# HALOWERK Southern Land – Greece Soil Bulk Density (0-5 cm)

> HALOWERK Southern Land – Greece Soil Bulk Density (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 2026-09-15).

Returns the mean SoilGrids bulk density for the 0–5 cm topsoil layer at a given coordinate within Greece, validated against the Natural Earth boundary.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/gr-soil-bulk-density
- 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-southern-land-greece-soil-bulk-density-0-5-cm-68506fcb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qRByZdFmUPLzLwba6krR9

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-bulk-density-0-5-cm-68506fcb -d '<json body>'
```

Example prompt: What's the SoilGrids bulk density for the top 5 cm of soil at latitude 37.97, longitude 23.73 in Greece? I need it for a land suitability assessment.

## When to prefer this

Choose this endpoint when you need point-level topsoil bulk density data specifically for a location within Greece and want boundary-validated results with per-call micropayment pricing. Prefer it over generic SoilGrids API access when you need guaranteed geographic scoping to Greece, or when integrating into an x402-compatible payment workflow. Sibling endpoints on the same platform cover complementary soil and land attributes (sand fraction, CEC, texture class, land cover) for the same coordinate.

## Known failure modes

- Coordinate outside Greece boundary (Natural Earth polygon) — request rejected before payment, no result returned
- Latitude or longitude out of stated range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Missing required latitude or longitude parameter — validation error
- SoilGrids data unavailable for sparse or coastal edge coordinates — may return null or error
- Network or upstream data source timeout — service error response

## How this service works

Mean SoilGrids bulk density 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 mean bulk density value (g/cm³ or kg/dm³) for the 0–5 cm topsoil layer at the requested coordinate, sourced from the SoilGrids dataset. If the coordinate falls outside the Greece boundary, the request is 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-southern-land-greece-soil-bulk-density-0-5-cm-68506fcb/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)