Land – Belgium Soil Nitrogen (0-5 cm)

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

Returns the mean total nitrogen content (from SoilGrids) for the 0–5 cm topsoil layer at a given coordinate within Belgium.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/be-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-atlantic-land-belgium-soil-nitrogen-0-5-cm-51e49f5e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hQnAMoYl47AUMtthQzk2g

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-atlantic-land-belgium-soil-nitrogen-0-5-cm-51e49f5e -d '<json body>'
```

Example prompt: What's the mean total nitrogen in the 0-5 cm topsoil layer at latitude 50.85, longitude 4.35 in Belgium?

## When to prefer this

Use this endpoint when you need point-level SoilGrids total nitrogen data specifically for locations within Belgium. It is ideal for precision agriculture, land valuation, environmental assessments, and soil fertility analyses where a pre-validated, pay-per-call lookup is preferable to managing direct SoilGrids API access. The built-in Belgium boundary validation ensures you are not charged for out-of-scope queries.

## Known failure modes

- Coordinate outside Belgium boundary — request rejected before payment with a validation error
- Coordinate within European bounding box but outside Belgium polygon — boundary check failure
- Latitude or longitude outside the declared European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- SoilGrids data unavailable for the specific grid cell — may return null or error
- Malformed request body missing required latitude or longitude fields

## How this service works

Mean SoilGrids total nitrogen for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Belgium; 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 queried coordinate, sourced from SoilGrids. The coordinate is first validated against the Natural Earth boundary for Belgium; requests falling outside Belgium 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-atlantic-land-belgium-soil-nitrogen-0-5-cm-51e49f5e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)