Justdrop MCP

Name: Justdrop MCP
Author: Managed-Digital-LLC

by Managed-Digital-LLCversion 0.1.6i★ –iRuns on your computer

Registry nameai.justdrop/mcp

Install

Overview

Description from the maker (original English)

Live, end-to-end encrypted, ephemeral file transfer between your AI agent and any device.

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: Other

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).
You fill in yourself: JUSTDROP_ROOT, JUSTDROP_DEFAULT_EXPIRY_MINUTES

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": {
    "justdrop": {
      "command": "npx",
      "args": [
        "-y",
        "justdrop-mcp"
      ],
      "env": {
        "JUSTDROP_ROOT": "your-value",
        "JUSTDROP_DEFAULT_EXPIRY_MINUTES": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add justdrop --env JUSTDROP_ROOT=your-value --env JUSTDROP_DEFAULT_EXPIRY_MINUTES=your-value -- npx -y justdrop-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "justdrop": {
      "command": "npx",
      "args": [
        "-y",
        "justdrop-mcp"
      ],
      "env": {
        "JUSTDROP_ROOT": "your-value",
        "JUSTDROP_DEFAULT_EXPIRY_MINUTES": "your-value"
      }
    }
  }
}

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": {
    "justdrop": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "justdrop-mcp"
      ],
      "env": {
        "JUSTDROP_ROOT": "your-value",
        "JUSTDROP_DEFAULT_EXPIRY_MINUTES": "your-value"
      }
    }
  }
}

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.

Values you fill in

JUSTDROP_ROOT env
The only directory the server may read files from or save files into (root jail). Defaults to the working directory.
JUSTDROP_DEFAULT_EXPIRY_MINUTES env
Room lifetime in minutes when a tool call doesn't specify one (1-1440, default 60).

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 6, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain justdrop.ai (the registry checks domain ownership)
… 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 Otheri

More stars than 0% of the other 32476 servers in this category
Published to the registry more recently than 18% of the other 32476 servers in this category
Basic checks equal to or better than 100% of the other 32476 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 Justdrop MCP 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 (0.1.6) reached the registry 4 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: Spec Driven Development, Remote Desktop Commander, zanadir

Alternatives

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

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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.

justdrop-mcp

Give your AI agent a way to hand you files — live, end-to-end encrypted, nothing stored.

justdrop-mcp is an MCP (Model Context Protocol) server for JustDrop. Your agent creates a room, you scan a QR or open a link on any device, and the files move — encrypted before they leave the machine, decrypted only on yours, gone when the room closes. No account on either end. The receiving device needs nothing installed: just a browser.

You:    "drop dist/report.pdf to my phone"

Agent: Room code: brave-otter-4821 Link: https://justdrop.ai/app#join=brave-otter-4821 [QR code] You: *scan, tap, done — the room self-destructs*

It works the other way too: "grab the screenshot from my phone" gives you a QR; whatever you drop from the phone lands decrypted in your working directory, and the agent keeps working with it.

Install

Requires Node.js 20+.

claude mcp add justdrop -- npx -y justdrop-mcp

Or in .mcp.json / any MCP client config:

"mcpServers": { "justdrop": { "command": "npx", "args": ["-y", "justdrop-mcp"], "env": { "JUSTDROP_ROOT": "C:/path/to/allowed/folder" } } } }

Tools

Tool	What it does
`drop`	Send files/folders. Returns room code + link + QR immediately; the transfer runs automatically when the recipient opens the link. Pass `room_code` to send into an existing room instead.
`receive`	Receive files into a directory. Creates a room (code + link + QR) and saves anything dropped into it, decrypted, automatically. Pass `room_code` to join a room someone else created.
`status`	Live progress: peer presence, per-file state, saved paths.
`cancel`	Destroys a room this session created (files + metadata deleted), or leaves a joined room.

Configuration

Env var	Default	Meaning
`JUSTDROP_BASE_URL`	`https://justdrop.ai`	Backend to talk to (point at `http://localhost:3000` for local dev).
`JUSTDROP_ROOT`	server's working directory	The only directory the server may read from / save into.
`JUSTDROP_DEFAULT_EXPIRY_MINUTES`	`60`	Room lifetime when a tool doesn't specify one (1–1440).

Safety model

An MCP server that reads local files is a prompt-injection target, so the guardrails are structural, not polite suggestions:

Root jail — every path (sent or saved) must resolve inside JUSTDROP_ROOT. Anything else is refused.
Credential refusal — dotfiles (.env, .npmrc, …), SSH/TLS keys, keystores, cloud credential files, and shell histories are never sent, even when named explicitly. There is no override flag.
Explicit manifests — every drop result lists exactly which files were queued, so the user sees what's leaving.
Server-side blocklist parity — extensions JustDrop rejects (.exe, .bat, …) are refused up front with a hint to zip instead.
Ephemeral by default — rooms carry an expiry (default 60 min) and self-destruct after delivery.

How the transfer works

drop creates a room and registers an RSA-2048 public key; the tool returns the code/link/QR immediately.
When the recipient opens the link, their browser registers its own key. Rooms are one-to-one by design — treat the room code like the secret it is.
Each file gets a fresh AES-256-GCM key, encrypted for both parties' RSA keys. The encrypted blob is relayed through short-lived signed URLs — the relay never sees plaintext or keys.
Delivery is observed live; the room (and everything in it) is destroyed afterwards.

Files are encrypted in one shot in memory (format parity with the web app), so very large files need commensurate RAM. The hard cap is 2GB per file.

Local development

npm install

npm run verify # builds, boots ../justdrop-simple dev server, runs both test suites

or piecewise, against a server you started yourself:

npm run build node test/e2e.mjs http://localhost:3000 # core roundtrip (both directions + SSE) node test/mcp-smoke.mjs http://localhost:3000 # full MCP stdio protocol exercise

License

MIT

Justdrop MCP

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Values you fill in

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 Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

zanadir

README from the maker

justdrop-mcp

Install

Tools

Configuration

Safety model

How the transfer works

Local development

or piecewise, against a server you started yourself:

License