EmptyInbox

Name: EmptyInbox
Author: blockonomics

by blockonomicsversion 1.5.0i★ 4 (Stars belong to another repo)iRuns on your computer

Registry nameio.github.cnohall/emptyinbox

How to install

Overview

Description from the maker (original English)

Zero-config disposable email inboxes for AI agents: create, read mail, await verify codes.

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: Chat & email
You need to fill in: EMPTYINBOX_API_KEY

Install

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

Passed 1/2 checks · Runs on your computer

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

You need a EmptyInbox key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a EmptyInbox key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "emptyinbox": {
      "command": "npx",
      "args": [
        "-y",
        "emptyinbox-mcp"
      ],
      "env": {
        "EMPTYINBOX_API_KEY": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use EmptyInbox and tell me what you can do for me, then show me one thing
✓ If Claude says it is using EmptyInbox or shows a EmptyInbox tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect EmptyInbox yet

EmptyInbox runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect EmptyInbox

Steps for Claude →You need a EmptyInbox key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a EmptyInbox key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)
Steps for Cursor →You need a EmptyInbox key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)
Steps for VS Code →You need a EmptyInbox key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

B · Others in Chat & email that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Inbox Zero✓ ChatGPT
Agent-Native Chat✓ ChatGPT
draw.io✓ ChatGPT

Works with Claude Code, with some setup first

You need a EmptyInbox key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a EmptyInbox key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
4
Paste this command and press Enter
```
claude mcp add emptyinbox --env EMPTYINBOX_API_KEY=your-value -- npx -y emptyinbox-mcp
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see EmptyInbox listed as connected
Done
Try it
Use EmptyInbox and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using EmptyInbox or shows a EmptyInbox tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

You need a EmptyInbox key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a EmptyInbox key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the EmptyInbox settings, EMPTYINBOX_API_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use EmptyInbox and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using EmptyInbox or shows a EmptyInbox tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

You need a EmptyInbox key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a EmptyInbox key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the EmptyInbox settings, EMPTYINBOX_API_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use EmptyInbox and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using EmptyInbox or shows a EmptyInbox tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use EmptyInbox💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add emptyinbox --env EMPTYINBOX_API_KEY=your-value -- npx -y emptyinbox-mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "emptyinbox": {
      "command": "npx",
      "args": [
        "-y",
        "emptyinbox-mcp"
      ],
      "env": {
        "EMPTYINBOX_API_KEY": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "emptyinbox": {
      "command": "npx",
      "args": [
        "-y",
        "emptyinbox-mcp"
      ],
      "env": {
        "EMPTYINBOX_API_KEY": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "emptyinbox": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "emptyinbox-mcp"
      ],
      "env": {
        "EMPTYINBOX_API_KEY": "your-value"
      }
    }
  }
}

Values you fill in

EMPTYINBOX_API_KEY secret env
Existing EmptyInbox API key. Omit to auto-register a free account on the first tool call that needs one; the key is then written to ~/.emptyinbox.json.

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

At a glance

GitHub stars i: 4 (Stars belong to another repo)
This listing points to someone else’s repo, so its stars are not counted in rankings
Downloads per weeki: 86/wk
Licence i: No licence stated
Connection: Runs on your computer
Transport: stdio
Latest versioni: 1.5.0
Categoryi: Chat & email
Published to registryi: Oct 8, 2026
Code last changedi: Oct 22, 2026
Maker: blockonomics
Packages: npm: emptyinbox-mcp
Repo: blockonomics/emptyinbox-me
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

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 12, 2026

! Caution
Maker matches the repo
The publisher (cnohall) is not the repo owner (blockonomics); someone else may have listed it
✓ Pass
Still maintained
Code last changed 21 days ago
… 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

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Chat & emaili

More stars than 0% of the other 1962 servers in this category
Published to the registry more recently than 43% of the other 1962 servers in this category
Basic checks equal to or better than 10% of the other 1962 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 EmptyInbox safe?

It passed 1 of 2 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?

You need to fill in: EMPTYINBOX_API_KEY

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 21 days ago, and the latest version (1.5.0) reached the registry 34 days 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: Inbox Zero, Agent-Native Chat, draw.io

Alternatives

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

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

Inbox Zero

Search Gmail and Outlook, save drafts, manage email rules, and view email stats.

by elie222Widely used★ 13KUpdated 42 days ago

Runs in the cloud

Install

Agent-Native Chat

Minimal chat-first app with durable threads, actions, and the app-agent loop

by BuilderIOWidely used★ 7.7K Stars for the whole repoUpdated 2 months ago

Runs in the cloud

Install

draw.io

Create draw.io diagrams in chat from Mermaid or XML, shown live and interactive. 10,000+ shapes.

by jgraphWidely used★ 5.8KUpdated yesterday

Runs in the cloud✓ draw.io

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.

emptyinbox-mcp

MCP server for EmptyInbox — create disposable email inboxes and read messages from AI agents.

Listed in the official MCP Registry as io.github.cnohall/emptyinbox.

Setup

Claude Code:

claude mcp add emptyinbox -- npx -y emptyinbox-mcp@latest

Any other MCP client — add to its config:

"mcpServers": { "emptyinbox": { "command": "npx", "args": ["-y", "emptyinbox-mcp@latest"] } } }

No setup: the first tool call that needs an account registers one automatically and saves the key to ~/.emptyinbox.json for future sessions. Starting the server on its own (as MCP hosts do to list tools) creates nothing.

Bring your own account (optional — to reuse an existing key):

"mcpServers": { "emptyinbox": { "command": "npx", "args": ["-y", "emptyinbox-mcp@latest"], "env": { "EMPTYINBOX_API_KEY": "your_api_key_here" } } } }

Get an API key at https://emptyinbox.me/settings.html

Tools

Tool	Description
`create_inbox`	Create a new email address; it expires after 30 days unless kept
`list_inboxes`	List all inboxes on your account
`list_messages`	List received messages, each with its extracted code, action link and text preview
`get_message`	Get one message parsed (code, links, plain text), or `format="text"` for a flat rendering
`wait_for_message`	Block until an email arrives — perfect for signup/OTP flows; returns the extracted code with it
`get_quota`	Credits remaining on the account
`list_bundles`	List quota bundles and prices
`buy_quota`	Quote a Bitcoin payment; returns a `pay_url` for the user plus address, amount and BIP21 URI
`check_payment`	Check whether a payment landed and quota was credited
`keep_inbox`	Make an inbox permanent (30 credits) so it keeps receiving mail, e.g. password resets
`report_issue`	Send a bug, payment problem, docs gap or feature request to the team; never creates an account

Example agent workflow

1. create_inbox → "clever.sunny.butterfly@emptyinbox.me"

[agent signs up to some service using that address]
wait_for_message(inbox="clever.sunny.butterfly@emptyinbox.me", timeout_seconds=60)
→ returns the verification email with code/link

Payment

Every account starts with free inboxes. When they run out, create_inbox returns the prices and the agent can close the purchase without leaving the session:

the agent shows its user the bundles and the user picks one
buy_quota returns a pay_url — a page with a QR code, the exact amount and live status — plus the raw address, amount and BIP21 URI
the user pays from any Bitcoin wallet (or an agent with its own wallet pays the BIP21 URI)
check_payment with wait_seconds confirms the credit, usually within seconds of broadcast

buy_quota takes either a bundle id from list_bundles or a custom whole-dollar usd amount from $1 to $100, for an agent spending down whatever a wallet holds. A custom amount is priced at the best bundle rate it qualifies for. The network fee the payer adds on top is the same whatever the size of the payment, so it eats a far larger share of a dollar-sized top-up.

Quota is granted as soon as the payment is seen on the network, so there is no waiting for confirmations. Humans can also buy at https://emptyinbox.me/inboxes.html

EmptyInbox

Overview

What you can do with it

Install

Install Node.js

Sign up and create a EmptyInbox key

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Sign up and create a EmptyInbox key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Sign up and create a EmptyInbox key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Sign up and create a EmptyInbox key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

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

Discussion

User reviews

Compared with others in Chat & emaili

Common questions

Alternatives

Inbox Zero

Agent-Native Chat

draw.io

README from the maker

emptyinbox-mcp

Setup

Tools

Example agent workflow

Payment