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

> HALOWERK Atlantic Land – France Soil Organic Carbon (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 organic carbon concentration for the 0-5 cm topsoil layer at a given WGS84 coordinate within France, validated against the Natural Earth boundary.

## Facts

- Endpoint: POST https://atlantikland.halowerk.com/v1/fr-soil-organic-carbon
- 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-organic-carbon-0-5-cm-4f022f42
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qIUSjv-3umUSkJlDwLHtu

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-organic-carbon-0-5-cm-4f022f42 -d '<json body>'
```

Example prompt: What's the mean soil organic carbon concentration in the top 5 cm at latitude 44.8 and longitude 0.57 in France? I need the SoilGrids value for that coordinate.

## When to prefer this

Choose this endpoint when you need authoritative SoilGrids topsoil organic carbon data specifically for a point location within France, especially for agricultural assessments, environmental reporting, or land valuation workflows that require boundary-validated, pay-per-call access without managing SoilGrids API credentials directly.

## Known failure modes

- Coordinate outside France boundary — rejected pre-payment with a boundary validation error
- Latitude or longitude out of the European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- SoilGrids data unavailable for the given location (e.g. water body or missing tile) — may return null or error response
- Malformed request body — missing required latitude or longitude fields

## How this service works

Mean SoilGrids organic carbon 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 organic carbon value (likely in g/kg or dg/kg units) for the 0-5 cm soil depth at the queried coordinate. Coordinates outside the Natural Earth boundary for France 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-atlantic-land-france-soil-organic-carbon-0-5-cm-4f022f42/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)