# Orthogonal Hourly Soil Moisture API

> Orthogonal Hourly Soil Moisture API is a paid API for AI agents from x402.orthogonal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).

Returns hourly soil moisture percentage relative to field holding capacity at 0-10cm depth for one or more geographic coordinates over a specified date range.

## Facts

- Endpoint: GET https://x402.orthogonal.com/precip/api/v1/soil-moisture-hourly
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orthogonal-hourly-soil-moisture-api-348be335
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_URf8ghLqe77v3Bm1n_fm2

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 orthogonal-hourly-soil-moisture-api-348be335
```

Example prompt: Can you pull hourly soil moisture data at 0-10cm depth for my fields near San Francisco (37.7575, -122.42616) and Chicago (41.8781, -87.6298) from June 1 to June 30, 2025, using the America/Chicago timezone?

## When to prefer this

Choose this endpoint when you need high-resolution (hourly) surface-level soil moisture data (0-10cm) at specific geographic coordinates, especially for agricultural planning, irrigation scheduling, or environmental monitoring. It supports bulk queries across multiple coordinate pairs in a single call, making it efficient for multi-site monitoring. Prefer this over weather APIs when soil-specific hydrological data is the primary requirement rather than atmospheric conditions.

## Known failure modes

- Missing or invalid latitude/longitude coordinates returns an error
- Date range outside available historical data may return empty or partial results
- Invalid timezone ID causes parsing or alignment errors
- Coordinates over open ocean or unsupported regions may return null or missing values
- Malformed date format (not YYYY-MM-DD) causes request rejection
- Payment failure results in 402 response blocking data access

## How this service works

Hourly soil moisture percentage relative to holding capacity at 0-10cm depth | ERROR: Unable to calculate price.

## Output

Returns a time series of hourly soil moisture readings expressed as a percentage relative to field holding capacity at the 0-10cm depth layer, for each requested coordinate pair over the specified date range. Data is returned in JSON format (or optionally another format) with timestamps aligned to the requested timezone.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "end": {
       "type": "string",
       "default": "2025-06-30",
       "example": "2025-06-30"
      },
      "start": {
       "type": "string",
       "default": "2025-06-01",
       "example": "2025-06-01"
      },
      "format": {
       "type": "string",
       "default": "json"
      },
      "latitude": {
       "type": "string",
       "default": "37.75750,42.35355,29.97991",
       "example": "37.75750,42.35355,29.97991"
      },
      "longitude": {
       "type": "string",
       "default": "-122.42616,-71.06053,-90.07447",
       "example": "-122.42616,-71.06053,-90.07447"
      },
      "timeZoneId": {
       "type": "string",
       "default": "America/Chicago"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orthogonal-hourly-soil-moisture-api-348be335/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402.orthogonal.com](https://www.zero.xyz/host/x402.orthogonal.com/llms.txt)