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
Couryo free email tools

Free, no login: verify an email address, check SPF/DKIM/DMARC, explain SMTP errors, build SPF/DMARC.

ProductivityCommunication & messaging

Outdated check365 ms12 / 22
DiviMail

Give your AI agent its own email address: send, receive and read email. $0.01 USDC per send.

ProductivityCommunication & messaging

Outdated check379 ms12 / 22
CRM Yazılımları

CRM rehberi: satış hattı, WhatsApp ve e-ticaret entegrasyonu, hazır CRM ile özel geliştirme kararı.

Marketing & SalesCommunication & messaging

Outdated check387 ms12 / 22
io.github.robertoyanguas-ops/company-enrich-mcp

Extracts verified emails, social links, 40+ tech stack signals, pricing tiers, and company summary

Developer ToolsCommunication & messaging

Responded403 ms12 / 22
io.github.robertoyanguas-ops/prompt-guard-mcp

Scans untrusted web pages, emails, or tool outputs for prompt injections and returns sanitized tex

Developer ToolsCommunication & messaging

Responded405 ms12 / 22
ClickPhone

Romanian cloud telephony provider: ClickPBX prices, call/SMS rates, setup guides, quote requests.

ProductivityCommunication & messaging

Responded413 ms12 / 22
MailByGet

Temporary receive-only email inboxes for agents. Create, list and read messages without signup.

ProductivityCommunication & messaging

Outdated check415 ms12 / 22
Cognita

Passive OSINT and security recon: DNS, TLS, email posture, IP reputation, CVE/KEV, CT logs.

ProductivityCommunication & messaging

Outdated check434 ms12 / 22
AutoMessage

Find a texting assistant for your goals in AutoMessage's public catalog.

OtherCommunication & messaging

Outdated check435 ms12 / 22
disdex: Discord server search

Find public Discord servers by topic, language and size, check invite links, see member growth.

OtherCommunication & messaging

Outdated check441 ms12 / 22
EmailVerify by Techforce Global

Verify email addresses: syntax, MX, disposable, role, SMTP mailbox, catch-all and typo checks.

ProductivityCommunication & messaging

Outdated check449 ms12 / 22
Agent Provider Depot

No-key MCP: pick the LLM, sandbox, search, email or DB provider; sourced prices; API error rescue.

ProductivityCommunication & messaging

Outdated check456 ms12 / 22
io.github.robertoyanguas-ops/email-verify-mcp

Validates email syntax, disposable/burner provider status, role accounts, and live DNS records.

Developer ToolsCommunication & messaging

Responded463 ms12 / 22
Le Confidant

Statistics from your own WhatsApp chat analysis as numbers only, plus free WhatsApp text tools.

Data & AnalyticsCommunication & messaging

Outdated check474 ms12 / 22
dev.emailiq/email-intelligence

Email intelligence MCP: MX/SPF/DKIM/DMARC, score, enrichment. x402 on emailiq.dev/mcp.

ProductivityCommunication & messaging

Responded482 ms12 / 22
BeingSo Animated Cards

Search, personalize, publish, share, and email animated greeting cards from BeingSo.

ProductivityCommunication & messaging

Outdated check487 ms12 / 22
StartupHub.ai

Funding rounds, AI startup and investor search, email discovery, agent-readiness. No API key.

ProductivityCommunication & messaging

Outdated check487 ms12 / 22
emailmd

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

ProductivityCommunication & messaging

Responded494 ms12 / 22
io.github.wilmendezofficial/postari

Email marketing y transaccional AI-native: campañas, correos 1-a-1, contactos, flujos y métricas.

Marketing & SalesCommunication & messaging

Outdated check529 ms12 / 22
Com.Bot

Facts about Com.Bot, the WhatsApp Business API platform: plans, channels and site search.

OtherCommunication & messaging

Outdated check531 ms12 / 22
io.inboxguard/email-deliverability

Scan and fix a domain's email deliverability (SPF, DKIM, DMARC, MTA-STS, BIMI, DNS blocklists).

ProductivityCommunication & messaging

Responded534 ms12 / 22
SpamFixer Email Deliverability Check

Why do a domain's emails go to spam? Checks SPF, DKIM, DMARC, MX and blocklists. Free, no login.

ProductivityCommunication & messaging

Outdated check541 ms12 / 22
Cosend

WhatsApp Business inbox: chats, contacts, templates, campaigns, automations and AI receptionist.

Marketing & SalesCommunication & messaging

Outdated check562 ms12 / 22
Telegram Agent by Nova (CIVAI)

I use your linked Telegram MTProto session (Integrations → Telegram) to list groups, members, and s…

Developer ToolsCommunication & messaging

Outdated check583 ms12 / 22

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