# HALOWERK Nordic Land – Sweden Water & Wetland Share

> HALOWERK Nordic Land – Sweden Water & Wetland Share 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 combined share of permanent water, herbaceous wetland, and mangrove land-cover classes for a given coordinate within Sweden.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/se-water-wetland-share
- 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-sweden-water-wetland-share-30bf783c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_thv-Yu7No2nQtPLMVspMy

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-sweden-water-wetland-share-30bf783c -d '<json body>'
```

Example prompt: What's the combined share of permanent water, wetland, and mangrove cover at latitude 59.33 and longitude 18.07 in Sweden?

## When to prefer this

Use this endpoint when you need a precise, paid, per-point land-cover fraction specifically for water, wetland, and mangrove classes within Sweden, and you need the coordinate validated against Sweden's official boundary before payment. Prefer this over general global land-cover APIs when Sweden-specific validation and cost-per-call accountability are important, or when integrating into an agentic pipeline that bills microtransactions via x402.

## Known failure modes

- Coordinate outside Sweden Natural Earth boundary — request rejected before payment, error indicating invalid or out-of-bounds location
- Coordinate within European coverage bounding box but outside Sweden — boundary validation rejects it
- Latitude or longitude out of published European range (lat 34–72.5, lon −31.5–40.5) — schema validation error
- Service unavailable or upstream data error — 5xx response
- Malformed request body — 4xx validation error

## How this service works

Combined share of permanent water, herbaceous wetland and mangrove classes. The coordinate is validated against the Natural Earth boundary for Sweden; results outside it are rejected before payment.

## Output

Returns a numeric value (typically a fraction or percentage) representing the combined share of permanent water, herbaceous wetland, and mangrove classes derived from ESA WorldCover 2021 data for the queried location within Sweden. Coordinates outside the Sweden Natural Earth boundary are rejected before any charge is incurred.

## 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-sweden-water-wetland-share-30bf783c/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)