# io.github.scottmreed/ChemCP (npm · chemcp)

MCP App that renders 2D molecular structures from SMILES using RDKit.js

- Trust score: 71/100 (medium)
- Change this week: +18
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `chemcp`: 71/100 (this document), [markdown](https://verifymcp.io/servers/scottmreed-chemcp/chemcp.md), [page](https://verifymcp.io/servers/scottmreed-chemcp/chemcp)

## Channel facts

- Registry: `npm`
- Package: `chemcp`
- Version: `1.1.0`
- Transport: `stdio`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Supply Chain Security**: 87/100
  - No malware found by supply-chain analysis.
  - Only part of the dependency tree could be resolved (96 of 97), so this covers what we could see, not the whole tree.
  - No install/post-install scripts declared.
  - Only part of the dependency tree could be resolved (96 of 97), so this covers what we could see, not the whole tree.
- **Provenance & Transparency**: 45/100
  - Source repository is publicly reachable at the declared URL.
  - Provenance check failed: no build-provenance attestation is published.
  - Clear OSI-approved license (ISC).
  - Actively maintained (last published 172 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 85/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 148 tokens (~74/item across 2 items; 1 tools + 1 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 23/100
  - Stability observed for 7 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.
  - Supports UI / widget rendering.

## Install

### Claude

```bash
claude mcp add scottmreed-chemcp -- npx -y chemcp
```

### Codex

```bash
codex mcp add scottmreed-chemcp -- npx -y chemcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "scottmreed-chemcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "chemcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add scottmreed-chemcp --command npx --arg -y --arg chemcp
```

### Hermes

```yaml
mcp_servers:
  scottmreed-chemcp:
    command: "npx"
    args: ["-y", "chemcp"]
```

### Other

```json
{
  "mcpServers": {
    "scottmreed-chemcp": {
      "command": "npx",
      "args": [
        "-y",
        "chemcp"
      ]
    }
  }
}
```

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 71, +1)

No change was recorded against any check on this day. Stability & Change Management went from 20 to 23. That category is still filling its 30-day observation window: 6 days of observed history at the previous scan, 7 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-02 (score 70, +44)

- [security regression] Provenance: unverified → fail
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Install scripts: unverified → pass
- [security improvement] Malware scan: unverified → pass
- [functional regression] Security disclosure: fail → unverified
- [functional regression] Tool coverage: 100 → unverified
- [functional regression] Schema quality: 100 → unverified
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Stability: unverified → 0.20
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional] First check of Capabilities: pass
- [functional] Licence: ISC

### 2026-07-31 (score 26, −9)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 35, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-27 (score 53)

First indexed and scored.

## MCP tools (1)

### `render_molecule` (~131 tokens)

Render Molecule

Renders an interactive 2D structure diagram of a molecule from its SMILES notation. Displays the molecule image along with computed molecular properties (molecular weight, LogP, H-bond donors/acceptors, TPSA, etc.). Use this whenever a user asks to see, visualize, draw, or display a chemical structure.

Input parameters:

- `smiles` (string, required): SMILES notation of the molecule (e.g. 'CCO' for ethanol, 'c1ccccc1' for benzene, 'CC(=O)Oc1ccccc1C(=O)O' for aspirin)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/scottmreed-chemcp/chemcp#diagnostics

## Score history

- 2026-08-03: 71
- 2026-08-02: 70
- 2026-08-01: 26
- 2026-07-31: 26
- 2026-07-30: 35
- 2026-07-28: 53
- 2026-07-27: 53

## Links

- npm package: https://www.npmjs.com/package/chemcp
- Socket report: https://socket.dev/npm/package/chemcp
- Repository: https://github.com/scottmreed/ChemCP
- Changelog RSS feed: https://verifymcp.io/servers/scottmreed-chemcp/chemcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/scottmreed-chemcp/chemcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/scottmreed-chemcp/chemcp