# HALOWERK Nordic Land – Finland Soil pH (0-5 cm)

> HALOWERK Nordic Land – Finland Soil pH (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 mean SoilGrids pH in H2O for the 0-5 cm topsoil layer at a given coordinate within Finland

## Facts

- Endpoint: POST https://nordland.halowerk.com/v1/fi-soil-ph
- 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-ph-0-5-cm-5dfd0cf4
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eQfJzt7l9Th52Q9ANADGa

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-ph-0-5-cm-5dfd0cf4 -d '<json body>'
```

Example prompt: What's the mean soil pH in the top 5 centimeters at latitude 61.9241, longitude 25.7482 in Finland?

## When to prefer this

Choose this endpoint when you need topsoil pH specifically for a point within Finland, validated against official Finnish boundaries. It is preferable over generic soil APIs when you need boundary-enforced Finnish coverage, SoilGrids-sourced data at the 0-5 cm depth, and per-call micropayment pricing via x402. Use sibling endpoints on the same host for complementary soil properties (clay, sand, silt, organic carbon) at the same location.

## Known failure modes

- Coordinate outside Finland's Natural Earth boundary — request rejected with validation error before payment
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- No data available for the specific coordinate (e.g. water bodies, urban areas with no soil data) — null or error response
- Network timeout or service unavailability — connection error
- Malformed input (non-numeric coordinates) — schema validation error

## How this service works

Mean SoilGrids pH in H2O 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

Returns the mean SoilGrids pH measured in water (H2O) for the 0-5 cm topsoil layer at the queried coordinate. The value represents soil acidity/alkalinity on the standard pH scale. Requests with coordinates outside Finland's Natural Earth boundary are rejected before any charge is incurred.

## 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-ph-0-5-cm-5dfd0cf4/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)