# HALOWERK Eastern Land – Hungary Local Relief

> HALOWERK Eastern Land – Hungary Local Relief is a paid API for AI agents from ostland.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Returns the local relief (difference between maximum and minimum sampled surface elevation) for a WGS84 coordinate within Hungary.

## Facts

- Endpoint: POST https://ostland.halowerk.com/v1/hu-local-relief
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-eastern-land-hungary-local-relief-2bdcfd51
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EehxgCIW4MNgyix2xA_li

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-hungary-local-relief-2bdcfd51 -d '<json body>'
```

Example prompt: What's the local relief — the difference between the highest and lowest nearby surface elevations — at latitude 47.5 and longitude 19.0 in Hungary?

## When to prefer this

Choose this endpoint when you need Hungary-specific local terrain relief data validated against official country boundaries, ensuring you are never charged for out-of-scope coordinates. It is ideal for geospatial workflows, land assessment, or environmental modeling focused on Hungarian territory where surface elevation variability at a point is the key metric.

## Known failure modes

- Coordinate outside Hungary boundary: rejected before payment, returns validation error
- Coordinate outside published European coverage bounds (lat 34–72.5, lon -31.5–40.5): rejected with input validation error
- Network or service unavailability: HTTP 5xx error
- Malformed or missing latitude/longitude fields: HTTP 4xx validation error
- Payment failure via x402 protocol: transaction not processed, no result returned

## How this service works

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

## Output

Returns a numeric value representing the local relief — the difference in meters between the maximum and minimum sampled surface elevations — at the specified coordinate within Hungary. Coordinates outside the Hungarian boundary are 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-hungary-local-relief-2bdcfd51/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)