# HALOWERK Nordic Land – Local Relief (Iceland)

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

Returns the local relief (difference between maximum and minimum sampled surface elevation) for a WGS84 coordinate validated against Iceland's boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/is-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-nordic-land-local-relief-iceland-0cb6dabf
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FIvbhW0BmmyIqD610PBiD

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-nordic-land-local-relief-iceland-0cb6dabf -d '<json body>'
```

Example prompt: What's the local relief — the difference between the highest and lowest sampled elevation — at latitude 64.13, longitude -21.94 in Iceland?

## When to prefer this

Choose this endpoint when you need a quick, point-level measure of terrain roughness or topographic variability for a specific coordinate within Iceland. It is ideal for applications that require a single scalar metric (elevation range) rather than a full DEM tile or slope raster. Use it when you need Iceland-specific validation built in, ensuring off-target coordinates are rejected before billing.

## Known failure modes

- Coordinate outside Iceland's Natural Earth boundary — request rejected with a validation error before payment
- Latitude or longitude out of the accepted European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- No elevation data available for the given coordinate — may return null or an error
- Network timeout or service unavailability — generic 5xx error

## How this service works

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

## Output

A numeric value representing the local relief in meters — the difference between the maximum and minimum sampled surface elevation within the analysis grid around the given coordinate. Coordinates outside Iceland's Natural Earth 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-nordic-land-local-relief-iceland-0cb6dabf/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)