# HALOWERK Eastern Land – Romania Local Relief Range

> HALOWERK Eastern Land – Romania Local Relief Range is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the local relief (max minus min sampled surface elevation) for a given coordinate within Romania, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/ro-local-relief
- Price: $0.003/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-local-relief-range-f9330b54
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_-1k4oSK3Basa5W7bjCERT

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-local-relief-range-f9330b54 -d '<json body>'
```

Example prompt: What's the local relief — the difference between the highest and lowest sampled surface elevation — at latitude 45.75, longitude 24.5 in Romania?

## When to prefer this

Choose this endpoint when you need local topographic relief specifically for a point in Romania, validated against official Natural Earth boundaries. It is ideal for terrain ruggedness assessment, site suitability, agricultural planning, or environmental modelling workflows scoped to Romania where a lightweight per-coordinate lookup is sufficient and full DEM downloads are unnecessary.

## Known failure modes

- Coordinate outside Romania boundary: request rejected before payment with a geographic validation error
- Latitude or longitude outside the accepted European coverage range (lat 34–72.5, lon -31.5–40.5): schema validation failure
- Invalid or malformed coordinate values: input validation error
- Service unavailable or upstream DEM data unreachable: 5xx error

## How this service works

Difference between maximum and minimum sampled surface elevation. The coordinate is validated against the Natural Earth boundary for Romania; results outside it are rejected before payment.

## Output

A numeric value representing the local relief — the difference in meters between the maximum and minimum sampled surface elevations within the analysis grid surrounding the given coordinate, restricted to validated points inside Romania.

## 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-local-relief-range-f9330b54/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)