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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1431 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
DomainDNA

Tech stack, email security (SPF, DMARC, MX provider) and domain age API + MCP. 25 free domains/day.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
DomainRef - domain and email security check

Pay-per-call domain and email security check: SPF, DKIM, DMARC, TLS, DNSSEC, BIMI, with exact fixes.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
DomainSpace

Register .si domains, manage DNS, and give your AI agent an email inbox on your own domain.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
DOS AI

Run WhatsApp, Instagram and Telegram AI assistants: projects, prompts, leads, chats, analytics.

Marketing & SalesCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Dovemails

Email inboxes for AI agents: send, wait for mail, reply in thread, forward and label.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
DripRaven WhatsApp campaigns

Run WhatsApp Business campaigns from any AI assistant: contacts, segments, and broadcasts.

Marketing & SalesCommunication & messaging

Requires authNot measured4 / 22
DropAgent

Ringless voicemail and SMS follow-up for AI agents, with consent checks and confirmed bulk sends.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Easy Email Verification

Verify email addresses before you send: single, batch (50) and bulk lists (10,000).

ProductivityCommunication & messaging

Requires authNot measured4 / 22
EasyWeek Business

Manage an EasyWeek business from AI: bookings, availability, customers, services, orders, messaging.

OtherCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Email Got Simplified

Read, search and draft email; nothing is sent until you confirm.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Email Parser Got Simplified

Clean up an email: strip signatures and quoted replies, and summarize what is left.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Email-Ops

Mailbox threads; drafts wait for a person. Authenticated; OAuth 2.1 via Keycloak.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
email-validation.org email validation

Validate emails and run bulk jobs: status, reason and action for each address. Unknown is free.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Emailchaser

Run cold email outbound from an AI agent: campaigns, leads, replies, sender accounts, autopilot.

Marketing & SalesCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Emaillistchecker.io Email Verification

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

ProductivityCommunication & messaging

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

EmailOctopus email newsletter marketing MCP server: list campaigns, get campaign report.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Endlss

Manage Endlss ambassador programs: sellers, offers, invites, messaging, and analytics.

Data & AnalyticsCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Enhanciar — company brain

Ask your company's Slack, Gmail, Drive, Notion, Jira and code from any MCP client, with sources.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Envloped

Send transactional email, verify domains, build contact segments, and draft marketing campaigns.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Eusend

Send transactional email and manage domains, audiences, and broadcasts from any MCP client.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
fabricatedemail

Disposable email addresses for tests and agents: register, wait for mail, extract codes and links.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Famelab: LinkedIn AI agents

LinkedIn AI agents for B2B: leads, inbox, draft replies, campaigns and posts. You approve each send.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Felku Connect

WhatsApp and Telegram for AI agents, behind a policy gateway. OAuth or access key.

Developer ToolsCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Fiber AI

Search companies, enrich contacts, and reveal emails and phones from your AI agent.

ProductivityCommunication & messaging

Not measuredNot measured4 / 22

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