# HALOWERK Southern Land – Local Relief (Spain)

> HALOWERK Southern Land – Local Relief (Spain) is a paid API for AI agents from suedland.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 WGS84 coordinate within Spain.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/es-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-southern-land-local-relief-spain-6f3b577b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IitYoZvyi_P0Z8ReqUv7r

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-southern-land-local-relief-spain-6f3b577b -d '<json body>'
```

Example prompt: What's the local relief — the difference between the highest and lowest sampled elevations — at latitude 37.89, longitude -4.77 in Spain?

## When to prefer this

Choose this endpoint when you need terrain roughness or topographic variability at a specific point within Spain and want a simple scalar relief metric (max minus min elevation). It is purpose-built and validated for Spanish coordinates, making it more reliable than a generic elevation API that might not enforce geographic boundaries or sample consistently.

## Known failure modes

- Coordinate outside Spain's Natural Earth boundary — request rejected with validation error before payment
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Elevation data unavailable for remote or water-covered coordinates
- Network timeout or service unavailability returning 5xx error

## How this service works

Difference between maximum and minimum sampled surface elevation. The coordinate is validated against the Natural Earth boundary for Spain; 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 elevations within the analysis area centered on the given coordinate. Coordinates outside Spain's Natural Earth boundary are rejected before any charge is made.

## 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-southern-land-local-relief-spain-6f3b577b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)