D Fetcher
Add sun-position, UV, and vitamin D dose calculations to wellness apps or personal health agents via a dedicated MCP remote.
Overview
D Fetcher is a MCP server for the Build phase that calculates vitamin D synthesis, UV exposure, dose timing, and sunburn risk from sun-position data.
What is this MCP server?
- Vitamin D synthesis calculator with sun position and UV inputs
- Reports IU per minute, time to dose, sunburn risk, and daily window
- Streamable-http remote at https://dfetcher.com/mcp
- Open-source repo on GitHub (dfetcher), website dfetcher.com
- Registry version 1.0.0, title D Fetcher
- 1 streamable-http remote at dfetcher.com/mcp
- Publisher GitHub source: rgrieselhuber/dfetcher
What problem does it solve?
Health and outdoor app founders lack a ready-made, agent-callable sun and vitamin D model and risk shipping wrong dose math.
Who is it for?
Indie builders of wellness, fitness, or lifestyle apps who want MCP-backed sun and vitamin D calculations.
Skip if: Clinical diagnostic products, regulated medical devices, or teams that do not need sun-exposure modeling at all.
What do I get? / Deliverables
After adding the D Fetcher MCP remote, your agent can return IU rates, time-to-dose, and safe sun windows for wellness features you build.
- Agent-accessible sun and vitamin D dose estimates
- Sunburn risk and daily window outputs for UI or notifications
- Faster wellness feature iteration without custom solar math
Recommended MCP Servers
Journey fit
Wellness and quantified-self products integrate specialized calculators during Build when backend or agent tools are composed. Integrations covers hooking a niche external computation API (D Fetcher) into your app or agent flow.
How it compares
Niche health-calculation MCP API, not a general FHIR EMR integration or fitness marketplace skill.
Common Questions / FAQ
Who is D Fetcher for?
D Fetcher is for solo developers and small teams building wellness or outdoor apps who want vitamin D and UV calculations exposed to AI agents over MCP.
When should I use D Fetcher?
Use it while building features that recommend safe sun exposure, estimate IU intake from sunlight, or warn about sunburn risk based on location and time.
How do I add D Fetcher to my agent?
Register the streamable-http MCP remote https://dfetcher.com/mcp in Claude Code, Cursor, or your MCP host, then call the Vitamin D tools from your agent session per dfetcher.com docs.