# HALOWERK Baltic Land – Lithuania Grassland Share

> HALOWERK Baltic Land – Lithuania Grassland 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 grassland for a given coordinate within Lithuania.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lt-grassland-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-lithuania-grassland-share-dd17e5d9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dtZmv1LoV6v-8MrEeKb_u

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-lithuania-grassland-share-dd17e5d9 -d '<json body>'
```

Example prompt: What share of the land around latitude 55.1, longitude 24.3 in Lithuania is classified as grassland according to ESA WorldCover 2021?

## When to prefer this

Use this endpoint when you need ESA WorldCover 2021 grassland land cover fractions specifically for points within Lithuania. It is purpose-built for Lithuanian coordinates with built-in boundary validation, making it safer and cheaper than a general-purpose land cover API that might charge for out-of-bounds queries. Prefer it for ecological, agricultural, or environmental workflows that need standardized 2021 satellite-derived grassland data at the pixel level.

## Known failure modes

- Coordinate outside Lithuania's Natural Earth boundary — request rejected, no charge
- Latitude or longitude outside European coverage bounds (lat 34–72.5, lon -31.5–40.5) — validation error
- Missing required latitude or longitude parameter — request rejected
- Coordinate in Lithuania but over water or urban area with no grassland pixels — returns zero share
- Network or service timeout — retry recommended

## How this service works

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

## Output

A numeric value representing the share (fraction or percentage) of ESA WorldCover 2021 pixels classified as grassland within the analysis area surrounding the provided coordinate in Lithuania. Coordinates outside Lithuania's 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-baltic-land-lithuania-grassland-share-dd17e5d9/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)