# HALOWERK Southern Land – Greece Soil Silt Fraction (0-5 cm)

> HALOWERK Southern Land – Greece Soil Silt Fraction (0-5 cm) is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-13).

Returns the mean SoilGrids silt fraction for the 0-5 cm soil layer at a given coordinate within Greece, validated against the Natural Earth boundary.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/gr-soil-silt
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-southern-land-greece-soil-silt-fraction-0-5-cm-c2100752
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_87jxRm19loehhG0VUZFap

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-southern-land-greece-soil-silt-fraction-0-5-cm-c2100752 -d '<json body>'
```

Example prompt: What is the mean silt fraction in the top 5 cm of soil at latitude 37.97 and longitude 23.73 in Greece?

## When to prefer this

Choose this endpoint when you need authoritative SoilGrids-derived silt fraction data specifically for locations within Greece at the 0-5 cm depth layer. It is ideal for agricultural analysis, land assessment, or soil texture modeling workflows focused on Greek territory. Use sibling endpoints on the same platform for other soil properties (clay, sand, pH, nitrogen, CEC) or other land metrics at the same coordinate.

## Known failure modes

- Coordinate outside Greece boundary — request rejected before payment with a boundary validation error
- Coordinate out of the published European coverage range (latitude 34–72.5, longitude -31.5–40.5) — schema validation error
- Invalid or missing latitude/longitude values — input validation error
- SoilGrids data unavailable for the queried cell — may return null or error
- Network timeout or service unavailability — HTTP 5xx 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 Greece; results outside it are rejected before payment.

## Output

A numeric value representing the mean silt mass fraction (typically expressed as g/kg or %) in the 0-5 cm topsoil layer at the queried coordinate, drawn from the SoilGrids dataset. Coordinates outside the Natural Earth boundary of Greece 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-southern-land-greece-soil-silt-fraction-0-5-cm-c2100752/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)