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

> HALOWERK Baltic Land – Latvia 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 concentration for the 0–5 cm soil layer at a given coordinate within Latvia.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lv-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-latvia-soil-nitrogen-0-5-cm-3e1d1e87
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_H1KvsX366C8unkDGw3x9K

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-latvia-soil-nitrogen-0-5-cm-3e1d1e87 -d '<json body>'
```

Example prompt: What's the mean total nitrogen in the top 5 cm of soil at latitude 56.946 and longitude 24.105 in Latvia?

## When to prefer this

Choose this endpoint when you specifically need SoilGrids total nitrogen data for the 0–5 cm layer at a point location within Latvia. It is pre-scoped to Latvia with boundary validation, making it more reliable and cheaper to call than a broad European soil data service when your coordinate of interest is known to be in Latvia.

## Known failure modes

- Coordinate outside Latvia boundary — request rejected before payment, coordinate validation error returned
- Latitude or longitude out of European coverage range (34–72.5°N, -31.5–40.5°E) — schema validation error
- Missing required latitude or longitude parameter — bad request error
- Payment failure via x402 protocol — transaction not completed, result not returned

## How this service works

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

## Output

A numeric value representing the mean SoilGrids total nitrogen for the 0–5 cm soil depth layer at the requested coordinate, sourced from ISRIC SoilGrids. Coordinates outside the Latvia boundary are rejected before the 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-latvia-soil-nitrogen-0-5-cm-3e1d1e87/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)