# Saylor Innovations Data Desk – Moon Phase & Rise/Set

> Saylor Innovations Data Desk – Moon Phase & Rise/Set is a paid API for AI agents from saylorinnovations.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-30).

Returns moon phase name, phase angle, illumination percentage, moonrise/moonset times, and highest/lowest altitude moments for any latitude/longitude coordinate

## Facts

- Endpoint: GET https://saylorinnovations.com/api/astronomy/moon?utm_source=zero.xyz
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-30
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/saylor-innovations-data-desk-moon-phase-rise-set-bd3135c7
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_EB33pik6QiGUsLAdshmRu

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-data-desk-moon-phase-rise-set-bd3135c7
```

Example prompt: What's the moon phase, illumination percentage, and moonrise/moonset times for tonight at latitude 48.8566, longitude 2.3522 in Paris?

## When to prefer this

Choose this endpoint when you need detailed lunar data — phase name, illumination, phase angle, and precise rise/set/culmination times — for any geographic coordinate. It is especially valuable for outdoor activity planning (astrophotography, camping, fishing, hunting), agricultural scheduling, or any use case requiring both moon phase and timing data in a single call. Unlike generic astronomy APIs, it sources data from MET Norway and returns rich altitude and azimuth details alongside phase information.

## Known failure modes

- Missing required lat/lon parameters returns a validation error
- Latitude outside -90 to 90 or longitude outside -180 to 180 causes an error
- MET Norway upstream service unavailable may result in null fields or error
- Coordinates in the extreme polar regions may return null moonrise/moonset if the moon doesn't cross the horizon that day
- Invalid date format may cause unexpected or empty results

## How this service works

Moon phase name, phase angle and illumination percent plus moonrise, moonset, highest and lowest points for any location and date, from MET Norway

## Output

A JSON object containing: the date, named moon phase (e.g. 'waxing crescent', 'full moon'), phase angle in degrees, illumination as a percentage, moonrise and moonset times with azimuths, the moment and elevation when the moon is highest (with a visibility flag), the moment when the moon is lowest, the location coordinates, data source attribution (MET Norway), and any contextual notes.

## 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",
     "required": [
      "lat",
      "lon"
     ],
     "properties": {
      "lat": {
       "type": "string",
       "description": "Latitude -90 to 90"
      },
      "lon": {
       "type": "string",
       "description": "Longitude -180 to 180"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "json"
    },
    "example": {
     "type": "object",
     "required": [
      "date",
      "phase",
      "illumination_percent"
     ],
     "properties": {
      "date": {
       "type": "string",
       "description": "Date (YYYY-MM-DD)"
      },
      "note": {
       "type": "string",
       "description": "Caveat or context for reading the result"
      },
      "phase": {
       "type": [
        "string",
        "null"
       ],
       "description": "Named phase such as waxing crescent or full moon"
      },
      "lowest": {
       "type": [
        "object",
        "null"
       ],
       "description": "Moment and altitude when the moon is lowest"
      },
      "source": {
       "type": "string",
       "description": "Data source the values come from"
      },
      "highest": {
       "type": [
        "object",
        "null"
       ],
       "properties": {
        "time": {
         "type": [
          "string",
          "null"
         ],
         "description": "Time"
        },
        "visible": {
         "type": [
          "boolean",
          "null"
         ],
         "description": "True when the moon is above the horizon at its highest point"
        },
        "elevation_deg": {
         "type": [
          "number",
          "null"
         ],
         "description": "Elevation, in degrees"
        }
       },
       "description": "Moment and altitude when the moon is highest"
      },
      "moonset": {
       "type": [
        "object",
        "null"
       ],
       "description": "Moonset time with azimuth"
      },
      "location": {
       "type": "objec
… (truncated)
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/saylor-innovations-data-desk-moon-phase-rise-set-bd3135c7/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)