# HALOWERK Baltic Land – Lithuania Soil Nitrogen (0-5 cm)

> HALOWERK Baltic Land – Lithuania Soil Nitrogen (0-5 cm) is a paid API for AI agents from baltikum.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids total nitrogen content for the 0–5 cm soil layer at a given WGS84 coordinate within Lithuania.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lt-soil-nitrogen
- Price: $0.004/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-soil-nitrogen-0-5-cm-22189b7b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XvYzwGDmwWPyMXxP_tHQD

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-soil-nitrogen-0-5-cm-22189b7b -d '<json body>'
```

Example prompt: What is the mean total nitrogen in the top 5 cm of soil at latitude 55.1694, longitude 23.8813 in Lithuania? I need the SoilGrids value for that point.

## When to prefer this

Choose this endpoint when you specifically need SoilGrids total nitrogen data for a point location within Lithuania and want built-in boundary validation to ensure the coordinate is valid before incurring a charge. It is preferable to a general SoilGrids API call when you want a simple, pay-per-call microservice with pre-validated Lithuanian coverage and no need to manage authentication or data parsing yourself.

## Known failure modes

- Coordinate outside Lithuania boundary — request rejected before payment, error indicating invalid geographic scope
- Coordinate within European bounding box but outside Lithuania polygon — boundary validation failure
- Missing or malformed latitude/longitude — input validation error
- Coordinate in a water body or border edge case — potential rejection or null value
- Service unavailability or upstream SoilGrids data gap — HTTP error or null response

## How this service works

Mean SoilGrids total nitrogen for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Lithuania; results outside it are rejected before payment.

## Output

A numeric value representing the mean total nitrogen content (likely in g/kg or cg/kg as per SoilGrids conventions) for the 0–5 cm topsoil layer at the validated Lithuanian coordinate. Coordinates outside Lithuania's Natural Earth 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-baltic-land-lithuania-soil-nitrogen-0-5-cm-22189b7b/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)