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

> HALOWERK Southern Land – Spain 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 soil layer at a given coordinate within Spain, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/es-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-spain-soil-bulk-density-0-5-cm-be852315
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lExXFGqMo3hLZTfr3me5E

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-spain-soil-bulk-density-0-5-cm-be852315 -d '<json body>'
```

Example prompt: What's the SoilGrids mean bulk density for the top 0-5 cm soil layer at latitude 37.39, longitude -5.99 — that's a site in Seville, Spain?

## When to prefer this

Use this endpoint when you need authoritative SoilGrids bulk density data specifically for locations within Spain, and want coordinate validation (rejecting non-Spanish points) built into the service before any payment is charged. Prefer it over generic soil APIs when you need per-point topsoil (0-5 cm) bulk density values with micropayment-per-call pricing via x402.

## Known failure modes

- Coordinate outside Spain boundary — request rejected before payment with a geographic validation error
- Latitude or longitude out of published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Invalid or missing coordinate fields — returns input validation error
- Endpoint unavailable or network timeout — HTTP 5xx or connection error
- Coordinate within European bounding box but outside Spain — rejected by Natural Earth boundary check

## How this service works

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

## Output

A numeric value representing the mean SoilGrids bulk density (g/cm³ or cg/cm³) for the 0-5 cm topsoil layer at the requested coordinate. Coordinates outside the Spain boundary are rejected before any payment is processed.

## 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-spain-soil-bulk-density-0-5-cm-be852315/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)