mcp-registry/com.dfetcher/vitamin-d · v1.0.0
As of 2026-10-26 21:36 UTC, the Dfetcher Vitamin D MCP server is up with a Glimind reliability score of 96/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 1 outage in 90 days, with a median recovery of 7 minutes.
Vitamin D synthesis calculator: sun position, UV, IU/min, time to dose, sunburn risk, daily window.
Point your MCP client at this streamable-http endpoint: https://dfetcher.com/mcp
3 of 3 tool(s) carry no readOnlyHint/destructiveHint annotations.
Annotate read-only tools with {"readOnlyHint": true}. Agents and gateways can then run them without a confirmation prompt, and route around destructive ones. How to fix →
No tool declares an outputSchema.
Declare outputSchema and return structuredContent (MCP 2025-06-18+). Agents can then parse results without guessing, and chain tools reliably. How to fix →
Paste-ready definitions with the problems above fixed. Changes marked verify need a human look. All of them as JSON: /v1/readiness/mcp-registry%2Fcom.dfetcher%2Fvitamin-d/fixes
{
"name": "calculate",
"description": "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-sky fallback.",
"inputSchema": {
"type": "object",
"required": [
"lat",
"lon"
],
"properties": {
"age": {
"type": "integer",
"default": 45,
"maximum": 120,
"minimum": 1,
"description": "Age in years (used for the age factor)."
},
"day": {
"type": "boolean",
"default": true,
"description": "Include 15-min samples through the local day."
},
"lat": {
"type": "number",
"maximum": 90,
"minimum": -90,
"description": "Latitude in degrees."
},
"lon": {
"type": "number",
"maximum": 180,
"minimum": -180,
"description": "Longitude in degrees."
},
"area": {
"type": "number",
"default": 0.25,
"maximum": 1,
"minimum": 0,
"description": "Exposed body fraction. 0.10 face+hands, 0.25 arms+face, 0.40 t-shirt+shorts, 0.85 near-full body."
},
"date": {
"type": "string",
"description": "ISO 8601 timestamp or epoch ms. Defaults to now."
},
"skin": {
"type": "integer",
"default": 3,
"maximum": 6,
"minimum": 1,
"description": "Fitzpatrick skin type 1–6. Use describe_skin_types if unknown."
},
"year": {
"type": "boolean",
"default": true,
"description": "Include monthly solar-noon samples with cloud climatology."
},
"scalp": {
"enum": [
"hair",
"bald"
],
"type": "string",
"default": "hair",
"description": "Scalp coverage. \"bald\" adds ~3.5% BSA."
},
"target": {
"type": "integer",
"default": 1000,
"maximum": 50000,
"minimum": 100,
"description": "Daily vitamin D target in IU."
}
}
},
"annotations": {
"readOnlyHint": true
},
"title": "Vitamin D synthesis calculator"
}{
"name": "describe_skin_types",
"description": "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.",
"inputSchema": {
"type": "object",
"properties": {}
},
"annotations": {
"readOnlyHint": true
},
"title": "Fitzpatrick skin type reference"
}{
"name": "geocode",
"description": "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.",
"inputSchema": {
"type": "object",
"required": [
"query"
],
"properties": {
"query": {
"type": "string",
"minLength": 1,
"description": "City name, postal code, or \"CODE, CC\" (e.g. \"75001, FR\")."
}
}
},
"annotations": {
"readOnlyHint": true
},
"title": "Resolve a place to lat/lon"
}Get an email or webhook when this server's readiness drops by 10+ points, tool-poisoning text appears, or a tool breaks:
curl -X POST https://glimind.com/v1/subscriptions -H 'content-type: application/json' -d '{"tools":["mcp-registry/com.dfetcher/vitamin-d"],"email":"[email protected]"}'Agents: watch_tool({"toolId": "mcp-registry/com.dfetcher/vitamin-d"}) over MCP.
calculate ~442 tokensgeocode ~144 tokensdescribe_skin_types ~84 tokensStatic checks of the advertised tools/list (schema, descriptions, annotations, tool-poisoning patterns, names, size) plus observed protocol, uptime, latency and contract changes. Read-only: no tool is ever called. Weights: schema 15, docs 20, safety 15, efficiency 15, compatibility 15, protocol 5, reliability 10, stability 5. Token counts are estimates (~3.6 characters per token).
Operator? Fix these, then re-check live. Embed the readiness badge:
[](https://glimind.com/server/mcp-registry%2Fcom.dfetcher%2Fvitamin-d?ref=badge)
<a href="https://glimind.com/server/mcp-registry%2Fcom.dfetcher%2Fvitamin-d?ref=badge"><img src="https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.dfetcher%2Fvitamin-d.svg" alt="MCP agent-readiness"></a>
.. image:: https://glimind.com/v1/readiness/badge/mcp-registry%2Fcom.dfetcher%2Fvitamin-d.svg :target: https://glimind.com/server/mcp-registry%2Fcom.dfetcher%2Fvitamin-d?ref=badge :alt: MCP agent-readiness
Glimind records every version of this server's tool definitions in a signed, append-only transparency log. Current manifest sha256:8c381398d657ad8f…, first seen 2026-10-17, included at leaf 616 of 75,587. Version history · verify what your client received.
Compare: most reliable data servers · most reliable knowledge servers
Glimind tells agents whether a server is up right now and how to call it, then fails over to a live alternative when it isn't.
Claude Code
claude mcp add --transport http glimind https://glimind.com/mcp
Claude Desktop · Windsurf · Cline (mcpServers JSON)
{
"mcpServers": {
"glimind": {
"type": "http",
"url": "https://glimind.com/mcp"
}
}
}
As of 2026-10-26 21:36 UTC, the Dfetcher Vitamin D MCP server is up with a Glimind reliability score of 96/100 (grade A). Over the last 30 days it answered 100% of Glimind's liveness checks. It had 1 outage in 90 days, with a median recovery of 7 minutes.
Dfetcher Vitamin D MCP server advertises 3 tools, including calculate, describe_skin_types, geocode.
Point your MCP client at this streamable-http endpoint: https://dfetcher.com/mcp
Glimind scanned all 3 tool definitions for tool-poisoning patterns — hidden or invisible characters, instructions that override the model, concealment from the user, requests to read credential or MCP config files, conversation exfiltration and cross-tool shadowing — and found none. This checks what the server tells the model, not what its code does; review the source before granting access to sensitive data.
Status page: 90-day uptime, every outage and how long it lasted.
Claim this listing to get the Verified operator marker, a remediation checklist and owner analytics, or embed the live badge from any of the tool pages above. Maintainers: alerts, deploy attestation and monthly reports.
Status is an automated estimate from Glimind's liveness checks (handshake and tool listing only; no tool is ever called) and may lag or differ from your network. Glimind is not affiliated with this server or its operator. Operator? Request a correction or opt out at https://glimind.com/opt-out.