# HALOWERK Baltic Land – Latvia Soil Cation Exchange Capacity (0-5 cm)

> HALOWERK Baltic Land – Latvia Soil Cation Exchange Capacity (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 cation exchange capacity (CEC) for the 0–5 cm topsoil layer at a given WGS84 coordinate validated within Latvia's boundary.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lv-soil-cec
- 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-cation-exchange-capacity-0-5-cm-e5738bc1
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_JtVj-qsCRAyU5kICWJF7F

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-cation-exchange-capacity-0-5-cm-e5738bc1 -d '<json body>'
```

Example prompt: What's the SoilGrids cation exchange capacity for the topsoil at latitude 56.946, longitude 24.105 in Latvia?

## When to prefer this

Choose this endpoint when you need SoilGrids-derived cation exchange capacity data specifically for a point location within Latvia. It is ideal for soil science workflows, agricultural suitability analysis, or environmental surveys requiring verified topsoil nutrient retention data for Latvian coordinates. It differs from broader European soil APIs in that it enforces Latvia-specific boundary validation before billing.

## Known failure modes

- Coordinate outside Latvia boundary — request rejected before payment, returns validation error
- Coordinate within European coverage range but outside Latvia — rejected by country boundary check
- Missing or malformed latitude/longitude — returns schema validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — rejected
- Service unavailable or SoilGrids data not accessible — may return 5xx error

## How this service works

Mean SoilGrids cation exchange capacity 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 mean cation exchange capacity (CEC) value for the 0–5 cm topsoil layer at the queried coordinate, sourced from SoilGrids. Coordinates outside Latvia'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-latvia-soil-cation-exchange-capacity-0-5-cm-e5738bc1/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)