# HALOWERK Baltic Land – Estonia Tree Cover Share

> HALOWERK Baltic Land – Estonia Tree Cover Share is a paid API for AI agents from baltikum.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 Estonia.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/ee-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-baltic-land-estonia-tree-cover-share-1edd1f6c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vWC82ITrU5RESEYrzO0VB

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-baltic-land-estonia-tree-cover-share-1edd1f6c -d '<json body>'
```

Example prompt: What's the tree cover share according to ESA WorldCover 2021 for the location at latitude 58.3780 and longitude 26.7290 in Estonia?

## When to prefer this

Choose this endpoint when you need satellite-derived tree cover fraction specifically for a point location inside Estonia, sourced from the authoritative 2021 ESA WorldCover dataset. It is ideal for environmental assessments, land use planning, ecological research, or any workflow requiring validated, per-coordinate forest cover data for Estonian territory. Prefer this over generic land cover APIs when Estonia-specific boundary validation and per-pixel WorldCover classification accuracy are required.

## Known failure modes

- Coordinate outside Estonia boundary — rejected before payment with a validation error
- Latitude or longitude out of published European coverage range — schema validation failure
- Coordinate on the boundary or in coastal water areas may be ambiguous
- Service unavailable or timeout for the upstream land cover data

## How this service works

Share of ESA WorldCover 2021 pixels classified as tree cover. The coordinate is validated against the Natural Earth boundary for Estonia; 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 around the submitted coordinate. Only coordinates that fall within the Natural Earth boundary for Estonia are accepted; coordinates outside Estonia are rejected before any payment is processed.

## 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-baltic-land-estonia-tree-cover-share-1edd1f6c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baltikum.halowerk.com](https://www.zero.xyz/host/baltikum.halowerk.com/llms.txt)