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

> HALOWERK Baltic Land – Latvia Soil Organic Carbon (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 organic carbon content for the 0-5 cm topsoil layer at a given coordinate within Latvia, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lv-soil-organic-carbon
- 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-organic-carbon-0-5-cm-68581a4d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FOVbWvAx4V8smZmBHwIdc

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-organic-carbon-0-5-cm-68581a4d -d '<json body>'
```

Example prompt: What's the mean soil organic carbon content in the top 5 cm at latitude 56.946 and longitude 24.105 in Latvia?

## When to prefer this

Choose this endpoint when you need SoilGrids topsoil organic carbon specifically for a point within Latvia and want built-in boundary validation so out-of-country calls are rejected without billing. Prefer it over generic SoilGrids APIs when operating in a pay-per-call agent pipeline and Latvia is your confirmed target region.

## Known failure modes

- Coordinate outside Latvia boundary — rejected before payment with a validation error
- Coordinate within European coverage bounding box but outside Latvia polygon — rejected
- Latitude or longitude out of European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- No SoilGrids data available for the exact coordinate — may return null or no-data response
- Malformed request body — missing required latitude or longitude fields

## How this service works

Mean SoilGrids organic carbon 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 soil organic carbon content (g/kg or dg/kg, as per SoilGrids conventions) for the 0-5 cm depth layer at the requested coordinate. The coordinate is pre-validated against Latvia's Natural Earth boundary; requests outside Latvia are rejected before any payment is charged.

## 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-organic-carbon-0-5-cm-68581a4d/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)