# io.github.AnonymousOnyx22/stem-calc-student-mcp (npm · stem-calc-student-mcp)

STEM calculator MCP for homework: molar mass, balancing, units, significant figures. Works offline.

- Trust score: 75/100 (medium)
- Change this week: +19
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-11-05

## Components

- npm · `stem-calc-student-mcp`: 75/100 (this document), [markdown](https://verifymcp.io/servers/anonymousonyx22-stem-calc-student-mcp/stem-calc-student-mcp.md), [page](https://verifymcp.io/servers/anonymousonyx22-stem-calc-student-mcp/stem-calc-student-mcp)

## Channel facts

- Registry: `npm`
- Package: `stem-calc-student-mcp`
- Version: `0.1.3`
- 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 2026-11-05.

- **Supply Chain Security**: 98/100
  - No malware found by supply-chain analysis.
  - No known CVEs affecting this package version or its production dependencies.
  - No install/post-install scripts declared.
  - 30 of 92 dependencies flagged as unhealthy.
- **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 (MIT).
  - Actively maintained (last published 4 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 78/100
  - AI-judged instruction clarity (excellent).
  - Tool/resource definitions use about 386 tokens (~77/item across 5 items; 5 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 30/100
  - Stability observed for 9 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.
  - Structured output schemas are declared (100% of tools); any adoption earns full credit.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 5 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### How do I install the io.github.AnonymousOnyx22/stem-calc-student-mcp server?

io.github.AnonymousOnyx22/stem-calc-student-mcp runs locally as an npm package, launched with npx -y stem-calc-student-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add anonymousonyx22-stem-calc-student-mcp -- npx -y stem-calc-student-mcp
```

### Cursor

```json
{
  "mcpServers": {
    "anonymousonyx22-stem-calc-student-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "stem-calc-student-mcp"
      ]
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "anonymousonyx22-stem-calc-student-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "stem-calc-student-mcp"
      ]
    }
  }
}
```

### Codex

```bash
codex mcp add anonymousonyx22-stem-calc-student-mcp -- npx -y stem-calc-student-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "anonymousonyx22-stem-calc-student-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "stem-calc-student-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add anonymousonyx22-stem-calc-student-mcp --command npx --arg -y --arg stem-calc-student-mcp
```

### Hermes

```yaml
mcp_servers:
  anonymousonyx22-stem-calc-student-mcp:
    command: "npx"
    args: ["-y", "stem-calc-student-mcp"]
```

### Netclaw

```json
{
  "McpServers": {
    "anonymousonyx22-stem-calc-student-mcp": {
      "Transport": "stdio",
      "Command": "npx",
      "Arguments": [
        "-y",
        "stem-calc-student-mcp"
      ]
    }
  }
}
```

### Vellum

```bash
assistant mcp add anonymousonyx22-stem-calc-student-mcp -t stdio -c npx -a -y stem-calc-student-mcp
```

### Other

```json
{
  "mcpServers": {
    "anonymousonyx22-stem-calc-student-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "stem-calc-student-mcp"
      ]
    }
  }
}
```

## 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.

### 2026-11-05 (score 75, +1)

No change was recorded against any check on this day. Stability & Change Management went from 27 to 30. That category is still filling its 30-day observation window: 8 days of observed history at the previous scan, 9 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-11-03 (score 74, +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.

### 2026-11-02 (score 73, 0)

- [functional regression] Security disclosure: unverified → fail

### 2026-11-01 (score 73, +1)

- [functional regression] Schema quality: 70 → 77
- [functional regression] Security disclosure: fail → unverified
- [functional] Package version: 0.1.2 → 0.1.3

### 2026-10-31 (score 72, +15)

- [security improvement] Malware scan: unverified → pass

### 2026-10-30 (score 57, +1)

- [security improvement] Malware scan: unverified → pass
- [functional] Package version: 0.1.1 → 0.1.2

### 2026-10-29 (score 56, −14)

- [security regression] Malware scan: pass → unverified
- [functional improvement] Stability: unverified → 0.07
- [functional] Schema quality: good → excellent
- [functional] Package version: 0.1.0 → 0.1.1

### 2026-10-28 (score 70, +15)

- [security improvement] Malware scan: unverified → pass

## MCP tools (5)

### `molar_mass` (~81 tokens)

Molar mass

Parse a chemical formula and return the molar mass in g/mol with the mass each element adds. Handles brackets and hydrates like CuSO4.5H2O.

Input parameters:

- `formula` (string, required): Chemical formula like H2O, Ca(OH)2 or CuSO4.5H2O. Write each element with a capital first letter.

Output parameters:

- `breakdown` (array)
- `mass` (number)

### `balance_equation` (~37 tokens)

Balance equation

Balance a chemical equation written with -> and +.

Input parameters:

- `equation` (string, required): Equation like H2 + O2 -> H2O

Output parameters:

- `balanced` (string)

### `stoichiometry` (~104 tokens)

Stoichiometry

Convert between grams, moles and particles. The formula is required whenever grams are the from or to unit. Converting between moles and particles needs no formula.

Input parameters:

- `formula` (string): The chemical formula, like H2O. Required when from or to is grams. Not used otherwise.
- `from` (string, required): What the value is in.
- `to` (string, required): What to convert it to.
- `value` (number, required): The amount to convert.

Output parameters:

- `result` (number)

### `convert_units` (~117 tokens)

Convert units

Convert a value between units of length, mass, time, volume, energy, temperature, pressure, speed or flow rate. Common spellings like ml, degC, °C and L/min are accepted. It refuses to convert one kind of unit into another.

Input parameters:

- `from` (string, required): The unit it is in, like km, kg, mL, J, C, atm, km/h or L/min.
- `to` (string, required): The unit to convert it to.
- `value` (number, required): The number to convert.

Output parameters:

- `result` (number)

### `round_sig_figs` (~47 tokens)

Round sig figs

Round a number to a given number of significant figures.

Input parameters:

- `sigFigs` (integer, required): How many significant figures to keep.
- `value` (number, required): The number to round.

Output parameters:

- `result` (number)

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/anonymousonyx22-stem-calc-student-mcp/stem-calc-student-mcp#diagnostics

## Score history

- 2026-11-05: 75
- 2026-11-04: 74
- 2026-11-03: 74
- 2026-11-02: 73
- 2026-11-01: 73
- 2026-10-31: 72
- 2026-10-30: 57
- 2026-10-29: 56
- 2026-10-28: 70
- 2026-10-27: 55

## Common questions

### What is the io.github.AnonymousOnyx22/stem-calc-student-mcp server?

io.github.AnonymousOnyx22/stem-calc-student-mcp is listed in the public MCP registry as io.github.AnonymousOnyx22/stem-calc-student-mcp. STEM calculator MCP for homework: molar mass, balancing, units, significant figures. Works offline. This page covers its npm package (stem-calc-student-mcp).

### Is the io.github.AnonymousOnyx22/stem-calc-student-mcp server safe to use?

io.github.AnonymousOnyx22/stem-calc-student-mcp scores 75 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 5 November 2026. It declares no install or post-install scripts. 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 io.github.AnonymousOnyx22/stem-calc-student-mcp server expose?

io.github.AnonymousOnyx22/stem-calc-student-mcp exposes 5 tools: molar_mass, balance_equation, stoichiometry, convert_units, round_sig_figs. Their descriptions and schemas cost roughly 386 tokens of context every time the server is loaded.

### Is the io.github.AnonymousOnyx22/stem-calc-student-mcp server still maintained?

io.github.AnonymousOnyx22/stem-calc-student-mcp 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.

### What licence is the io.github.AnonymousOnyx22/stem-calc-student-mcp server under?

io.github.AnonymousOnyx22/stem-calc-student-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.

## Links

- npm package: https://www.npmjs.com/package/stem-calc-student-mcp
- Socket report: https://socket.dev/npm/package/stem-calc-student-mcp
- Repository: https://github.com/AnonymousOnyx22/stem-calc-student-mcp
- Website: https://brightspacemcp.com/more-mcps/
- Changelog RSS feed: https://verifymcp.io/servers/anonymousonyx22-stem-calc-student-mcp/stem-calc-student-mcp.xml
- Changelog JSON feed: https://verifymcp.io/servers/anonymousonyx22-stem-calc-student-mcp/stem-calc-student-mcp.json
- HTML version of this page: https://verifymcp.io/servers/anonymousonyx22-stem-calc-student-mcp/stem-calc-student-mcp