Mailcannon MCP Server

by ainaluc Your server? Claim it

not responding

Mailcannon is listed as active in the registry but did not answer our last check. It exposes 34 tools. Last commit 12 Aug 2026.

AI-powered email outreach platform — send campaigns with deliverability tracking.

Uptime history 91 days of history · worst day 0%

91 days agonow

0.0%

Uptime 24h

0 of 91 checks

Tools

read from the server

130 ms

Response time

average over 24h

Stars

last commit 12 Aug 2026

What the code does

We read the source, 6 d ago · tools taken from the live server · rules 995398eba69f

Capabilities

What this server is able to do. For an MCP server this is often the job itself — a terminal server runs commands because that is what it is for. Listed so you know what you are plugging in, not as an accusation.

Runs an external command src/mcp-client.ts:310

    const proc = spawn(config.command!, config.args ?? [], {

Page executes code built at runtime public/app.html:518

      tbody.innerHTML = contacts.map(function(c) {

Is this your server and something here is wrong? Tell us — corrections are free and do not require a plan.

This code can reach further than it looks

We found places where it runs commands, builds paths or queries from values it is given. None of that is a flaw by itself — it becomes one when the code changes, and code changes quietly between releases. We re-read it on every one.

Connect this server

Endpoint below is the one we actually reach during checks — not the one copied from a README. Last verified 3 min ago.

Claude Code Claude Desktop Codex Cursor VS Code

run in your terminal

claude mcp add mailcannon --transport http https://www.thinkandautomate.dev/api/mcp

Settings → Connectors → Add custom connector, then paste this address

https://www.thinkandautomate.dev/api/mcp

~/.codex/config.toml

[mcp_servers.mailcannon]
url = "https://www.thinkandautomate.dev/api/mcp"

.cursor/mcp.json

{
  "mcpServers": {
    "mailcannon": {
      "url": "https://www.thinkandautomate.dev/api/mcp"
    }
  }
}

.vscode/mcp.json

{
  "servers": {
    "mailcannon": {
      "type": "http",
      "url": "https://www.thinkandautomate.dev/api/mcp"
    }
  }
}

Available tools 34

Read directly from the server with tools/list, grouped by what they act on. If a tool disappears, we record the date.

campaign

add_campaign_step

Add a sequence step (delay in hours, subject, body)

create_campaign

Create a new email campaign

delete_campaign

Delete a campaign and all its steps

delete_campaign_step

Delete a step from a campaign

update_campaign

Update a campaign's name

update_campaign_step

Update a campaign step's day, subject, or body

contact

add_contact

Add a single contact

remove_contact

Remove a contact by ID

update_contact_tags

Set tags on a contact (replaces all tags)

task

create_task

Create a new task

delete_task

Delete a task by ID

update_task

Update a task's status, priority, or fields

contacts

add_contacts

Bulk add contacts (max 100)

list_contacts

List all contacts

provider

add_provider

Add an email provider

remove_provider

Remove a provider by ID

setting

get_setting

Get a user setting (e.g. timezone)

set_setting

Set a user setting (e.g. timezone to 'America/New_York')

campaigns

list_campaigns

List all campaigns with their steps

deliverability

get_deliverability

Get deliverability stats (sent, opens, bounces, replies)

domain

check_domain_deliverability

Check SPF, DKIM, DMARC records for a domain

check_email_spam_score

Analyze email subject/body for spam trigger words

pause

pause_campaign

Pause a campaign — stops processing all active schedules for this campaign

process

process_campaigns

Process all due campaign schedules (includeFailed: true to retry failed ones)

providers

list_providers

List all email providers

resume

resume_campaign

Resume a paused campaign — reactivates all paused schedules

retry

retry_failed

Reset all failed schedules to active for retry

schedule

schedule_campaign

Assign contacts to a campaign and schedule it

schedules

list_schedules

List all scheduled campaign runs

send

send_test_email

Send a test email to yourself to preview formatting

settings

list_settings

List all user settings

step

check_step_spam_score

Check a campaign step's subject and body for spam triggers

Endpoints

URL	Transport	State	Latency	Checked
https://www.thinkandautomate.dev/api/mcp	streamable-http	answering	130 ms	3 min ago

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Mailcannon — questions

Answers built from our own checks of this server.

What can Mailcannon do?

It exposes 34 tools, read directly from the server on our last check. Among them: add_campaign_step, add_contact, add_contacts, add_provider, check_domain_deliverability, check_email_spam_score and 28 more. The full list with descriptions is on this page — we take it from the server itself via tools/list, not from a README. How MCP servers expose tools in the first place →

What is Mailcannon mostly used for?

Its tools cluster around campaign, contact and task. That is what this server is built to work with — the grouping comes from the actual tool names, not from a category we assigned.

Is Mailcannon working right now?

We send a real MCP handshake every 15 minutes. Over the last 24 hours 0 of 91 checks got a reply (0.0%), average response time 130 ms. The bar chart above shows every period we have measured.

The registry lists Mailcannon as active — why does it not respond?

The official MCP registry stores what the author submitted; it does not verify that the server still runs. We check the endpoint ourselves, and this one does not answer. Catalogues that copy the registry without checking will show it as working.

How do I connect Mailcannon?

Copy the ready config from this page. We generate it for Claude Code, Claude Desktop, Codex, Cursor and VS Code, each in the form that client actually reads. It is a remote server, so there is nothing to install — the client connects to the address.

Does Mailcannon need an API key?

No. Mailcannon completed a full MCP handshake with us as an anonymous client and listed its tools without asking for anything. All 34 of them are readable on this page. This is what we observed, not what the docs claim.

Is Mailcannon open source?

We cannot say either way: written in TypeScript and 0 stars on GitHub, but we could not determine the licence, and without one the code is not open source by default.