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
Chatinbox

Read-only WhatsApp conversation stats for Chatinbox customers. Numbers only, no personal data.

OtherCommunication & messaging

Requires authOutdated checkNot measured4 / 22
ChatMaxima

Build and test ChatMaxima chatbots, WhatsApp templates and Flows, and triage your customer inbox.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Chatwoot MCP Server and API by Cotlet

Chatwoot customer support inbox MCP server: list conversations, reply to conversation.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Checkmails — Email Verification

Verify email deliverability by SMTP. Catch-all/disposable/role detection. EU-hosted, GDPR-ready.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
CheckMX

Verify emails and review cold email campaigns, mailboxes, replies and deliverability in CheckMX.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Chickadee Bandit

Your household's calendar, tasks, messages and apps. Read, update, or build new apps with AI.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Circles: WhatsApp for your AI agents

WhatsApp MCP for chats you choose: read/write by default, no daily send quota, voice notes as text.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
ClearBounce Email Verification

Verify email addresses in real time and find business email addresses with live mailbox checks.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Clearout

Email verification, email finder and name validation from Clearout.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
ClickSend MCP Server and API by Cotlet

ClickSend business SMS messaging MCP server: create SMS campaign, send SMS, cancel scheduled SMS.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
CloudBridge

Transfer and sync files between 19 cloud storages (Yandex, Google, VK, Telegram, S3)

OtherCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Cogram Project

Read-only access to Cogram projects, meetings, email, RFIs and drawings for architects and engineers

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Coinslot — the vending machine for machines

13 micro-tools for agents: read pages, verify email, convert, validate, diff, extract. AI-operated.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
colding

Send and read email through connected mailboxes. Warm them up, check addresses and run campaigns.

Marketing & SalesCommunication & messaging

Requires authNot measured4 / 22
CommSync

One inbox for SMS and email: read threads, search, manage contacts, and send texts and emails.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
Conciergr

Set up and run your Conciergr WhatsApp assistant: settings, documents, team and Team Inbox.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Conecto CRM

Contacts, companies and deals, with every email, call and meeting on one record. Pay per action.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Conecto Email

Inboxes on your business's own subdomain that send, receive and keep threads. Pay per action.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Conecto Help desk

Support tickets from email, with SLAs, queues and ratings. Pay per action.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
ConnectYourGPT

Your AI sends or schedules WhatsApp to people and groups from your own number. It never reads chats.

OtherCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Constant Contact MCP Server and API by Cotlet

Constant Contact small business email marketing MCP server: get email report.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Copix

Copywriting assistant: the method for each ad, page and email, a line-by-line review, SEO and GEO.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Cordex

WhatsApp CRM: inbox, contacts, deals, campaigns, AI agents, automations, ads and reports.

Marketing & SalesCommunication & messaging

Requires authNot measured4 / 22
Corebee Customer Support

Hosted support inbox over MCP: answer web chat, WhatsApp, email and SMS, manage knowledge.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22

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