# Saylor Innovations Planets Visible Tonight

> Saylor Innovations Planets Visible Tonight is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-01).

Returns which planets are visible tonight from a given location, including best viewing time, maximum altitude, compass direction, hours above 10°, and elongation from the Sun.

## Facts

- Endpoint: GET https://saylorinnovations.com/api/sky/planets?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-01
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-planets-visible-tonight-ed0d3113
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_XtbUkiaSk5nsuI4l00wHB

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 saylor-innovations-planets-visible-tonight-ed0d3113
```

Example prompt: What planets can I see tonight from Austin, Texas — I want to know the best time to look, which direction to face, and how high they'll get above the horizon.

## When to prefer this

Use this endpoint when you need real-time, location-specific planetary visibility data for any night, especially when you need computed details like altitude, azimuth, viewing window hours, and solar elongation in a single call. Prefer this over generic astronomy APIs when you need actionable observing guidance (best time, compass direction) rather than raw ephemeris data.

## Known failure modes

- Missing or invalid latitude/longitude returns an error or empty planet list
- Coordinates outside valid range (-90 to 90 lat, -180 to 180 lon) may cause computation errors
- If no planets are visible tonight from the location, visible_count may be 0 with an empty array
- Network or payment failure (x402) may prevent the response from being returned

## How this service works

Planets Visible Tonight (times, altitude, direction) — Science

## Output

Returns an array of planet objects each containing the planet's name, best viewing time, maximum altitude in degrees, compass direction, number of hours it will be above 10 degrees, and its elongation from the Sun. Also includes a count of how many planets are visible tonight.

## 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",
      "POST",
      "PUT",
      "PATCH",
      "DELETE",
      "HEAD"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "lat": {
       "type": "string",
       "description": "latitude (query)"
      },
      "lon": {
       "type": "string",
       "description": "longitude (query)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "planets"
     ],
     "properties": {
      "planets": {
       "type": "array",
       "items": {
        "type": "object"
       }
      },
      "visible_count": {
       "type": "number"
      }
     }
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-planets-visible-tonight-ed0d3113/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from saylorinnovations.com](https://www.zero.xyz/host/saylorinnovations.com/llms.txt)