# HALOWERK Nordic Land – Iceland Soil Coarse-Fragment Volume (0-5 cm)

> HALOWERK Nordic Land – Iceland Soil Coarse-Fragment Volume (0-5 cm) is a paid API for AI agents from nordland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids coarse-fragment volume percentage for the 0–5 cm soil layer at a given coordinate within Iceland.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/is-soil-coarse-fragments
- 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-nordic-land-iceland-soil-coarse-fragment-volume-0-5-cm-125bec76
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_jGZov0X2Pglf78osi_UlC

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-nordic-land-iceland-soil-coarse-fragment-volume-0-5-cm-125bec76 -d '<json body>'
```

Example prompt: What's the SoilGrids coarse-fragment volume for the top 0–5 cm of soil at latitude 64.13 and longitude -21.94 in Iceland?

## When to prefer this

Choose this endpoint when you specifically need coarse-fragment volume data for a location in Iceland at the 0–5 cm depth, backed by SoilGrids, and accessed via a pay-per-call x402 micropayment API. It is ideal for geospatial agents enriching soil datasets, performing agricultural suitability checks, or conducting environmental assessments without needing a full SoilGrids subscription.

## Known failure modes

- Coordinate outside Iceland boundary — request rejected before payment, error indicating invalid location
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Malformed or missing coordinate fields — schema validation error
- Upstream SoilGrids data unavailable for the given point — service error or null result

## How this service works

Mean SoilGrids coarse-fragment volume for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Iceland; results outside it are rejected before payment.

## Output

A numeric value representing the mean volumetric coarse-fragment content (percentage) of the 0–5 cm soil layer at the requested coordinate, derived from SoilGrids. The coordinate is validated against the Iceland boundary; requests outside Iceland 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-nordic-land-iceland-soil-coarse-fragment-volume-0-5-cm-125bec76/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)