# HALOWERK Southern Land – Malta Local Relief

> HALOWERK Southern Land – Malta Local Relief 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 topographic relief (max minus min elevation) for a coordinate point within Malta, computed from sampled surface elevation data.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/mt-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-malta-local-relief-10247f5c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_WCSuEE0V8ot0fU7x6TUY7

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-malta-local-relief-10247f5c -d '<json body>'
```

Example prompt: What's the local topographic relief — the difference between the highest and lowest surface elevation — at latitude 35.9 and longitude 14.4 in Malta?

## When to prefer this

Choose this endpoint when you need a precise, per-point local relief metric specifically within Malta, validated against official boundaries before billing. It is ideal for land assessment, terrain characterization, or geospatial enrichment workflows targeting Maltese coordinates, where you need the elevation amplitude (max minus min) rather than mean elevation, slope, or standard deviation (which are served by sibling endpoints on the same platform).

## Known failure modes

- Coordinate outside Malta boundary: rejected before payment with a validation error
- Latitude or longitude outside the European coverage range (lat 34–72.5, lon -31.5–40.5): input validation failure
- Malformed request body or missing required fields: HTTP 400 error
- Payment failure or insufficient USDC balance: HTTP 402 error
- Service unavailable or upstream elevation data source timeout: HTTP 5xx error

## How this service works

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

## Output

A numeric value representing the local topographic relief in meters — the difference between the maximum and minimum sampled surface elevation within the analysis neighborhood around the given coordinate. Coordinates outside the Natural Earth boundary for Malta are rejected before processing or payment.

## 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-malta-local-relief-10247f5c/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)