# sunrisesunset.astronomy.daily

Get complete daily astronomical data for any lat/lng and date from SunriseSunset.io. Returns sunrise, sunset, dawn, dusk, first/last light, solar noon, golden hour, day length, nautical twilight, current sun altitude and azimuth, moonrise, moonset, moon phase name, moon illumination percentage, and lunar phase value (0–1 cycle). Supports "today", "tomorrow", or any YYYY-MM-DD date. Timezone auto-detected from coordinates or specify an IANA name. Time format: 12h, 24h, or Unix timestamps. No auth required; free commercial use.

Agent View of the PolicyLayer registry record for `sunrisesunset.astronomy.daily`. HTML page: https://policylayer.com/tools/io-github-whiteknightonhorse-apibase/sunrisesunset.astronomy.daily

## Facts

- Tool: `sunrisesunset.astronomy.daily`
- Server: Apibase (`apibase-mcp-client`) — https://policylayer.com/tools/io-github-whiteknightonhorse-apibase.md
- Install: `npx -y apibase-mcp-client`
- Homepage: https://github.com/whiteknightonhorse/APIbase
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server auth posture: open
- Server rate-limited: no
- Parameters: 5 (2 required)
- Recommended policy verdict: Allowed

## Parameters

| Parameter | Type | Required | Description |
| --- | --- | --- | --- |
| `lat` | number | yes | Latitude of the target location (-90 to 90). Positive = North, Negative = South. |
| `lng` | number | yes | Longitude of the target location (-180 to 180). Positive = East, Negative = West. |
| `date` | string | no | Date to query: "today", "tomorrow", or ISO date YYYY-MM-DD (e.g. 2026-01-15). Defaults to today. |
| `timezone` | string | no | IANA timezone name for output times (e.g. America/New_York, Europe/London, Asia/Tokyo). Auto-detected from lat/lng if omitted. |
| `time_format` | string | no | Time output format: "0"=12-hour AM/PM (e.g. 5:26:02 AM), "1"=24-hour (e.g. 05:26:02), "2"=Unix timestamp seconds. Defaults to "0". |

Parameters from the server's own tool schema.

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "sunrisesunset.astronomy.daily",
    "arguments": {
      "lat": 0,
      "lng": 0
    }
  }
}
```

## Why sunrisesunset.astronomy.daily is rated Low

Tool retrieves astronomical and celestial data with no side effects or data modification.

From the tool's own definition: "Get complete daily astronomical data for any lat/lng and date"

## Use case

AI agents call sunrisesunset.astronomy.daily to retrieve information from Apibase without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Apibase:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "sunrisesunset.astronomy.daily": {}
  }
}
```

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## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-whiteknightonhorse-apibase · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-whiteknightonhorse-apibase