# HALOWERK Nordic Land – Sweden Tree Cover Share

> HALOWERK Nordic Land – Sweden Tree Cover 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 share of ESA WorldCover 2021 pixels classified as tree cover for a given coordinate within Sweden.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/se-tree-cover-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-tree-cover-share-123c5f7c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_AVaMfpptwfPUqDtU0E_Y5

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-tree-cover-share-123c5f7c -d '<json body>'
```

Example prompt: What share of the area around latitude 59.33, longitude 18.07 in Sweden is classified as tree cover according to ESA WorldCover 2021?

## When to prefer this

Choose this endpoint when you specifically need ESA WorldCover 2021 tree cover share data for a point within Sweden. It is ideal for forestry assessments, environmental baseline studies, land-use analysis, or reforestation monitoring in the Swedish context. The built-in boundary validation against Sweden's Natural Earth boundary ensures data relevance. Pair with sibling endpoints on the same host for complementary soil, elevation, and land cover metrics.

## Known failure modes

- Coordinate outside Sweden boundary — rejected with validation error before payment
- Latitude or longitude outside the published European coverage bounds (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Malformed or missing coordinate fields — request rejected
- Payment failure — x402 payment not completed, request not processed

## How this service works

Share of ESA WorldCover 2021 pixels classified as tree cover. The coordinate is validated against the Natural Earth boundary for Sweden; results outside it are rejected before payment.

## Output

A numeric value representing the share (fraction or percentage) of ESA WorldCover 2021 pixels classified as tree cover within the analysis area surrounding the provided coordinate. Coordinates outside the Sweden 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-sweden-tree-cover-share-123c5f7c/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)