# HALOWERK Baltic Land – Lithuania Maximum Slope

> HALOWERK Baltic Land – Lithuania Maximum Slope is a paid API for AI agents from baltikum.halowerk.com, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-14).

Returns the maximum adjacent-cell surface gradient (steepest slope) at a given coordinate within Lithuania, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://baltikum.halowerk.com/v1/lt-max-slope
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-baltic-land-lithuania-maximum-slope-cfdcad36
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_7stS8GndhbAOc_FKkyhYu

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-maximum-slope-cfdcad36 -d '<json body>'
```

Example prompt: What's the maximum surface slope at latitude 54.6872, longitude 25.2797 in Lithuania? I need the steepest adjacent-cell gradient for that coordinate.

## When to prefer this

Use this endpoint when you need point-level maximum slope data specifically within Lithuania and require pre-payment boundary validation to avoid charges for out-of-scope queries. It is ideal for land analysis, site assessment, or environmental modeling workflows scoped to Lithuanian territory, and complements sibling endpoints for soil properties, land cover, and terrain ruggedness on the same platform.

## Known failure modes

- Coordinate outside Lithuania boundary — rejected pre-payment with validation error
- Latitude or longitude outside European coverage range (lat 34–72.5, lon -31.5–40.5) — schema validation failure
- Invalid coordinate format or missing required fields — request rejected
- Network timeout or service unavailability — no result returned

## How this service works

Maximum adjacent-cell surface gradient across the analysis grid. The coordinate is validated against the Natural Earth boundary for Lithuania; results outside it are rejected before payment.

## Output

A numeric value representing the maximum adjacent-cell surface gradient (steepest slope) at the queried coordinate within Lithuania. Coordinates outside the Lithuanian boundary (validated against Natural Earth) are rejected before payment is processed.

## 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-maximum-slope-cfdcad36/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)