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Vitamin D synthesis calculator: sun position, UV, IU/min, time to dose, sunburn risk, daily window.
D Fetcher is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 67/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding D Fetcher to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
mcp add com.dfetcher/vitamin-d https://dfetcher.com/mcpReview the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-05-29T19:13:29.874948Z",
"publishedAt": "2026-05-29T19:13:29.874948Z",
"statusChangedAt": "2026-05-29T19:13:29.874948Z"
}
},
"server": {
"name": "com.dfetcher/vitamin-d",
"title": "D Fetcher",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://dfetcher.com/mcp",
"type": "streamable-http"
}
],
"version": "1.0.0",
"repository": {
"url": "https://github.com/rgrieselhuber/dfetcher",
"source": "github"
},
"websiteUrl": "https://dfetcher.com",
"description": "Vitamin D synthesis calculator: sun position, UV, IU/min, time to dose, sunburn risk, daily window."
}
}