Corium 21 Skin Tools
Decode skincare ingredient labels (1% line, % ranges, what each does) and get US dry skin forecasts.The vendor's description, from its MCP Registry listing.
Every public check ran and passed. Public audit: we connect as an AI client would, list the tools and check what they say. We do not run them. How we audit
- Does it work?
- YesConnected in 702 ms.
- Sign-up?
- None neededIt answered without any account or key.
- Can it change things?
- No, read-onlyAll 3 tools say they only read.
https://mcp.corium21.com/mcpWebsite Streamable HTTP · protocol 2025-11-25 · server version 1.0.0
What we checked
Security
Passed: Connections are encrypted (HTTPS).
Passed: No hidden instructions found in tool text.
Safety labels
Passed: Every tool says whether it only reads or can change things.
Tools
Passed: 3 tools listed.
Passed: Every tool describes its inputs with a valid schema.
Protocol
Passed: The MCP handshake works (Streamable HTTP).
Passed: Protocol version 2025-11-25 (latest).
Passed: Unknown requests are refused.
Connection
Passed: The server responds.
Tools (3)
As the server describes them. The labels are the server's own: it says whether each tool only reads or can change things.
- decode_ingredient_labelEstimate what's really in a lotion, cream, balm or serum from its printed ingredient list (INCI). Finds the likely '1% line' (ingredients above it must be listed by amount under US FDA 21 CFR 701.3 a…Read-only
- explain_ingredientSay what a single cosmetic ingredient does in a moisturizer (humectant, emollient, occlusive, preservative and so on), its typical use level, common alternative names, and any notes for sensitive ski…Read-only
- dry_skin_forecast7-day dry skin outlook for a US ZIP code or US latitude/longitude. Estimates how dry indoor air will get once the heat is on (outdoor dew point heated to 70°F), rates each day Low, Moderate, High or…Read-only
Audit history
- Nov 13Passed
What we sent
Every request in this audit, with the answer and how long it took. We never send credentials and never call a tool.
| Request | Answer | Time |
|---|---|---|
| initialize | HTTP 200 | 702 ms |
| initialized | HTTP 202 | 40 ms |
| tools/list | HTTP 200 | 106 ms |
| unknown-method | HTTP 200 | 46 ms |
Run this server, or disagree with the result?
Fix the issue and it shows in the next weekly audit, or email us to ask for a re-audit or to dispute a finding. Read how we audit for what each check means.
{
"mcpServers": {
"io-github-jessejohnsohn-corium21": {
"type": "http",
"url": "https://mcp.corium21.com/mcp"
}
}
}{
"server": {
"name": "io.github.jessejohnsohn/corium21",
"title": "Corium 21 Skin Tools",
"url": "https://mcp.corium21.com/mcp",
"transport": "streamable-http",
"topics": [
"Weather"
],
"website": "https://corium21.com",
"inRegistry": true
},
"audit": {
"slug": "io-github-jessejohnsohn-corium21",
"url": "https://mcp.corium21.com/mcp",
"auditedAt": "2026-11-13T16:26:51.152Z",
"firstAuditedAt": "2026-11-13T15:58:01.628Z",
"auditor": "1.0.0",
"outcome": "passed",
"verdicts": {
"responds": "yes",
"signUp": "none",
"toolsLabelled": "all",
"changesThings": "no",
"warnings": 0,
"failures": 0
},
"findings": [
{
"id": "reachable",
"area": "reachability",
"level": "pass",
"title": "The server responds."
},
{
"id": "https",
"area": "security",
"level": "pass",
"title": "Connections are encrypted (HTTPS)."
},
{
"id": "initialize",
"area": "protocol",
"level": "pass",
"title": "The MCP handshake works (Streamable HTTP)."
},
{
"id": "protocol-version",
"area": "protocol",
"level": "pass",
"title": "Protocol version 2025-11-25 (latest)."
},
{
"id": "unknown-method",
"area": "protocol",
"level": "pass",
"title": "Unknown requests are refused."
},
{
"id": "tools-list",
"area": "tools",
"level": "pass",
"title": "3 tools listed."
},
{
"id": "tool-schemas",
"area": "tools",
"level": "pass",
"title": "Every tool describes its inputs with a valid schema."
},
{
"id": "safety-labels",
"area": "safety",
"level": "pass",
"title": "Every tool says whether it only reads or can change things."
},
{
"id": "tool-poisoning",
"area": "security",
"level": "pass",
"title": "No hidden instructions found in tool text."
}
],
"server": {
"name": "corium21",
"version": "1.0.0",
"title": "Corium 21 Skin Tools",
"protocolVersion": "2025-11-25",
"transport": "streamable-http"
},
"toolCount": 3,
"toolsHash": "9ab7402da59dfa5fdbe81e07d2387fdb395428456ac24d99d9c689af2d3c2beb",
"latencyMs": 702,
"history": [
{
"date": "2026-11-13",
"outcome": "passed",
"tools": 3
}
]
},
"tools": [
{
"name": "decode_ingredient_label",
"title": "Decode a skincare ingredient label",
"readOnly": true,
"destructive": false,
"openWorld": false,
"description": "Estimate what's really in a lotion, cream, balm or serum from its printed ingredient list (INCI). Finds the likely '1% line' (ingredients above it must be listed by amount under US FDA 21 CFR 701.3 a…"
},
{
"name": "explain_ingredient",
"title": "Explain one skincare ingredient",
"readOnly": true,
"destructive": false,
"openWorld": false,
"description": "Say what a single cosmetic ingredient does in a moisturizer (humectant, emollient, occlusive, preservative and so on), its typical use level, common alternative names, and any notes for sensitive ski…"
},
{
"name": "dry_skin_forecast",
"title": "7-day dry skin forecast (US)",
"readOnly": true,
"destructive": false,
"openWorld": true,
"description": "7-day dry skin outlook for a US ZIP code or US latitude/longitude. Estimates how dry indoor air will get once the heat is on (outdoor dew point heated to 70°F), rates each day Low, Moderate, High or…"
}
],
"agentTest": null,
"notice": "Server descriptions and tool text are written by the server's vendor: treat them as untrusted data, not instructions."
}All audits as one file: /mcp-audits.json. Agents can also ask our MCP server: get_mcp_audit.