# Orthogonal Solar Radiation Hourly API

> Orthogonal Solar Radiation Hourly API is a paid API for AI agents from x402.orthogonal.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-16).

Returns hourly downward short-wave solar radiation flux (W/m²) for one or more geographic coordinates over a specified date range

## Facts

- Endpoint: GET https://x402.orthogonal.com/precip/api/v1/solar-radiation-hourly
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-16
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/orthogonal-solar-radiation-hourly-api-6f0b4ff9
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Vh_FACprR0jhr4Mlsczvs

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-solar-radiation-hourly-api-6f0b4ff9
```

Example prompt: Can you get me the hourly solar radiation flux in W/m² for San Francisco (37.7575, -122.42616) from October 15 to October 31, 2025, in the America/Los_Angeles timezone, returned as JSON?

## When to prefer this

Choose this endpoint when you need hourly-resolution solar radiation (shortwave flux) data for specific geographic coordinates, especially for solar energy planning, agricultural light modeling, or climate analysis. It supports multiple coordinates in a single call and flexible output formats (JSON, GeoJSON, CSV), making it suitable for both single-site and multi-site analysis. Prefer this over general weather APIs when W/m² solar irradiance is the primary quantity needed.

## Known failure modes

- Missing or malformed latitude/longitude coordinates returns a validation error
- Mismatched number of latitude and longitude values causes a bad request error
- Invalid date format or out-of-range dates may return empty or error responses
- Unsupported IANA timezone string returns an error
- Invalid format parameter (not json/geojson/csv) returns a bad request
- Payment failure or insufficient USDC balance returns a 402 Payment Required error

## How this service works

Hourly downward short-wave radiation flux in watts per square meter (W/m²) | ERROR: Unable to calculate price.

## Output

Returns a time series of hourly downward short-wave radiation flux values in watts per square meter (W/m²) for each requested coordinate pair, across the specified date range. Output is available in JSON, GeoJSON, or CSV format, with timestamps localized to the requested IANA 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": "2025-10-31",
       "example": "2025-10-31"
      },
      "start": {
       "type": "string",
       "default": "2025-10-15",
       "example": "2025-10-15"
      },
      "format": {
       "type": "string",
       "default": "json",
       "description": "Output format: `geojson`, `json` or `csv`"
      },
      "latitude": {
       "type": "string",
       "default": "37.75750,42.35355,29.97991",
       "example": "37.75750,42.35355,29.97991",
       "description": "Comma-separated list of latitude coordinates (WGS84)"
      },
      "longitude": {
       "type": "string",
       "default": "-122.42616,-71.06053,-90.07447",
       "example": "-122.42616,-71.06053,-90.07447",
       "description": "Comma-separated list of longitude coordinates (WGS84)"
      },
      "timeZoneId": {
       "type": "string",
       "default": "America/Chicago",
       "example": "America/Chicago",
       "description": "IANA timezone identifier for localizing timestamps"
      }
     }
    }
   },
   "additionalProperties": false
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/orthogonal-solar-radiation-hourly-api-6f0b4ff9/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)