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

> HALOWERK Southern Land – Portugal 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 Portugal, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/pt-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-portugal-soil-bulk-density-0-5-cm-de3a2e20
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_YQ16f8wVri1T8tmLDYGOF

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-portugal-soil-bulk-density-0-5-cm-de3a2e20 -d '<json body>'
```

Example prompt: What's the mean bulk density of the topsoil (0–5 cm layer) at latitude 38.72, longitude -9.14 in Portugal? I need it for a land assessment.

## When to prefer this

Choose this endpoint when you need point-specific topsoil bulk density data for locations within Portugal and want boundary-validated, pay-per-call access to SoilGrids data without managing a full SoilGrids API integration. Ideal for agents performing land assessments, agricultural planning, or environmental surveys scoped to Portugal.

## Known failure modes

- Coordinate outside Portugal boundary — rejected before payment with a boundary validation error
- Latitude or longitude outside the allowed European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Missing required latitude or longitude fields — request rejected with a parameter error
- Network or upstream SoilGrids data unavailability — 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 Portugal; results outside it are rejected before payment.

## Output

A numeric mean bulk density value (in kg/dm³ or g/cm³) for the 0–5 cm topsoil layer at the requested coordinate, sourced from SoilGrids data and validated to fall within Portugal's Natural Earth boundary. Coordinates outside Portugal 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-portugal-soil-bulk-density-0-5-cm-de3a2e20/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)