# HALOWERK Southern Land Portugal Soil pH Lookup

> HALOWERK Southern Land Portugal Soil pH Lookup is a paid API for AI agents from suedland.halowerk.com, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-15).

Returns the mean SoilGrids pH (H2O) for the 0–5 cm topsoil layer at a given coordinate within Portugal, validated against Natural Earth boundaries.

## Facts

- Endpoint: POST https://suedland.halowerk.com/v1/pt-soil-ph
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/halowerk-southern-land-portugal-soil-ph-lookup-9e293cbb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mki4xhem89R8z3BrYoUea

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-southern-land-portugal-soil-ph-lookup-9e293cbb -d '<json body>'
```

Example prompt: What's the mean soil pH in the top 5 cm at latitude 38.72, longitude -9.14 in Portugal? I need the SoilGrids H2O pH reading for that spot.

## When to prefer this

Use this endpoint when you need a precise, pay-per-call soil pH reading for a specific coordinate within Portugal and want boundary-validated data sourced from SoilGrids. Prefer it over general geospatial APIs when the specific variable needed is topsoil pH (H2O, 0–5 cm) and the location is in Portugal. It is ideal for agricultural planning, land assessment, and environmental monitoring workflows where per-point soil chemistry data is required.

## Known failure modes

- Coordinate outside Portugal's Natural Earth boundary — request rejected before payment is processed
- Latitude or longitude out of the accepted European coverage range (lat 34–72.5, lon -31.5–40.5) — validation error
- Invalid or missing latitude/longitude fields — schema validation failure
- Network or upstream SoilGrids data unavailability — service error

## How this service works

Mean SoilGrids pH in H2O for the 0-5 cm layer. The coordinate is validated against the Natural Earth boundary for Portugal; results outside it are rejected before payment.

## Output

A numeric mean soil pH value (measured in H2O) for the 0–5 cm topsoil layer at the specified coordinate, derived from SoilGrids data. The coordinate is validated against Portugal's Natural Earth boundary before the result is returned; coordinates outside Portugal are rejected.

## 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-southern-land-portugal-soil-ph-lookup-9e293cbb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from suedland.halowerk.com](https://www.zero.xyz/host/suedland.halowerk.com/llms.txt)