# HALOWERK Baltic Land – Lithuania Drainage Tendency

> HALOWERK Baltic Land – Lithuania Drainage Tendency is a paid API for AI agents from baltikum.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Returns the relative runoff tendency (derived from slope and terrain ruggedness) for a given coordinate within Lithuania.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lt-drainage-tendency
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-baltic-land-lithuania-drainage-tendency-bcb93c1e
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_vOwM33Lh4-BZ9iG_TE1rb

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-baltic-land-lithuania-drainage-tendency-bcb93c1e -d '<json body>'
```

Example prompt: What's the relative runoff tendency for the location at latitude 54.89, longitude 23.90 in Lithuania — I need to know how prone that terrain is to surface drainage based on slope and ruggedness.

## When to prefer this

Use this endpoint when you need a terrain-derived hydrological drainage index specifically for a point location within Lithuania and the Baltic land area. It is ideal for environmental assessments, land use planning, flood risk screening, and soil-water interaction studies where slope and ruggedness are the primary drivers. Prefer this over generic elevation APIs when you need a computed runoff tendency metric rather than raw elevation data.

## Known failure modes

- Coordinate outside Lithuania boundary — rejected before payment with a boundary validation error
- Latitude or longitude outside the published European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation error
- Malformed or missing coordinate fields — request rejected with input validation error
- Service unavailability or timeout returning no result

## How this service works

Relative runoff tendency derived from slope and ruggedness. The coordinate is validated against the Natural Earth boundary for Lithuania; results outside it are rejected before payment.

## Output

A numeric relative runoff tendency value derived from surface slope and terrain ruggedness for the specified coordinate. The result is only returned if the coordinate falls within the Lithuania boundary as validated against Natural Earth data; requests outside this boundary are rejected before any payment is charged.

## 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-baltic-land-lithuania-drainage-tendency-bcb93c1e/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from baltikum.halowerk.com](https://www.zero.xyz/host/baltikum.halowerk.com/llms.txt)