# HALOWERK Europe Land – Drainage Tendency (250 m Buffer)

> HALOWERK Europe Land – Drainage Tendency (250 m 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 a standardized relative runoff tendency score derived from terrain slope and ruggedness for a 250-metre circular neighbourhood around a given European coordinate.

## Facts

- Endpoint: POST https://euroland.halowerk.com/v1/europe-drainage-tendency-buffer-250m
- 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-drainage-tendency-250-m-buffer-7661d2f2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_rykkNhTXEDwgh9ub_dlB-

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-drainage-tendency-250-m-buffer-7661d2f2 -d '<json body>'
```

Example prompt: What's the relative drainage and runoff tendency for the land at 48.8566° N, 2.3522° E — using terrain slope and ruggedness within a 250-metre radius?

## When to prefer this

Use this endpoint when you need a fast, standardized, point-level terrain drainage or runoff tendency score for any of 30 European countries, especially for land suitability, construction risk, agricultural assessment, or ecological analysis workflows. Prefer this over larger-buffer or polygon variants when a 250-metre neighbourhood is the appropriate spatial scale for the analysis.

## Known failure modes

- Coordinates outside the European coverage bounds (lat 34–72.5, lon -31.5–40.5) return an error
- Invalid or missing latitude/longitude returns a validation error
- Coordinates in the sea or outside land coverage may return null or out-of-range results
- Service unavailability returns a non-200 HTTP status with error detail
- Payment failure via x402 protocol blocks the request before computation

## How this service works

Relative runoff tendency derived from slope and ruggedness. The service evaluates a circular 250 metre neighborhood around one coordinate and returns standardized units across all 30 covered countries.

## Output

A standardized numerical score representing the relative runoff/drainage tendency derived from terrain slope and ruggedness within a 250-metre circular area around the supplied European coordinate. The score is comparable across all 30 covered European countries.

## 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-drainage-tendency-250-m-buffer-7661d2f2/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)