MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

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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
WABRA — WhatsApp Business for Brazil

WhatsApp Business + CNPJ enrichment (71M RFB) for Brazilian AI workflows.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Wagent

WhatsApp MCP server with per-chat permissions. Agents see only chats you allow; sends wait for you.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Warm Inbox

Email warm-up for AI builders: check deliverability, connect mailboxes, pause or tune warm-ups.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Warmerly

Cold email outreach: find leads, launch campaigns, fix deliverability, answer replies.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured5 / 22
WasapFlow Bridge

Official WhatsApp Business API for your own CRM or SaaS: docs, numbers, messages, webhooks.

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Wati

Manage Wati WhatsApp and Instagram contacts, chats, campaigns and templates, plus Astra AI agents.

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22
Web Content & URL Tools

26 tools: web pages to Markdown, metadata, tech stack, SSL, SEO, domains, email auth and SSO checks.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
webhooks.cc

Capture, inspect, send and assert on webhooks and inbound email from your coding agent.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
WebKit

Email validation, link previews and article-to-Markdown extraction for AI agents

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Website Contact & Company Enricher

Domain to public business contacts: role emails, phones, socials, company name and address.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Website Contact Company Extractor

Verified company website contact extraction via MCP — emails, phones, socials, confidence scoring.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Website Tech Stack Lookup

Domains in, tech stack out: 7,600+ technologies, versions, DNS/email providers. $0.003/site.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
WhatsApp Business API by Wassenger

Send and read WhatsApp messages, templates, chats and campaigns through the official Business API.

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22Not checked yet
WhatsApp MCP by TimelinesAI

Ask questions across your WhatsApp inbox from Claude, ChatGPT, Cursor or any MCP client.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
WhoisXML API MCP Server

35 WHOIS, DNS, IP, threat intelligence, email, and bulk tools for AI agents via WhoisXML API.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22
Wiggle

Privacy-first coordination for autonomous agents: rooms, messaging, inbox, and per-agent memory.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Winnr

Cold email infrastructure: buy domains, create SMTP mailboxes, set DNS, run warming, read mail.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Wrenfield Company Data

Verified company lookup: name to domain, domain or email to company, firmographics, tech stack.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
WSENDER

Manage WhatsApp, Telegram and MAX mailings: audiences, drafts, moderation and sending.

OtherCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Yo

Let agents send content-free push notifications to a paired phone via MCP.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
YouTube Transcripts & Creator Data

YouTube transcripts, channel transcripts, comments and public creator business emails.

MediaCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Zebu Data - Local Business Leads

Find local businesses on Google Maps, Yellow Pages and Yelp, then pull emails and phones from sites.

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Zenod — the AI librarian of your memory

Keeps your memory: WhatsApp, voice or any AI tool over MCP, Markdown you own, recall with sources

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
ZiggsAI

Lets your assistant work with the people and agents in your Ziggs workspaces: inbox, chats, tasks.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22

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