MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

DiscoveryServer directory

Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

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1439 servers

Ordered by checks passedClear filters
Dated server measurements. The status describes the last probe or a listed authentication requirement. Checks that have not been measured are not failures. Open a server to inspect the evidence.
Server / capabilityLast probeMedian latencyChecks passedLast checked
Mails.ai — Agent Email

A real inbox for AI agents: send, receive and thread email, behind a prompt-injection firewall.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
Mailshake MCP Server and API by Cotlet

Mailshake cold email sales outreach MCP server: list campaigns, add recipients to a campaign.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
MailSlurp

Email and SMS inboxes for AI agents, plus email rendering, inbox placement and sender warmup.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
mailsocket

Test inboxes for AI agents testing your app: block until the OTP or magic link arrives.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Mailsuite

Email tracking for AI assistants: see who opened your emails and send tracked emails and follow-ups.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
MailTester Email Verification

Verify emails (valid/invalid/risky/unknown): MX, SMTP, catch-all, disposable. Free agent key.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
MailTester Ninja

Verify email addresses live against their mail server and find work emails. Nothing stored.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
MailValid Email Verification

Verify emails: syntax, MX, SMTP mailbox, disposable, role and catch-all checks. Single and bulk.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Mailvett: Email Validation API for AI Agents

Mailvett: validate emails. MX, provider, disposable/role/free flags, typo fix, verdict.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
MajlisDesk: WhatsApp shared inbox

Read and answer your team's WhatsApp and email inbox from Claude or ChatGPT. OAuth sign-in.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
MapsData

Build lead lists from Google Maps: businesses with emails, phones and websites, US/CA/UK/AU.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
marginal

Email A/B tests for AI agents: subject lines, managed sends, open/click tracking, and results.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Maylee

Maylee AI email: read, search, triage, draft and send; manage labels, views and AI label rules.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
Meerlume

Build and run booking chat bots for WhatsApp, Instagram, Messenger, Telegram and your website.

OtherCommunication & messaging

Requires authNot measured4 / 22
Meisa

Manage contacts, templates, sequences and broadcasts in your Meisa email account from chat.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Mentorship Boss

Run an Instagram funnel from chat: comment-to-DM, email and text follow-ups, posting, booking calls.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
MentorStack

Employee mentoring software. Goals, meetings, messages and surveys from your AI assistant.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
MewCP

One gateway, every app: Gmail, GitHub, Notion and more. Connect once, call any tool. Managed auth.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
MockClip

Fake chat videos (WhatsApp, iMessage, ChatGPT…) exported as MP4, GIF or transparent WebM / MOV.

MediaCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Modly Discord Server Management

Scoped Discord module settings, XP leaderboards and moderation history for Modly communities.

OtherCommunication & messaging

Requires authNot measured4 / 22Not checked yet
muro - Live Chat & AI Support Inbox

Live chat + AI support inbox: list, triage, and reply to customer conversations; configure widgets.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
MyClawn Computer

Your own cloud computer run by an AI agent: signed-in browser, its own email, files, long jobs.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
namailu.cz Agent Email

namailu.cz gives your AI agent its own email inbox: read and send mail over MCP, with OAuth.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Nameclick: Email Finder & Lookup Tool

Email finder and enrichment: LinkedIn, GitHub, or a person's name on any page, X and YouTube too.

MediaCommunication & messaging

Requires authNot measured4 / 22Not checked yet

Automated measurements. Not a rating. Unmeasured checks are not failures. How to read the evidence