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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2933 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
Living Docs

Create and improve live, shared interactive documents with your agent.

Developer ToolsFile & docs

Requires authOutdated checkNot measured5 / 22
LLM Data Guard: PII & Secrets Redaction

Detect and redact PII and secrets (API keys, tokens) in text, HTML or PDF before it reaches an LLM.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
LLMtoMD

Convert PDFs, Office docs, websites and audio into AI-ready Markdown, then search and ask your docs.

MediaFile & docs

Requires authOutdated checkNot measured5 / 22
Lockally Email

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

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
LockIn

A notebook your coding agents write to: notes that track the code's commit, and handoffs.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
LookupLab

Phone carrier, email domain, IP network and DNS checks using your LookupLab account.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Luma Events Scraper (Apify) - lu.ma events by city, category or calendar

Luma (lu.ma) events as JSON by city, category or calendar: date, venue, hosts, tickets. $1.50/1k

Developer ToolsBrowser & web scraping

Requires authNot measured5 / 22Not checked yet
Lumail

Official Lumail email marketing MCP for campaigns, subscribers, and workflows.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured5 / 22
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
Mailcannon

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

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Mailercloud

AI tools for Mailercloud email marketing: campaigns, contacts, templates, sending & analytics.

Marketing & SalesCommunication & 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
MailMask

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

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
Mailtea

Send email and newsletters with Mailtea over MCP, plus skills for email and website design.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured5 / 22
MAILTYPE — Email Domain Capability Intelligence

Email-domain intelligence: MX capability, provider, disposable status, SPF, DMARC, and MTA-STS.

Developer ToolsCommunication & 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
Mailzzy

Email marketing: campaigns, audiences, contacts, segments, templates and reports.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured5 / 22
MAJR Dispatch

Turn a raw dev log (commit subjects, PR titles) into customer-facing release notes Markdown.

Developer ToolsFile & docs

Requires authNot measured5 / 22Not checked yet
ManaWG

Shared-flat app ManaWG: expenses, cleaning rota, shopping list, calendar and chat for agents.

E-commerceData access / search

Requires authOutdated checkNot measured5 / 22
Mandala Computer

Cloud desktops for AI agents: create a Linux computer, see its screen, click, type and run tasks.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
Matryoshka Mind Map

Read and write your Matryoshka Mind Map (nested mind map / TODO app) from AI agents.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
MCPEmails

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

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22

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