ai-tutor-mcpSAFE
three.ws Pay-As-You-Learn tutor ledger from any AI agent — read a learning session's itemized running tab and close it for an attested invoice. Free, no key, no signer; answering questions is the paid action handled elsewhere.
Overview
From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.
@three-ws/tutor-mcp
Manage a Pay-As-You-Learn tutoring session from any AI agent — read its itemized running tab and close it for an attested invoice.
A Model Context Protocol server that exposes the three.ws Pay-As-You-Learn tutor ledger over stdio. Read a tutoring session's itemized tab — one line item per answered question, with per-item cost and a running total — and close the session to seal an attested invoice.
The tutor bills per answered question; this server's tools are free. Viewing the running tab and closing the session never charge the learner — a learner must never pay to see what they owe or to end the session. Sessions are addressed by an opaque sessionId, so no API key and no signer are required — point THREE_WS_BASE at a deployment and go.
Install
npm install @three-ws/tutor-mcp
Or run with npx (no install):
npx @three-ws/tutor-mcp
Quick start
Claude Code, one line:
claude mcp add tutor -- npx -y @three-ws/tutor-mcp
Claude Desktop / Cursor (claude_desktop_config.json or
75a5e1300a74OBSERVED · 2026-10-10Connect
Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control.
claude mcp add tutor-mcp -- npx -y @three-ws/[email protected]
Trust audit
SAFEgrade B · trust 89/100 Nothing in the source contradicts what it says it does. Grade A is reserved for packages that have also passed the behavioural sandbox.
| Layer | What it checks | Result |
|---|---|---|
| L0 | Provenance & inventory | PASS |
| L1 | Static analysis of the code | PASS |
| L2 | Instruction surface (what it tells the agent) | PASS |
| L3 | Class-specific surface | PASS |
| L4 | Behavioural (sandbox) | SKIPPED |
What the source does
- Filesystem
- none-observed
- Network
- declared (1 observation(s))
- Shell
- none-observed
- Dependencies
- not all pinned
- Secrets in source
- none-found
Findings (3)
.nojekyll
@modelcontextprotocol/sdk, zod
Gates applied: no_behavioural_pass.
75a5e1300a74full audit observations/trust-audit/mcp-server/nirholas__ai-tutor-mcp.json · Report an issue / request a re-scanAudit history
Every audit this server has had. A grade with a past is a grade somebody is still checking.
| Date | Source | Verdict | Grade | Score | Change |
|---|---|---|---|---|---|
| 2026-10-10 | 75a5e1300a74 | SAFE | B | 89 | first audit |
Questions
What is the ai-tutor-mcp MCP server?
three.ws Pay-As-You-Learn tutor ledger from any AI agent — read a learning session's itemized running tab and close it for an attested invoice. Free, no key, no signer; answering questions is the paid action handled elsewhere.
Is ai-tutor-mcp safe to connect to an agent?
The audit found nothing in the source that contradicts what it says it does, and graded it B (89/100). Grade A is held back for packages that have also passed a sandboxed behavioural run, which is why a clean server reads B.
What credentials does ai-tutor-mcp need?
No credential environment variables were found in its source, so it appears to need none.
How does ai-tutor-mcp run?
It speaks stdio, so it runs as a local process your client starts. It is published on npm as @three-ws/tutor-mcp at 0.1.2.
How current is this page?
The grade is for one exact copy of the source (75a5e1300a74), read on 2026-10-10. The repository is watched and re-audited when it changes.