MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

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.

Connect your agent

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
PushNotif Official MCP Server

Web Push (VAPID), Android (FCM), iOS (APNs), In-App Popup, Toast & Transactional Email OTP engine.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Quackr

Virtual phone numbers for SMS verification, OTP receipt, and number management.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Raechly

Run cold email from your agent: mailboxes, warmup, campaigns, contacts, replies and deals.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Ray notifications

Send email, push, Slack, Discord, Telegram and webhook notifications and manage templates with Ray.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Razi Text Generation

Text generation over MCP: prose, emails, blog outlines, SQL, humanizing, text diffs, fake data.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Ready APIs

135 MCP tools: geo, email, phone, company, DNS, FX, equities, weather, tax, econ, intel — one key.

Data & AnalyticsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Relay

Turn GitHub pushes into plain-English client update emails. Map repos to clients and review digests.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Resent

Transactional email for AI agents: templates, domain verify, and sends.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22
Revdoku

Cloud storage with email-receiving buckets. Store and share files with people and AI agents.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Rimbra

Deploy apps, run databases and domains, read logs, and send email and WhatsApp messages on Rimbra.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Robbclan

Draft onboarding training and project plans; review Slack suggestions with tenant-scoped MCP.

Real Estate & PropertyCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Rock's Apify Utility Actors

Seven pay-per-event Apify Actors (PDF/CSV/links/sitemap/email/phone/VAT) as MCP tools.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
RunStack Checks

External checks of TLS, HTTP, email domain, DNS, ports, blocklists and domain expiry

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
RuSender

Manage email campaigns, contacts and deliverability analytics in RuSender from an AI assistant.

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22
SamDesk Support

Read your SamDesk support inbox, find customer agreements and draft replies. Read-only.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22
Samva MCP

Authenticated Samva email and WhatsApp tools, including public documentation and template discovery.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Scalelist

Find B2B leads with verified work emails and mobile numbers from your AI assistant.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Scamchecker.nl

Check a suspicious email, SMS, WhatsApp message or link for scam signals (Netherlands, Belgium).

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Scrapemint Lead Data

Company enrichment, email finding, tech stack, new store leads, press requests and bid notices

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Scribe Mail

Email signature management finally simple and measurable. Built for teams & AI agents.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Sellfy MCP Server

Run your Sellfy store from your AI assistant: products, discounts, orders, sales and email drafts.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
send0

Email inboxes for AI agents: create an address, wait for codes and links, send and reply in threads.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
SenderKit

Build and send email, SMS, and push straight from your AI agent.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
SendFast

Agent-native marketing email: draft, edit, screenshot, and send from your verified domain.

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22Not checked yet

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