# HALOWERK Europe Land – Soil pH 1000m Buffer

> HALOWERK Europe Land – Soil pH 1000m Buffer is a paid API for AI agents from euroland.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids pH in H2O for the 0–5 cm soil layer within a 1,000-metre circular neighbourhood around a given European coordinate.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-soil-ph-buffer-1000m
- Price: $0.006/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-europe-land-soil-ph-1000m-buffer-4f04d74b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_9TcpQ9xjP3qS8DjjQFLE6

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-europe-land-soil-ph-1000m-buffer-4f04d74b -d '<json body>'
```

Example prompt: What's the mean topsoil pH in a 1-kilometre radius around latitude 51.5 and longitude -0.1 in Europe? I need the SoilGrids H2O reading for the 0–5 cm layer.

## When to prefer this

Choose this endpoint when you need a spatially smoothed, representative topsoil pH estimate for a point location in Europe with a 1-km neighbourhood buffer — ideal when local variability should be averaged out. Prefer this over the 60m or polygon variants when working with a single coordinate and wanting broader spatial context. Use instead of a global soil API when coverage is specifically European and SoilGrids standardization is required.

## Known failure modes

- Coordinate outside European coverage bounds (latitude 34–72.5, longitude -31.5–40.5) returns an error or no data
- Invalid or missing latitude/longitude fields cause a 4xx validation error
- Payment failure (x402 protocol) prevents response
- Coordinates over ocean or non-land areas may return null or no valid soil data
- Server-side SoilGrids data unavailability could cause 5xx errors

## How this service works

Mean SoilGrids pH in H2O for the 0-5 cm layer. The service evaluates a circular 1,000 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A standardized mean soil pH value (pH in H2O scale) for the 0–5 cm topsoil layer, aggregated across all SoilGrids pixels within a 1,000-metre circular buffer around the supplied coordinate, covering any of the 30 European countries in the dataset.

## 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-europe-land-soil-ph-1000m-buffer-4f04d74b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from euroland.halowerk.com](https://www.zero.xyz/host/euroland.halowerk.com/llms.txt)