# HALOWERK Eastern Land – Romania Soil Bulk Density (0-5 cm)

> HALOWERK Eastern Land – Romania Soil Bulk Density (0-5 cm) is a paid API for AI agents from ostland.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 WGS84 coordinate within Romania, rejecting coordinates outside the country boundary before charging.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-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-eastern-land-romania-soil-bulk-density-0-5-cm-9f91e256
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_hWwdDJfvCDG_aQRqN99yg

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-eastern-land-romania-soil-bulk-density-0-5-cm-9f91e256 -d '<json body>'
```

Example prompt: What's the mean soil bulk density for the 0-5 cm layer at latitude 45.7489, longitude 21.2087 in Romania?

## When to prefer this

Choose this endpoint when you need point-level SoilGrids bulk density for the surface soil layer (0-5 cm) specifically within Romania, and want automatic geographic boundary enforcement to avoid erroneous charges on out-of-scope coordinates. Prefer it over generic soil APIs when your workflow is Romania-specific and benefits from the built-in country validation gate.

## Known failure modes

- Coordinate outside Romania boundary – request rejected before payment, no result returned
- Coordinate within European coverage bounds but outside Romania – rejected by country validation
- Invalid latitude or longitude values outside the accepted European range – schema validation error
- Coordinate in a data-sparse region – may return a low-confidence or null SoilGrids value

## How this service works

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

## Output

A numeric mean bulk density value for the 0-5 cm topsoil layer at the queried Romanian coordinate, derived from SoilGrids data. If the coordinate falls outside Romania's Natural Earth 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-eastern-land-romania-soil-bulk-density-0-5-cm-9f91e256/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from ostland.halowerk.com](https://www.zero.xyz/host/ostland.halowerk.com/llms.txt)