ListCheckup

Name: ListCheckup
Author: damiana-create

by damiana-createversion 1.0.0i★ –iRuns in the cloud

Registry namecom.listcheckup/mcp

Install

Overview

Description from the maker (original English)

Email verification for AI agents: check addresses and lists, priced before credits are spent.

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 in the cloud
Transport: Streamable HTTP
Category: Chat & email
You need to fill in: Authorization

Install

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

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: Authorization

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

Runs in the cloudNothing to install; it connects over the internet

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

This address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

Run this in your terminal

claude mcp add --transport http listcheckup https://listcheckup.com/mcp --header 'Authorization: your-value'

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": {
    "listcheckup": {
      "url": "https://listcheckup.com/mcp",
      "headers": {
        "Authorization": "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": {
    "listcheckup": {
      "type": "http",
      "url": "https://listcheckup.com/mcp",
      "headers": {
        "Authorization": "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 address needs a key in a request header, which the add-connector menu cannot set. Use Claude Code, Cursor or VS Code instead.

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

Values you fill in

Authorization secret required HTTP header
Bearer followed by your ListCheckup API key (lck_live_...)

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

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

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 listcheckup.com (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 checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Chat & emaili

More stars than 0% of the other 1769 servers in this category
Published to the registry more recently than 73% of the other 1769 servers in this category
Basic checks equal to or better than 100% of the other 1769 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 ListCheckup 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?

You need to fill in: Authorization

Does it run on my computer or in the cloud?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 10 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Vexa, emailmd, MCP WhatsApp Cloud

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

Vexa

by Vexa-ai

Meeting bot and transcripts for Google Meet, Teams and Zoom. Live or after, speakers labelled.

Runs in the cloud★ 2,949Apache-2.0Updated 2 months ago

Install

emailmd

by anypost

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

Computer or cloud★ 1,385MITUpdated 31 days ago

Install

MCP WhatsApp Cloud

by codespar

MCP server for WhatsApp Cloud API (Meta) — messages, media, and templates via Graph API

Runs on your computer★ 277MITUpdated 5 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.

ListCheckup MCP server

Email verification for AI assistants. Connect Claude, Cursor or any MCP client to ListCheckup and let it check a single address or a whole list, showing you the price before anything is spent.

Endpoint: https://listcheckup.com/mcp (remote, Streamable HTTP)
Auth: Authorization: Bearer lck_live_... (create a key in your ListCheckup dashboard)
Free tier: 100 checks every month, no card. Catch-all and unknown results are not charged, and credits never expire.
Data: processed on EU servers. Nothing is sent to the addresses being checked.

Tools

Tool	What it does	Cost
`check_email`	Verify one address: valid, invalid, risky, catch-all or unknown, with the reason and a confidence score	1 credit (free if catch-all or unknown)
`get_balance`	Credits left on the account	Free
`create_list`	Submit a list and get its price	Free
`start_list`	Start checking a list you've priced	Spends credits
`get_list`	Status and progress of a list	Free
`get_list_summary`	Counts by status once a list is finished	Free

Pricing and starting are separate tools on purpose: an assistant has to show you what a list will cost before anything is spent, and you can say no. No tool takes an account as an argument; the key in the header decides whose credits are used.

Connect

Claude Code

claude mcp add --transport http listcheckup https://listcheckup.com/mcp \

--header "Authorization: Bearer lck_live_..."

Claude Desktop, Cursor and most other clients

"mcpServers": { "listcheckup": { "url": "https://listcheckup.com/mcp", "headers": { "Authorization": "Bearer lck_live_..." } } } }

Check it works

curl -X POST "https://listcheckup.com/mcp" \

-H "Authorization: Bearer lck_live_..." \ -H "Content-Type: application/json" \ -H "Accept: application/json, text/event-stream" \ -d '{"jsonrpc":"2.0","id":1,"method":"tools/list","params":{}}'

Six tools listed means you're connected.

Example prompts

"Check whether anna@example.com is a real address."
"Here's my leads CSV. How much would it cost to verify it? Don't start until I say so."
"How many credits do I have left?"

Treat the key as a password

Anything holding it can spend your credits. Keep config files with the key out of shared repositories, give each machine its own key, and revoke a key in the dashboard if it leaks. Revoking takes effect immediately.

ListCheckup

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 Chat & emaili

Common questions

Alternatives

Vexa

emailmd

MCP WhatsApp Cloud

README from the maker

ListCheckup MCP server

Tools

Connect

Example prompts

Treat the key as a password

Links