three.ws Tutor runs on your own machine — the client starts it, so there is no endpoint to ping. 73 installs a week from npm. Last commit 1 Nov 2026.
Read a Pay-As-You-Learn tutoring session's itemized tab and close it for an attested invoice.
What the code does
We read the source, 22 h ago · rules 995398eba69f
Things with no honest explanation: a promise that contradicts the code, code that runs at install time while hiding what it does, data leaving the machine.
'http://metadata.google.internal/computeMetadata/v1/instance/service-accounts/default/token',
What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.
const proc = spawn(ffmpegPath(), ['-hide_banner', '-loglevel', 'error', '-i', 'pipe:0', ...args, 'pipe:1']);
const [row] = await sql`SELECT voice_provider, voice_id FROM agent_identities WHERE id = ${agentId}`.catch(() => []);
const r = await redis.eval(
return JSON.parse(await readFile(path.join(base, rel), 'utf8'));
lambda: subprocess.run(
if (reset) { state.cursor = null; state.total = 0; grid.innerHTML = skeletons(); stateEl.hidden = true; }
`https://api.telegram.org/bot${cfg.token}/sendMessage`,
"bytecode": "0x60806040523480156200001157600080fd5b5060405162000dd238038062000dd2833981016040819052620000349162000351565b8383600362000044838262000477565b50600462000053828262000477565b5050506001600160a01b038116620000a65760405162461bcd60e51b8152602060048201526011602482015270726…
COPY --parents package.json package-lock.json .npmrc* **/package.json /app/
const entries = await readdir(path.join(ROOT, parent), { withFileTypes: true });
Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.
We found things in this code
Code changes quietly between releases, and nobody reads the diff of a dependency. We do, on every release — watch three.ws Tutor and you get told the day something new turns up.
Connect this server
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add tutor-mcp -- npx -y @three-ws/tutor-mcp{
"mcpServers": {
"tutor-mcp": {
"command": "npx",
"args": [
"-y",
"@three-ws/tutor-mcp"
]
}
}
}[mcp_servers.tutor-mcp]
command = "npx"
args = ["-y", "@three-ws/tutor-mcp"]{
"mcpServers": {
"tutor-mcp": {
"command": "npx",
"args": [
"-y",
"@three-ws/tutor-mcp"
]
}
}
}{
"servers": {
"tutor-mcp": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"@three-ws/tutor-mcp"
]
}
}
}Optional settings from the registry entry, left out of the block above:
THREE_WS_BASE (Base URL of the three.ws API that serves the tutor session endpoint. Override only when self-hosting or targeting a preview deployment), THREE_WS_TIMEOUT_MS (Per-request timeout in milliseconds for the tutor session reads and the close call).
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three.ws Tutor — questions
Answers built from our own checks of this server.