# HALOWERK Nordic Land – Local Relief (Norway)

> HALOWERK Nordic Land – Local Relief (Norway) 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 (max minus min sampled surface elevation) for a WGS84 coordinate validated within Norway's boundary.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/no-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-norway-2c4587d1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2tJqUm1gsolPtEEpGU_25

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-norway-2c4587d1 -d '<json body>'
```

Example prompt: What's the local relief — the difference between the highest and lowest sampled elevation — at latitude 68.4, longitude 17.5 in Norway?

## When to prefer this

Choose this endpoint when you need a single, cost-effective local relief metric (max–min elevation difference) for a point in Norway. Prefer it over general DEM APIs when you need Norway-specific boundary validation and per-call microtransaction pricing. Use it alongside the sibling standard-deviation and max-gradient endpoints on the same host for a fuller terrain characterisation without switching providers.

## Known failure modes

- Coordinate outside Norway boundary — rejected before payment, no result returned
- Latitude or longitude out of published European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Malformed or missing coordinate fields — schema validation error
- Payment failure — x402 payment not completed, no result returned
- Service unavailable or upstream elevation data timeout

## How this service works

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

## Output

A numeric value representing the difference between the maximum and minimum sampled surface elevations (local relief) at the given coordinate within Norway, in meters. Coordinates outside the Norway 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-norway-2c4587d1/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)