# HALOWERK Baltic Land – Estonia Soil pH (0-5 cm)

> HALOWERK Baltic Land – Estonia Soil pH (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 mean SoilGrids pH in H2O for the 0-5 cm soil layer at a given coordinate validated within Estonia's boundary.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/ee-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-baltic-land-estonia-soil-ph-0-5-cm-50c9e224
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_2GWZm8Cu9nQdqnyn8FghR

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-estonia-soil-ph-0-5-cm-50c9e224 -d '<json body>'
```

Example prompt: What's the mean soil pH in the 0-5 cm layer at latitude 58.37, longitude 26.72 in Estonia?

## When to prefer this

Choose this endpoint when you need point-level surface soil pH data specifically for Estonian locations and want a pre-validated, pay-per-query lookup that rejects out-of-boundary coordinates before charging. Prefer it over generic soil APIs when your workflow is Estonia-scoped and you want SoilGrids-sourced data without managing your own geospatial boundary checks.

## Known failure modes

- Coordinate outside Estonia's Natural Earth boundary — request rejected before payment with a validation error
- Latitude or longitude outside the published European coverage bounds (34–72.5°N, -31.5–40.5°E) — schema validation error
- Invalid or missing coordinate fields — 400-level error
- Service unavailability — 5xx 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 Estonia; results outside it are rejected before payment.

## Output

A numeric mean soil pH value (H2O method) for the 0-5 cm depth layer at the queried Estonian coordinate, sourced from SoilGrids. Coordinates outside Estonia's Natural Earth 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-estonia-soil-ph-0-5-cm-50c9e224/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)