# HALOWERK Land Compare – Topsoil Sand Two-Point Comparison

> HALOWERK Land Compare – Topsoil Sand Two-Point Comparison is a paid API for AI agents from landvergleich.halowerk.com, paid per call via x402, $0.006/call, status unknown (last checked 2026-09-15).

Measures topsoil sand content for exactly two European coordinates and returns the signed difference and which location has higher sand content.

## Facts

- Endpoint: POST https://landvergleich.halowerk.com/v1/compare-two-soil-sand
- 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-land-compare-topsoil-sand-two-point-comparison-beb5dd8f
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vkj4o5y37SQKmsuROJD4J

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-land-compare-topsoil-sand-two-point-comparison-beb5dd8f -d '<json body>'
```

Example prompt: Compare the topsoil sand content between my two fields — one near Paris at 48.8566° N, 2.3522° E and another near Berlin at 52.5200° N, 13.4050° E — and tell me which has sandier soil and by how much.

## When to prefer this

Choose this endpoint when you need a direct, pairwise topsoil sand comparison for exactly two European locations in a single call. It is purpose-built for binary land comparisons with a clear winner signal, making it ideal for site selection, agricultural planning, and land quality assessments within European geographic bounds. Use the multi-site ranking sibling endpoint if you need to compare more than two locations simultaneously.

## Known failure modes

- Coordinates outside the European coverage bounds (lat 34–72.5, lon -31.5–40.5) will be rejected
- Providing fewer or more than exactly two locations returns a validation error
- Invalid latitude/longitude values trigger schema validation failure
- Network timeouts or upstream soil dataset unavailability may return a 5xx error

## How this service works

Measures topsoil sand for exactly two European coordinates with one method and reports the signed difference and winner where meaningful.

## Output

Returns the measured topsoil sand value for each of the two input European coordinates, the signed numerical difference between them, and an indication of which location has the higher sand content (the 'winner') where the difference is meaningful.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "locations": {
   "type": "array",
   "items": {
    "type": "object",
    "required": [
     "longitude",
     "latitude"
    ],
    "properties": {
     "name": {
      "type": "string",
      "maxLength": 60,
      "minLength": 1
     },
     "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."
     }
    },
    "additionalProperties": false
   },
   "maxItems": 2,
   "minItems": 2
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/halowerk-land-compare-topsoil-sand-two-point-comparison-beb5dd8f/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from landvergleich.halowerk.com](https://www.zero.xyz/host/landvergleich.halowerk.com/llms.txt)