# HALOWERK Land Dossiers – Housing Terrain-First Screening

> HALOWERK Land Dossiers – Housing Terrain-First Screening is a paid API for AI agents from landdossier.halowerk.com, paid per call via x402, $0.012/call, status unknown (last checked 2026-09-15).

Generates a deterministic terrain-priority decision-support dossier for housing land screening using six disclosed measurements and an evidence score.

## Facts

- Endpoint: POST https://landdossier.halowerk.com/v1/dossier-housing-terrain-first
- Price: $0.012/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-dossiers-housing-terrain-first-screening-d4036cbb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_svlwKeaICB4MdIdUrmbOJ

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-dossiers-housing-terrain-first-screening-d4036cbb -d '<json body>'
```

Example prompt: Can you run a housing land terrain screening dossier for coordinates 51.5074° N, -0.1278° E with a 500-metre radius and tell me the terrain-priority evidence score and the six disclosed measurements?

## When to prefer this

Use this endpoint when you need a fast, deterministic, terrain-first evidence score for a housing land site in Europe and want six specific disclosed measurements as screening input before commissioning expensive surveys, planning applications, or legal due diligence. Prefer this over generic GIS lookups when you need a structured decision-support dossier specifically calibrated for residential/housing development suitability.

## Known failure modes

- Coordinates outside European coverage range (lat 34–72.5, lon -31.5–40.5) return a validation or out-of-coverage error
- radius_m below 50 or above 2000 returns a validation error
- Malformed or missing latitude/longitude returns a 400-level error
- Payment failure via x402 protocol results in a 402 response with no dossier data

## How this service works

Decision-support dossier for housing land screening using six disclosed measurements and a deterministic terrain-priority evidence score. It is screening evidence, not a permit, valuation or legal determination.

## Output

Returns a structured decision-support dossier containing six disclosed terrain measurements and a deterministic terrain-priority evidence score for the specified location and radius. The dossier is intended as screening evidence only — not a permit, legal determination, or property valuation.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "latitude": {
   "type": "number",
   "maximum": 72.5,
   "minimum": 34,
   "description": "WGS84 latitude inside the published European coverage."
  },
  "radius_m": {
   "type": "integer",
   "default": 250,
   "maximum": 2000,
   "minimum": 50
  },
  "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-land-dossiers-housing-terrain-first-screening-d4036cbb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from landdossier.halowerk.com](https://www.zero.xyz/host/landdossier.halowerk.com/llms.txt)