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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1429 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
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
Counterparts AI Phone

A phone number for your AI: people and their AIs leave messages, your AI reads them to you.

OtherCommunication & messaging

Requires authNot measured4 / 22
Couryo

Transactional email API: send, read delivery timelines, explain bounces, manage domains (OAuth).

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Creator River

Search 1.8M+ YouTube, TikTok and Instagram creators with emails and run outreach from your AI agent.

MediaCommunication & messaging

Requires authOutdated checkNot measured4 / 22
DashaMail

Email marketing for Russian businesses: lists, campaigns, reports, transactional email.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured4 / 22
DayOneLead

Find newly registered businesses, manage prospects, and run approval-gated email outreach.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
DEBYKO

Perp futures data from 22 venues, each value with its time and age; alerts to Telegram or webhooks.

Developer ToolsCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Deeplead

Find local businesses, companies and decision makers with verified emails for B2B outreach.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Derrick

B2B data enrichment: verified work emails, phones, firmographics, tech stack, hiring signals.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
Descovo — B2B contact data

B2B contact data for AI agents: search 700M+ people, reveal work emails. Pay per record.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Deskhand

Deskhand CRM for AI agents: key per agent, undo a run, email drafts. Start with one POST.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
DirectIQ

Manage DirectIQ contacts, lists and tags, see campaign results, and send transactional email.

Marketing & SalesCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Disban

Check if a signup email is disposable, free, an alias, testing, parked or unknown, with evidence.

ProductivityCommunication & messaging

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

Discord community chat platform MCP server: list servers and channels, read channel messages.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured4 / 22
DnsGuard

Check a domain's email authentication: SPF, DKIM, DMARC, BIMI, MX, MTA-STS, TLS-RPT. Score + fixes.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Domailo

Read, search, draft, send and schedule email in your company-domain mailboxes on Domailo.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
DomainCat

Monitor SSL certs (incl. origin behind Cloudflare), domain expiry, DNS, email auth and blacklists.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
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

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