Corium 21 Skin Tools
REMOTE · MCP.CORIUM21.COM
Decode skincare ingredient labels (1% line, % ranges, what each does) and get US dry skin forecasts.
Available components
Last scanned (4 hours ago)
Scores higher than 60% of remote servers
Reachable. Last reached 5 Nov 2026.
Category Health and Science
How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. How we score → Why this is hard to score →
Endpoint Security74
- The endpoint's TLS certificate is valid, in date, and uses a strong key. View diagnostics → Pass
- No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one. See how to fix → View diagnostics → Partial
- HTTPS is enforced; there's no plaintext access path. View diagnostics → Pass
- HSTS check failed: the Strict-Transport-Security header is absent. See how to fix → View diagnostics → Fail
- DNSSEC check failed: this domain isn't protected by DNSSEC. See how to fix → View diagnostics → Fail
Transport & Reachability100
- Verified streamable-http transport via a live MCP handshake. View diagnostics → Pass
Schema Quality & AI Usability71
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 598 tokens (~199/item across 3 items; 3 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management20
- Stability observed for 6 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 3 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 4 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 4 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 13 to 17. That category is still filling its 30-day observation window: 4 days of observed history at the previous scan, 5 at this one. The score rises as the window fills, whether or not the server changes.
- 2 Nov 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.
- 31 Oct 26 +1
- Stability: unverified → 0.03 ▲ functional
- 30 Oct 26 70
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 5 Nov 2026 · Probed https://mcp.corium21.com/mcp
TLS valid
Negotiated TLS 1.3 with TLS_AES_128_GCM_SHA256 .
| Subject | Issuer | Valid from | Valid until | Key | Signature | Serial |
|---|---|---|---|---|---|---|
| CN=mcp.corium21.com | CN=WE1,O=Google Trust Services,C=US | 29 Oct 2026 | 27 Jan 2027 | ECDSA 256 | ECDSA-SHA256 | 8ca3d27f7690bcee0e7908c1374ae315 |
| SANs: mcp.corium21.com | ||||||
| CN=WE1,O=Google Trust Services,C=US (CA) | CN=GTS Root R4,O=Google Trust Services LLC,C=US | 13 Dec 2023 | 20 Feb 2029 | ECDSA 256 | ECDSA-SHA384 | 7ff31977972c224a76155d13b6d685e3 |
| CN=GTS Root R4,O=Google Trust Services LLC,C=US (CA) | CN=GlobalSign Root CA,OU=Root CA,O=GlobalSign nv-sa,C=BE | 15 Nov 2023 | 28 Jan 2028 | ECDSA 384 | SHA256-RSA | 7fe530bf331343bedd821610493d8a1b |
Background: What to check on a remote MCP endpoint →
DNSSEC insecure
Validation of mcp.corium21.com. — Not signed
| Zone | DS | Keys | Algorithms | Outcome |
|---|---|---|---|---|
| . | trust_anchor | 20326, 38696 | 8, 8 | Verified |
| com. | present | 19718 | 13 | Verified |
| corium21.com. | absent | Unsigned (proven) parent-signed NSEC/NSEC3 proves an unsigned delegation |
Authentication No authorisation required
The endpoint answered without asking for a token. Anyone who knows the URL can reach it.
| Result | No authorisation required |
|---|---|
| HTTP status | 200 |
Background: How OAuth 2.1 works in the 2026 MCP spec →
Transports 2 probes
| Transport | URL | Outcome | Status | Location |
|---|---|---|---|---|
| streamable-http | https://mcp.corium21.com/mcp | Verified | 200 | |
| http (plaintext) | http://mcp.corium21.com/mcp | HTTPS enforced | 301 | https://mcp.corium21.com/mcp |
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
decode_ingredient_label Decode a skincare ingredient label ~218
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 and EU rules), gives a rough percentage range for each ingredient above the line, says what each ingredient does, and adds neutral notes on ingredients people with sensitive or eczema-prone skin often avoid (fragrance, essential oils, some preservatives). Estimates come from label order and typical use levels; they are not lab measurements. Same engine as https://corium21.com/pages/ingredient-label-decoder.
| Name | Type | Req | Description |
|---|---|---|---|
| ingredients | string | yes | The ingredient list exactly as printed on the label, comma separated. A pasted 'Ingredients:' heading, 'May contain' section or Drug Facts panel is fine. |
| product_type | string | – | cream = lotion or cream (default); rich = rich cream, body butter or balm; light = light lotion, gel-cream or serum. Adjusts typical use levels. |
No output schema declared.
No examples provided.
dry_skin_forecast 7-day dry skin forecast (US) ~161
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 Very high, and gives a simple skin-care tip for each level. Uses the US National Weather Service forecast; US locations only. Same method as https://corium21.com/pages/dry-skin-forecast.
| Name | Type | Req | Description |
|---|---|---|---|
| days | integer | – | How many days to return, starting today. |
| latitude | number | – | Latitude of a US location. |
| longitude | number | – | Longitude of a US location. |
| zip | string | – | 5-digit US ZIP code. Use this or latitude + longitude. |
No output schema declared.
No examples provided.
explain_ingredient Explain one skincare ingredient ~112
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 skin. Covers 233 common moisturizer ingredients by INCI or common name, and makes a labeled best guess from the name for anything else.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Ingredient name, INCI or common, e.g. 'Butyrospermum Parkii Butter' or 'shea butter'. |
No output schema declared.
No examples provided.
How do I install the Corium 21 Skin Tools MCP server?
Corium 21 Skin Tools is a hosted endpoint at https://mcp.corium21.com/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
remote · mcp.corium21.com
claude mcp add --transport http jessejohnsohn-corium21 'https://mcp.corium21.com/mcp'
What is the Corium 21 Skin Tools MCP server?
Corium 21 Skin Tools is an MCP server listed in the public MCP registry as io.github.jessejohnsohn/corium21. Decode skincare ingredient labels (1% line, % ranges, what each does) and get US dry skin forecasts. This page covers its hosted endpoint (https://mcp.corium21.com/mcp).
Is the Corium 21 Skin Tools MCP server safe to use?
Corium 21 Skin Tools scores 73 out of 100 on VerifyMCP. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the Corium 21 Skin Tools MCP server expose?
Corium 21 Skin Tools exposes 3 tools: decode_ingredient_label, explain_ingredient, dry_skin_forecast. Their descriptions and schemas cost roughly 491 tokens of context every time the server is loaded.
Does the Corium 21 Skin Tools MCP server require authentication?
No. We connected to Corium 21 Skin Tools without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.
Is the Corium 21 Skin Tools MCP server still maintained?
Corium 21 Skin Tools is still listed as active in the MCP registry. We last reached this channel on 5 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.