# three.ws Tutor (npm · @three-ws/tutor-mcp)

Read a Pay-As-You-Learn tutoring session's itemized tab and close it for an attested invoice.

- Trust score: 68/100 (medium)
- Change this week: +44
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- npm · `@three-ws/tutor-mcp`: 68/100 (this document), [markdown](https://verifymcp.io/servers/nirholas-tutor-mcp/three-ws-tutor-mcp.md), [page](https://verifymcp.io/servers/nirholas-tutor-mcp/three-ws-tutor-mcp)

## Channel facts

- Registry: `npm`
- Package: `@three-ws/tutor-mcp`
- Version: `0.1.0`
- 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 (95 of 99), 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 (95 of 99), 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 (Apache-2.0).
  - Actively maintained (last published 39 days ago).
  - Disclosure check failed: no security disclosure policy was found in the source repository.
- **Schema Quality & AI Usability**: 70/100
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 553 tokens (~276/item across 2 items; 2 tools + 0 resources), over budget; trim descriptions and params.
  - 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.

## Install

### Claude

```bash
claude mcp add nirholas-tutor-mcp -- npx -y @three-ws/tutor-mcp
```

### Codex

```bash
codex mcp add nirholas-tutor-mcp -- npx -y @three-ws/tutor-mcp
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "nirholas-tutor-mcp": {
      "type": "local",
      "command": [
        "npx",
        "-y",
        "@three-ws/tutor-mcp"
      ],
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add nirholas-tutor-mcp --command npx --arg -y --arg @three-ws/tutor-mcp
```

### Hermes

```yaml
mcp_servers:
  nirholas-tutor-mcp:
    command: "npx"
    args: ["-y", "@three-ws/tutor-mcp"]
```

### Other

```json
{
  "mcpServers": {
    "nirholas-tutor-mcp": {
      "command": "npx",
      "args": [
        "-y",
        "@three-ws/tutor-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.

### 2026-08-03 (score 68, +4)

- [functional improvement] Stability: unverified → 0.23

### 2026-08-02 (score 64, +46)

- [security regression] Provenance: unverified → fail
- [security improvement] Install scripts: unverified → pass
- [security improvement] Known CVEs: unverified → partial
- [security improvement] Malware scan: unverified → pass
- [security] Stability: Stability not yet verified: not enough scan history yet (needs a 30-day window).
- [functional improvement] Schema quality: unverified → excellent
- [functional improvement] License: unverified → pass
- [functional improvement] Dependency health: unverified → partial
- [functional improvement] Maintenance: unverified → pass
- [functional improvement] MCP protocol: unverified → pass
- [functional] Licence: Apache-2.0

### 2026-07-31 (score 18, −7)

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

### 2026-07-30 (score 25, −18)

- [security regression] Malware scan: pass → unverified

### 2026-07-28 (score 43, +19)

- [functional improvement] Tool coverage: unverified → 100
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: fail
- [functional] First check of Schema quality: unverified
- [functional] First check of Tool coverage: 100

### 2026-07-27 (score 24)

First indexed and scored.

## MCP tools (2)

### `load_session` (~194 tokens)

Load a tutoring session ledger

Read the running tab for a Pay-As-You-Learn tutoring session by its sessionId. Returns the itemized ledger: one lineItem per answered question (question text, level, output tokens, per-item cost in USDC atomics and a "$x.xxxxxx" string, and the timestamp), plus the session status ("open" | "closed"), questionCount, and the running totalAtomics / totalUsd. If the session was already closed it also returns the finalized, attested invoice. A sessionId with no stored history returns an empty open session (questionCount 0) rather than an error — that is an honest "nothing billed yet", not a failure. Viewing the tab is always free; this never charges the learner. Read-only live data.

Input parameters:

- `sessionId` (string, required): Opaque tutoring session identifier (the id the session was opened with). Truncated to 100 chars by the API.

### `close_session` (~186 tokens)

Close a tutoring session (finalize invoice)

Finalize a Pay-As-You-Learn tutoring session and return its itemized, attested invoice. Seals the ledger for the given sessionId: status flips to "closed", a SHA-256 attestation is stamped over the line items and total, and no further questions can be billed to this session afterward. Returns sessionId, createdAt, closedAt, questionCount, the full lineItems array, the totalAtomics / totalUsd owed, and the attestation hash. Closing itself is FREE and moves no funds — the learner was already charged per answered question; this only produces the final receipt. Idempotent: closing an already-closed session returns the same total. Use load_session first if you want to review the tab before sealing it.

Input parameters:

- `sessionId` (string, required): Opaque tutoring session identifier to finalize. Truncated to 100 chars by the API.

## Diagnostics

Captured diagnostic sections: Provenance, Dependencies. The full working is on the page: https://verifymcp.io/servers/nirholas-tutor-mcp/three-ws-tutor-mcp#diagnostics

## Score history

- 2026-08-03: 68
- 2026-08-02: 64
- 2026-08-01: 18
- 2026-07-31: 18
- 2026-07-30: 25
- 2026-07-28: 43
- 2026-07-27: 24

## Links

- npm package: https://www.npmjs.com/package/@three-ws/tutor-mcp
- Socket report: https://socket.dev/npm/package/@three-ws/tutor-mcp
- Repository: https://github.com/nirholas/three.ws
- Website: https://three.ws/
- Changelog RSS feed: https://verifymcp.io/servers/nirholas-tutor-mcp/three-ws-tutor-mcp/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/nirholas-tutor-mcp/three-ws-tutor-mcp/changelog.json
- HTML version of this page: https://verifymcp.io/servers/nirholas-tutor-mcp/three-ws-tutor-mcp