Lousa

Name: Lousa
Author: henriquepe

by henriquepeversion 0.1.1i★ –iRuns on your computer

Registry nameio.github.henriquepe/lousa

Install

Overview

Description from the maker (original English)

A whiteboard where AI agents draw their explanations as hand-drawn animated diagrams

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Runs on your computer
Transport: stdio
Category: Design, images & audio

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
The registry lists no key to fill in.

You need

npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "lousa": {
      "command": "npx",
      "args": [
        "-y",
        "lousa",
        "mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add lousa -- npx -y lousa mcp

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "lousa": {
      "command": "npx",
      "args": [
        "-y",
        "lousa",
        "mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "lousa": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "lousa",
        "mcp"
      ]
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

Your choice stays on this device in a cookie; no account needed.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account henriquepe, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
– Not applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Design, images & audioi

More stars than 0% of the other 2752 servers in this category
Published to the registry more recently than 19% of the other 2752 servers in this category
Basic checks equal to or better than 100% of the other 2752 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Lousa safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.1.1) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

What can I use instead?

In the same category: Figma Context MCP, Claude Real Video, Figma MCP Server

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Figma Context MCP

by GLips

Give your coding agent access to your Figma data. Implement designs in any framework in one-shot.

Runs on your computer★ 16,165MITUpdated 5 months ago

Install

Claude Real Video

by HUANGCHIHHUNGLeo

Let any LLM watch a video locally — and search everything it has ever watched.

Runs on your computer★ 2,284MITUpdated 2 months ago

Install

Figma MCP Server

by figma

Figma’s official server gives AI your design data so it can turn designs into code or describe them accurately. Connects to Figma’s cloud.

Runs in the cloud★ 2,152Updated 13 months ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Lousa

A whiteboard where your AI agent draws its explanations.

Ask your agent *"explain this visually"* and it sketches an animated, hand-drawn diagram on a live board — instead of another wall of text. Lousa is an MCP server + web viewer: the agent authors a declarative scene (boxes, arrows, cylinders, notes), and the board renders it stroke by stroke, as if someone were drawing it in front of you.

*Lousa* is Portuguese for the classic school blackboard.

Why it's different

The agent is the artist. No prompt box, no OCR — your coding agent already has the context and draws through typed MCP tools.
Live, incremental drawing. Follow-ups edit the scene; the open tab animates only what changed, like watching the diagram evolve.
Point at things. Click elements in the viewer to select them, then tell your agent *"improve what I selected"* — it reads your selection through get_selection and targets exactly that.
Boards expire by default (12h, sliding) — a whiteboard, not a document graveyard. ttlHours: 0 keeps a board forever.

Quick start

Requires Node.js 18.17+.

# Claude Code

claude mcp add lousa -- npx -y lousa mcp

or run the server directly

npx lousa # viewer at http://127.0.0.1:4666

Any MCP host works — for stdio configuration use command npx, args ["-y", "lousa", "mcp"]. The stdio endpoint auto-starts the local server, so the viewer is always available. Then ask your agent to *"draw how our auth flow works"* and open the URL it returns.

MCP tools

Tool	What it does
`create_board`	Creates a board from a scene, returns `{id, url}`
`update_board`	Replaces the scene; unchanged elements stay byte-identical so only changes animate
`get_board` / `list_boards`	Read boards
`get_selection`	What the user selected in the viewer (ids + full elements)
`delete_board`	Deletes a board

The scene is a JSON array of elements — box, ellipse, diamond, cylinder, arrow (connects ids), line, text, note — rendered with rough.js. The full schema ships inside the tool definitions; agents need no extra setup.

Self-hosting a shared server

Run lousa on any Node host and point machines at it:

LOUSA_TOKEN=<secret> HOST=0.0.0.0 npx lousa        # server

LOUSA_URL=https://your-host LOUSA_TOKEN= npx lousa mcp # each client

LOUSA_TOKEN gates board listing/creation/deletion and /mcp; per-board URLs act as capability links. AWS Lambda + S3 deployment is supported out of the box (lambda.js handler + LOUSA_BUCKET for storage); any HTTPS front (API Gateway, etc.) works.

Env var	Default	Purpose
`PORT` / `HOST`	`4666` / `127.0.0.1`	server bind
`LOUSA_DATA_DIR`	`~/.lousa/boards`	filesystem board storage
`LOUSA_BUCKET`	—	use S3 storage instead of filesystem
`LOUSA_TOKEN`	—	require bearer token (header or `?t=`) on global routes and MCP
`LOUSA_URL`	—	`lousa mcp` proxies to this remote server
`LOUSA_DEFAULT_TTL_HOURS`	`12`	default board expiry

Development

npm install

npm test # node --test node cli.js # local server

Lousa

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Design, images & audioi

Common questions

Alternatives

Figma Context MCP

Claude Real Video

Figma MCP Server

README from the maker

Lousa

Why it's different

Quick start

or run the server directly

MCP tools

Self-hosting a shared server

Development

License