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

> HALOWERK Nordic Land – Finland 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 volumetric coarse-fragment content (%) of the 0–5 cm soil layer for a given coordinate within Finland, sourced from SoilGrids.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/fi-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-finland-soil-coarse-fragment-volume-0-5-cm-16fe613a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_0AeDxyzlb4C4XKjZUkMMB

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-finland-soil-coarse-fragment-volume-0-5-cm-16fe613a -d '<json body>'
```

Example prompt: What's the mean coarse-fragment volume in the top 5 cm of soil at latitude 61.4978, longitude 23.7610 in Finland?

## When to prefer this

Choose this endpoint when you need point-level SoilGrids coarse-fragment volume specifically within Finland, and you want boundary validation baked in before payment is charged. Prefer it over generic SoilGrids API calls when working in an agentic x402 payment workflow or when Finland-specific validation and per-call micro-pricing ($0.004 USDC) are desirable.

## Known failure modes

- Coordinate outside Finland boundary — rejected pre-payment with a geographic validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- SoilGrids data unavailable for the exact coordinate (e.g. ocean or unmapped area) — may return null or error
- Malformed request body — 400 bad request
- Payment failure via x402 protocol — request not processed

## 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 Finland; results outside it are rejected before payment.

## Output

A numeric value representing the mean volumetric coarse-fragment content (%) of the 0–5 cm soil layer at the queried coordinate, derived from SoilGrids data. Coordinates outside Finland's Natural Earth boundary are rejected before any 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-nordic-land-finland-soil-coarse-fragment-volume-0-5-cm-16fe613a/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)