# HALOWERK Atlantic Land – France Soil pH (0-5 cm)

> HALOWERK Atlantic Land – France Soil pH (0-5 cm) is a paid API for AI agents from atlantikland.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 coordinate within France, validated against the Natural Earth France boundary.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/fr-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-atlantic-land-france-soil-ph-0-5-cm-dd688c9c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_lpUmGxSNt2oYmCkkm5qGE

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-atlantic-land-france-soil-ph-0-5-cm-dd688c9c -d '<json body>'
```

Example prompt: What's the SoilGrids pH of the topsoil (0-5 cm layer) at latitude 47.21 and longitude 2.35 in France? I need the mean H2O pH for that surface layer.

## When to prefer this

Choose this endpoint when you need soil pH data specifically for locations within France and want SoilGrids-derived mean pH values for the surface layer (0-5 cm). It is particularly suited for precision agriculture, land valuation, environmental baseline studies, and viticulture suitability assessments within French territory. It bundles geographic validation (boundary check) so you don't need to pre-filter coordinates yourself.

## Known failure modes

- Coordinate outside France boundary — rejected before payment with a geographic validation error
- Latitude or longitude out of published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Invalid or missing coordinate fields — request rejected with input validation error
- SoilGrids data unavailable for sparse or coastal edge cells — may return null or no-data response

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

## Output

Returns the mean SoilGrids pH in H2O value for the 0-5 cm soil depth layer at the specified coordinate. The coordinate is validated against the Natural Earth France boundary; requests with coordinates outside France are rejected before 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-atlantic-land-france-soil-ph-0-5-cm-dd688c9c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from atlantikland.halowerk.com](https://www.zero.xyz/host/atlantikland.halowerk.com/llms.txt)