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MCP Server: Vitamin D

Remote MCP server behind getvitamind.app. Ten tools that answer, for a real location and skin type, whether the sun can synthesize vitamin D right now.

The Problem

An assistant asked "can I get vitamin D today?" answers with the generic "15 minutes of sun" line. That answer is wrong most of the time: skin type I in London and skin type V in Madrid need completely different exposure, and above ~40° latitude there are months where synthesis is physically impossible regardless of how long you stay outside.

The Solution

A remote MCP server that puts the calculation engine behind getvitamind.app directly in the assistant. Six public tools need no account — city search, sun times, daily synthesis window, the full year, live status from real UV and cloud data, and session estimation. Four more read the user's profile, saved cities and sun history over OAuth. A published npm bridge (vitamind-mcp) covers clients that can only launch local commands.

Tags

TypeScriptnpmOAuthRemote MCP

Outcomes

  • 10 tools; the six public ones need no API key or account
  • Hosted transport plus an npm stdio bridge for local-only clients
  • Answers computed from NOAA solar geometry, Madronich UV and Holick synthesis models — not a lookup table