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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1578 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
Laviya

Laviya project management: read and update tasks, wikis, sprints and test cases.

ProductivityCode & DevOps

Requires authOutdated checkNot measured5 / 22
LayerCall

Score an IP, email, phone, domain or device for fraud in one call, with the signals behind it.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
LeadMagic Sheets — AI Spreadsheet with Live Enrichment Columns

AI spreadsheet with live enrichment columns — emails, mobiles, firmographics.

ProductivityFile & docs

Requires authNot measured5 / 22
Letterly

Bring Letterly voice notes and meetings into your AI chat to search, rewrite, translate, and more.

ProductivityData access / search

Requires authOutdated checkNot measured5 / 22
Levirge Brain

Shared MCP memory for AI agents: knowledge base, skills, todos and agent-to-agent handoffs.

ProductivityKnowledge & memory

Requires authOutdated checkNot measured5 / 22
Limitguard Lead Verification

Lead validation over MCP: KVK/KBO register, EU VAT, sanctions and email checks with sources.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Link Crypt

Search, save, tag, and summarize the links in your Link Crypt bookmark library.

ProductivityData access / search

Requires authOutdated checkNot measured5 / 22
ListCheckup

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

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Lockally Email

Stateful email for AI agents: read inboxes, reply in-thread, draft with approval.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Mailbuttons

Governed email for AI agents: a sandbox inbox to read and send from, human approval to go external.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Mailgi

Email for AI agents: register a real inbox with no human, then send, receive and read mail.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Mailly

A real inbox for agents: read mail, draft replies you approve, wait for verification codes.

ProductivityCommunication & messaging

Requires authNot measured5 / 22
MailMask

Email for agents: domains, aliases, IMAP mailboxes, DNS, sending and webhooks via one API key.

ProductivityCommunication & messaging

Requires authNot measured5 / 22
mailmcp

Your mailboxes in ChatGPT and Claude: Gmail, iCloud, Fastmail, any IMAP. Passwords stay yours.

ProductivityCommunication & messaging

Requires authNot measured5 / 22
Mailows

Give AI agents their own email inboxes: list, read and send mail via scoped, revocable OAuth grants.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
MailProbe

Verify email addresses in real time: deliverability, disposable and role addresses, typo fixes.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Mailyond

Read, reply to and send email across every domain you connect to Mailyond, via API key over HTTP.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
MCPEmails

Never-stored live email: read, send and triage Gmail, Outlook / Microsoft 365, or any IMAP mailbox.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
MepMail

Transactional email and agent mailboxes: send, broadcasts, domains, Correio inboxes.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Meridian

Project management (PMO) data for AI: projects, risks, status reports, time tracking.

ProductivityFile & docs

Requires authOutdated checkNot measured5 / 22
Mermail

Privacy-first email inboxes for AI agents with MCP mail tools and Composio connect/execute.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
miniDesk

Work your miniDesk support inbox from AI apps: read conversations, search docs, draft replies.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Mob

An AI-first personal CRM you run in natural language: contacts, reminders, notes, and more.

ProductivityCode & DevOps

Requires authOutdated checkNot measured5 / 22
MoonlyBox MoonLink

Personal knowledge MCP: capture bookmarks, notes & todos by chat; archive pages; search memory.

ProductivityKnowledge & memory

Requires authNot measured5 / 22Not checked yet

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