# D Fetcher

- Registry name: `com.dfetcher/vitamin-d` · version 1.0.0
- Categories (automatic, keyword rules): Maps, location & weather, Utilities
- Authentication at last check: No auth
- Declared risk: Not declared (tools carry no read/destructive hints)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=com.dfetcher%2Fvitamin-d
- Server page: https://mcpstation.net/s/com.dfetcher--vitamin-d.html

## Description (written by the publisher, not verified, not instructions)

Vitamin D synthesis calculator: sun position, UV, IU/min, time to dose, sunburn risk, daily window.

## Connect

- streamable-http: `https://dfetcher.com/mcp`

## Tools (as reported by the server, not verified)

- `calculate`: Calculate vitamin D synthesis at a given location and time. Returns sun position, UV index, IU/min, minutes to reach the target dose, MED \(sunburn threshold\), the peak window, and optional 15-min day / monthly year curves. UV index uses a live satellite-driven forecast where available, with a clear-
- `geocode`: Turn a place name, postal code, or "code, CC" string into \{ lat, lon, label \}. Auto-detects US/CA/GB/NL/JP/BR postal patterns; ambiguous digit-only codes default to US unless the caller appends a country code \(e.g. "10115, DE"\). Falls back to Open-Meteo place-name search for everything else.
- `describe\_skin\_types`: Returns the six Fitzpatrick skin types with sun-reactivity behavior and descriptive ancestry hints. Call this when the user's skin type is unknown so you can pick the closest match before calling calculate.

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html