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

> HALOWERK Atlantic Land – Netherlands 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 SoilGrids total nitrogen concentration for the 0–5 cm depth layer at a given coordinate within the Netherlands.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/nl-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-netherlands-soil-nitrogen-0-5-cm-51894637
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_KJue_rkeTBXgaxUNycKov

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-netherlands-soil-nitrogen-0-5-cm-51894637 -d '<json body>'
```

Example prompt: What's the mean total nitrogen in the top 5 cm of soil at latitude 52.37, longitude 4.89 in the Netherlands?

## When to prefer this

Use this endpoint when you need point-level topsoil nitrogen data specifically for locations within the Netherlands, validated against official boundaries, and are comfortable with a pay-per-call micro-payment model. Prefer it over generic SoilGrids API access when you need boundary-enforced Netherlands-only queries with low per-call cost ($0.004 USDC). It is particularly suited for agricultural analysis, land valuation, and environmental monitoring workflows targeting Dutch land parcels.

## Known failure modes

- Coordinate outside Netherlands boundary — request rejected before payment is charged
- Coordinate within European bounding box but outside Netherlands Natural Earth polygon — returns validation error
- Latitude or longitude out of the European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Missing or malformed latitude/longitude fields — input validation error
- SoilGrids data unavailable for the specific location — may return null or no-data response

## How this service works

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

## Output

A numeric value representing the mean total nitrogen concentration in the 0–5 cm soil layer at the queried coordinate, derived from the SoilGrids dataset, for points validated to lie within the Netherlands boundary.

## 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-netherlands-soil-nitrogen-0-5-cm-51894637/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)