# HALOWERK Baltic Land – SoilGrids pH (0–5 cm) for Germany

> HALOWERK Baltic Land – SoilGrids pH (0–5 cm) for Germany 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 pH in H₂O for the 0–5 cm soil layer at a given WGS84 coordinate within Germany.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/de-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-soilgrids-ph-0-5-cm-for-germany-4a770298
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_5j-EX5zN6uvjJf4b5ALoO

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-soilgrids-ph-0-5-cm-for-germany-4a770298 -d '<json body>'
```

Example prompt: What's the mean SoilGrids pH in H₂O for the top 0–5 cm of soil at latitude 51.5 and longitude 11.9 in Germany?

## When to prefer this

Choose this endpoint when you need point-level topsoil pH data specifically for locations within Germany, validated against the official German boundary, backed by the SoilGrids dataset. It is ideal when soil acidity is the specific variable of interest at the 0–5 cm depth. Prefer it over raw SoilGrids API calls when you want pre-validated, pay-per-query access with automatic boundary enforcement.

## Known failure modes

- Coordinate outside Germany boundary — rejected before payment with a boundary validation error
- Coordinate outside the published European coverage range (lat 34–72.5, lon −31.5–40.5) — schema validation error
- Malformed or missing latitude/longitude — request rejected with input validation error
- SoilGrids upstream data unavailable for the exact coordinate — may return null or no-data value

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

## Output

A numeric mean pH value (H₂O method) for the 0–5 cm soil depth at the queried coordinate, sourced from the SoilGrids dataset. The coordinate is first validated against the German boundary; requests outside Germany 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-soilgrids-ph-0-5-cm-for-germany-4a770298/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)