# HALOWERK Nordic Land – SoilGrids Silt Fraction (0-5 cm, Sweden)

> HALOWERK Nordic Land – SoilGrids Silt Fraction (0-5 cm, Sweden) 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 silt fraction of topsoil (0–5 cm depth) at a given WGS84 coordinate within Sweden, derived from SoilGrids data.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/se-soil-silt
- 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-soilgrids-silt-fraction-0-5-cm-sweden-17badc4f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_uOB_3hcFbSyi-6il06dfp

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-soilgrids-silt-fraction-0-5-cm-sweden-17badc4f -d '<json body>'
```

Example prompt: What's the mean silt fraction of the topsoil at latitude 59.33 and longitude 18.07 in Sweden? I need the SoilGrids value for the 0-5 cm layer.

## When to prefer this

Use this endpoint when you specifically need the silt fraction component of topsoil (0–5 cm) for a location within Sweden. It is distinct from sibling endpoints for sand, clay, pH, organic carbon, or coarse fragments. Prefer this over general soil APIs when you need Sweden-validated SoilGrids data with coordinate boundary enforcement and per-call micropayment pricing.

## Known failure modes

- Coordinate outside Sweden's Natural Earth boundary — request rejected before payment, error returned
- Latitude or longitude outside published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Invalid or missing coordinate fields — schema validation failure
- Service unavailable or upstream SoilGrids data gap — server error

## How this service works

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

## Output

A numeric value representing the mean silt fraction (likely as a percentage or g/kg) of the 0–5 cm topsoil layer at the queried coordinate, sourced from SoilGrids global soil data. Coordinates outside Sweden's Natural Earth boundary 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-soilgrids-silt-fraction-0-5-cm-sweden-17badc4f/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)