# HALOWERK Nordic Land – Finland Soil Cation Exchange Capacity (0-5 cm)

> HALOWERK Nordic Land – Finland Soil Cation Exchange Capacity (0-5 cm) is a paid API for AI agents from nordland.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 coordinate within Finland.

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/fi-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-nordic-land-finland-soil-cation-exchange-capacity-0-5-cm-e2d7cd73
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EgXP1Xym_kz9QXGXaJfcu

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-nordic-land-finland-soil-cation-exchange-capacity-0-5-cm-e2d7cd73 -d '<json body>'
```

Example prompt: What's the mean cation exchange capacity of the topsoil at latitude 60.1699, longitude 24.9384 in Finland? I need the 0-5 cm SoilGrids CEC value for that point.

## When to prefer this

Use this endpoint when you need a single, authoritative mean CEC value for a specific point location within Finland's borders at the 0-5 cm depth, sourced from the standardised SoilGrids dataset. Prefer it over generic soil APIs when Finnish boundary validation and SoilGrids data provenance are required, or when integrating with other HALOWERK Nordic Land sibling endpoints (pH, organic carbon, texture) for a multi-attribute soil profile.

## Known failure modes

- Coordinate outside Finland boundary — request rejected before payment with a boundary validation error
- Latitude or longitude outside the declared European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Missing or malformed latitude/longitude — 400-level error
- Service unavailability or upstream SoilGrids data gap — 5xx error or null result

## 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 Finland; results outside it are rejected before payment.

## Output

A numeric value representing the mean cation exchange capacity (CEC) of the 0-5 cm topsoil layer at the queried coordinate, derived from SoilGrids data, expressed in cmolc/kg. The coordinate is validated against Finland's boundary before payment is charged; coordinates outside Finland are rejected.

## 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-nordic-land-finland-soil-cation-exchange-capacity-0-5-cm-e2d7cd73/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from nordland.halowerk.com](https://www.zero.xyz/host/nordland.halowerk.com/llms.txt)