D Fetcher

com.dfetcher/vitamin-d

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

healthy

status

tools exposed

2077ms

connect latency

39afc8be0d4a

schema fingerprint

Tools (3)

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.

Endpoint

https://dfetcher.com/mcp
Category: Dev & Git · Last checked: 2026-08-15T09:03:16Z

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What this means. This server responded to the MCP handshake and listed its tools without authentication. The schema fingerprint lets us flag if tool signatures silently change (schema drift) between checks.