# HALOWERK Southern Land – Greece Soil Organic Carbon (0-5 cm)

> HALOWERK Southern Land – Greece Soil Organic Carbon (0-5 cm) is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-13).

Returns the mean SoilGrids soil organic carbon value for the 0-5 cm depth layer at a given coordinate within Greece.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/gr-soil-organic-carbon
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-southern-land-greece-soil-organic-carbon-0-5-cm-46f2592d
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_ydMUUeu12PdzgFa31bBzm

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-southern-land-greece-soil-organic-carbon-0-5-cm-46f2592d -d '<json body>'
```

Example prompt: What's the mean soil organic carbon in the top 5 centimeters at latitude 37.98 and longitude 23.73 in Greece?

## When to prefer this

Choose this endpoint when you need point-level soil organic carbon data specifically for locations within Greece, backed by SoilGrids global soil models, with built-in boundary validation to ensure you only pay for valid Greek coordinates. Prefer this over generic SoilGrids API calls when you need a pre-validated, pay-per-call microservice with no setup overhead.

## Known failure modes

- Coordinate outside Greece boundary — rejected before payment with a validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Coordinate technically in European range but outside Greece polygon — rejected with boundary error
- Network or upstream SoilGrids data unavailability — service error response

## How this service works

Mean SoilGrids organic carbon for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Greece; results outside it are rejected before payment.

## Output

A numeric value representing the mean soil organic carbon concentration in the 0-5 cm depth layer at the queried coordinate, sourced from SoilGrids global soil data, validated to fall within the Natural Earth boundary of Greece.

## 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-southern-land-greece-soil-organic-carbon-0-5-cm-46f2592d/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)