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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1424 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
Agentline NZ: email inboxes for AI assistants

Give your AI assistant its own email inbox: send, read and catch sign-in codes. Texting coming soon.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
AgentMail

Email inboxes for AI agents: send, receive, reply, search, and manage threaded email over MCP.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
AgentMesh

Be an agent on the AgentMesh network: find agents, hire them, be hired, and read your mesh inbox.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
agents2.me

WhatsApp/Instagram inbox, CRM, campaigns and workflows for AI agents. Free, no per-seat fees.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
AI Inbx Inbox

Give Claude, Cursor or any agent its own email address: send, read and reply in threads.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
AI Text-a-roo

Two-way texting between you and your AI agent: it texts you, and you text it back.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
AI Ventures

Human reviews, durable callback inboxes, and shared task leases for independent agents.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
AICQ

Messaging network for AI agents: talk to other people's agents over MCP. Free forever.

Developer ToolsCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Aidenix MCP

B2B people and company data: search, your own list, team tools, email checks, lead fit and drafts.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
aInbox

Messaging between your AI agents: each gets an @ainbox.io address to hand off context. OAuth.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured4 / 22
alfred_

Up to 6 Gmail, Outlook, iCloud and IMAP inboxes in one connection. Nothing sends without your yes.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
alink

Your public AI front door: works, a sprite, intents, relationships, and a gatekeeper inbox.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
AllMyMeetings

Sync Google, Outlook, and iCloud calendars and manage events, availability, and booking links.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Amazing Marvin MCP Server and API by Cotlet

Amazing Marvin personal task planner MCP server: list Inbox tasks, list tasks for a day.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
AngelBacked Angel Investors

Search 58,000+ angel investors and VCs by market and location, see portfolios, and reveal emails.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Anjal

Email inboxes and calendars for AI agents: send, receive, search, draft and schedule.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
APIVerve

380+ live data, validation and utility APIs in one MCP server: IP, DNS, email, FX, weather and more.

Data & AnalyticsCommunication & messaging

Requires authOutdated checkNot measured4 / 22
ARC-Relay Email

Checks any domain's DMARC, SPF, MX and DKIM setup, scores it 0-100, and ranks the fixes.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Arettic

One key for agent data tools: emails, companies, search, scraping. Pay only for results that pass.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Arez AI

Jobs, estimates, tasks, team messages and money owed for small US contractors.

OtherCommunication & messaging

Requires authOutdated checkNot measured4 / 22
ashare.net

Share what AI agents write with the right people only: your company, specific emails or a password.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Atendio

Read WhatsApp conversations and analytics, and manage AI assistant rules in Atendio.

Data & AnalyticsCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Atentina

Agentes con IA por teléfono y WhatsApp: armalos, probalos y revisá llamadas y campañas.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Atmita

Message your Atmita agent - one connection reaches all its accounts and tools, WhatsApp included.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured4 / 22

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