MailerCheck MCP by usefulapi

Name: MailerCheck MCP by usefulapi
Author: m190

by m190version 1.10.1i★ 1 (Stars for the whole repo)iRuns in the cloud

Registry nameio.usefulapi/mailercheck

How to install

What it does

Check MailerCheck credits and lists, and run confirmed asynchronous email verification.

Connects Runs in the cloud
Account or key No key needed
Category Chat & email

Install

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

Passed 4/4 checks · What you ask goes through the maker’s server (mailercheck.usefulapi.io) · ✓ Commands checked Nov 13, 2026

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 · about 2 min

No key, nothing to install · Set it up once on claude.ai or the desktop app, then use it in chat · free accounts can add 1 · on Team/Enterprise an Owner adds it

Open Claude’s Connectors page
CustomizeConnectors
Done
Click “Add” → “Custom” → “Web” and fill in these 2 fields
Copy each value into the field with the same name in Claude, then click Continue
Name · NameMailerCheck MCP by usefulapi
Remote MCP server URL · Addresshttps://mailercheck.usefulapi.io/mcp
Click Continue past the sign-in settings Claude detected · under Authentication choose what the maker says (Sign in now, Sign in when needed or No sign in), then click Add
Done
Turn it on in a chat
+ConnectorsMailerCheck MCP by usefulapi
Done
Try it
Use MailerCheck MCP by usefulapi and tell me what you can do for me, then show me one thing
✓ If Claude says it is using MailerCheck MCP by usefulapi or shows a MailerCheck MCP by usefulapi 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 ChatGPT, depending on your plan

Full MCP: ChatGPT Business, Enterprise or Edu on the web · Pro: connects with read/fetch permissions, so tools that change data may not work · Plus: not confirmed in OpenAI’s docs; if you see an add-custom-MCP option on the Plugins page you can try these steps · web only

Open ChatGPT’s add-MCP page on the web
Plugins+Add custom MCP server
Done
Fill in the name and address
Enter a name, paste the address under Connection, tick the risk warning and click Create as a plugin
Name · NameMailerCheck MCP by usefulapi
Connection · Addresshttps://mailercheck.usefulapi.io/mcp
Done
Pick MailerCheck MCP by usefulapi in a chat
Start a new chat and pick MailerCheck MCP by usefulapi from your plugins before typing
Done
Try it
Use MailerCheck MCP by usefulapi and tell me what you can do for me, then show me one thing
✓ If ChatGPT says it is using MailerCheck MCP by usefulapi or shows a MailerCheck MCP by usefulapi tool in the answer, you are connected

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

Works with Claude Code · about 2 min

No key, nothing to install

Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done

Paste this command and press Enter

claude mcp add --transport http --scope user mailercheck https://mailercheck.usefulapi.io/mcp

Done

Type /mcp in Claude Code
You should see MailerCheck MCP by usefulapi listed as connected
Done
Try it
Use MailerCheck MCP by usefulapi and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using MailerCheck MCP by usefulapi or shows a MailerCheck MCP by usefulapi 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 · about 2 min

No key, nothing to install

Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use MailerCheck MCP by usefulapi and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using MailerCheck MCP by usefulapi or shows a MailerCheck MCP by usefulapi 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 · about 2 min

No key, nothing to install

Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use MailerCheck MCP by usefulapi and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using MailerCheck MCP by usefulapi or shows a MailerCheck MCP by usefulapi 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 →

Address for apps that connect over the web

Addresshttps://mailercheck.usefulapi.io/mcp

JSON settings are under “For developers” below

Stuck? Ask people who use MailerCheck MCP by usefulapi💬 Discussion →

For developers: Terminal commands and JSON settings

Over the web

Claude Code

claude mcp add --transport http --scope user mailercheck https://mailercheck.usefulapi.io/mcp

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "mailercheck": {
      "url": "https://mailercheck.usefulapi.io/mcp"
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "mailercheck": {
      "type": "http",
      "url": "https://mailercheck.usefulapi.io/mcp"
    }
  }
}

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

At a glance

GitHub stars i: 1 (Stars for the whole repo)
This repo holds several MCP listings; its stars count once in rankings
Downloads per weeki: Not on npm/PyPI
Verified domain: ✓ usefulapi.io
Licence i: MIT
Connection: Runs in the cloud
Transport: streamable-http
Latest versioni: 1.10.1
Categoryi: Chat & email
Published to registryi: Nov 13, 2026
Code last changedi: Nov 13, 2026
Maker: m190
Repo: m190/usefulapi-mcp
Website: usefulapi.io
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.

Connect over the internet in

Claude ChatGPT 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 Open WebUI Raycast

All apps, with pros and cons →

What it can do

Tool names and descriptions exactly as the server reported them on Nov 9, 2026. The maker wrote them, not us; we show them as plain text.

mailercheck_account
Read the connected MailerCheck account name, ID and credit balance. Does not verify emails or spend verification credits.
mailercheck_credits
Read the available MailerCheck verification credit balance without starting verification.
mailercheck_lists
Read one bounded page of list summaries, processing status and statistics. Does not create, verify or delete lists. Pagination stays on the MailerCheck API; no response links are followed.
mailercheck_get_list
Read one existing list's verification status and aggregate result counts. Does not start or restart verification.
mailercheck_verify_email
Submit one email for asynchronous verification. Spends MailerCheck credits and requires confirm:true. This call is never retried. Read the returned verification ID with mailercheck_verification_result; wait between polls. If the response is lost, check MailerCheck before submitti
mailercheck_verification_result
Read the status and result of a previously submitted asynchronous email check. Does not start new verification. Call once and wait before polling again; no automatic polling is performed.

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 13, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain usefulapi.io (the registry checks domain ownership)
✓ Pass
Still maintained
Code last changed today
– Not applicable
Has a licence
Not applicable: a cloud server run by the owner of usefulapi.io; you don't run code from the repo
✓ Pass
Endpoint responds
Responded in 14 ms (HTTP 200)
– Not applicable
Sign-in with OAuth
No sign-in needed
✓ Pass
No hidden instructions in tool descriptions
Read 6 tool descriptions and found no hidden instructions to the AI

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 2017 servers in this category
Published to the registry more recently than 98% of the other 2017 servers in this category
Basic checks equal to or better than 100% of the other 2017 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 MailerCheck MCP by usefulapi safe?

It passed 4 of 4 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 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 today, and the latest version (1.10.1) reached the registry today.

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 on the web (full MCP on Business and above; Pro read-only).

What can I use instead?

In the same category: Inbox Zero, draw.io, TradingMCP

Others in the same category

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

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by elie222Widely used★ 13KUpdated 43 days ago

Runs in the cloud

How to connect

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

by jgraphWidely used★ 5.8KUpdated 3 days ago

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How to connect

TradingMCP

Market analysis for AI assistants: screeners, multi-timeframe analysis, backtests, in-chat charts.

by atilaahmettanerWidely used★ 5.3KUpdated 22 days ago

Runs in the cloud

How to connect

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.

MailerCheck MCP by usefulapi

https://mailercheck.usefulapi.io/mcp

Connect

Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://mailercheck.usefulapi.io/mcp.
Claude Code: claude mcp add --transport http mailercheck https://mailercheck.usefulapi.io/mcp, then run /mcp to log in.
VS Code: Add to VS Code.
Cursor and other clients: add the URL as a remote MCP server:

"mcpServers": { "mailercheck": { "url": "https://mailercheck.usefulapi.io/mcp" } } }

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your MailerCheck credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/mailercheck/

Connect your own MailerCheck credentials through the hosted sign-in page.

Tools

Tool	Type	What it does
`mailercheck_account`	read	Read MailerCheck account
`mailercheck_credits`	read	Check MailerCheck credits
`mailercheck_lists`	read	List MailerCheck verification lists
`mailercheck_get_list`	read	Read MailerCheck list status
`mailercheck_verify_email`	write	Start MailerCheck email verification
`mailercheck_verification_result`	read	Read MailerCheck email verification result
`mailercheck_usage_status`	meta	Usage status (free-tier meter)
`mailercheck_request_feature`	meta	Request a missing feature
`mailercheck_upgrade`	meta	Upgrade to Pro or Pro+
`mailercheck_cancel_subscription`	meta	Cancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Pro (per user)	$9/mo or $90/yr (2 months free)	Unlimited*

\*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to support@usefulapi.io.

Pro covers this server only. Subscribe with mailercheck_upgrade (it returns a Stripe Checkout link). Cancel any time with mailercheck_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running mailercheck_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

License

MIT

MailerCheck MCP by usefulapi

What it does

Install

Open Claude’s Connectors page

Click “Add” → “Custom” → “Web” and fill in these 2 fields

Turn it on in a chat

Try it

Open ChatGPT’s add-MCP page on the web

Fill in the name and address

Pick MailerCheck MCP by usefulapi in a chat

Try it

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Click this button to open Cursor

Open the AI chat in Cursor in Agent mode

Try it

Click this button to open VS Code

Open the AI chat in VS Code in Agent mode

Try it

Over the web

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

Others in the same category

Inbox Zero

draw.io

TradingMCP

README from the maker

MailerCheck MCP by usefulapi

Connect

Tools

Pricing

License