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

> HALOWERK Atlantic Land – Netherlands Soil Organic Carbon (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 2026-09-14).

Returns the mean SoilGrids organic carbon value for the 0-5 cm topsoil layer at a given WGS84 coordinate within the Netherlands boundary.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/nl-soil-organic-carbon
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-atlantic-land-netherlands-soil-organic-carbon-0-5-cm-5f6da8d7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ZEcqaLWitSYeZpbugiPhZ

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-organic-carbon-0-5-cm-5f6da8d7 -d '<json body>'
```

Example prompt: What is the mean soil organic carbon in the 0-5 cm topsoil layer at latitude 52.3676 and longitude 4.9041 in the Netherlands?

## When to prefer this

Choose this endpoint when you need point-based SoilGrids mean organic carbon values specifically for locations within the Netherlands at the 0-5 cm topsoil depth. It is distinct from sibling endpoints offering CEC, slope, land cover, or runoff metrics. Prefer this over generic soil APIs when boundary-validated Dutch coordinates and per-call micropayment pricing are acceptable.

## Known failure modes

- Coordinates outside the Netherlands Natural Earth boundary are rejected before payment is processed
- Latitude or longitude outside the declared European coverage range (lat 34-72.5, lon -31.5-40.5) will be rejected
- Missing required latitude or longitude fields return a validation error
- Malformed coordinate types (non-numeric) return a schema validation error
- Payment failure or insufficient USDC balance results in an HTTP 402 response

## How this service works

Mean SoilGrids organic carbon 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 soil organic carbon concentration (dg/kg or g/kg, per SoilGrids convention) for the 0-5 cm depth interval at the queried coordinate, derived from ISRIC SoilGrids global modeled soil data, valid only for coordinates that fall 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-organic-carbon-0-5-cm-5f6da8d7/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)