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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2933 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
Shipmail

Modern email for your business. Inboxes, calendars, newsletters and an API for your agents.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
SideQuest

Hire verified local people for real-world tasks. Paid upfront, released on approved photo proof.

MediaCode & DevOps

Requires authNot measured5 / 22Not checked yet
Simplepush

Send tasks and notifications to people's phones. Answers build a queryable knowledge base.

Developer ToolsKnowledge & memory

Requires authNot measured5 / 22
SimpleVerifier

Verify email addresses with a live SMTP mailbox check, check phone number formats and email domains.

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Skavio PDF, OCR & Document Processing MCP

OAuth PDF, OCR, invoice and audio processing with prepaid company credits; card or USDC funding.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22Not checked yet
smails

Disposable email inboxes for AI agents: create an address, wait for the verification email.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
SmartAgent CRM

MCP server for SmartAgent CRM: leads, tasks, sales pipelines, property listings

Marketing & SalesCode & DevOps

Requires authNot measured5 / 22Not checked yet
SmartPDF

47 PDF and image tools: convert, compress, merge, OCR, edit, redact personal data, sign, watermark

MediaFile & docs

Requires authNot measured5 / 22Not checked yet
smbCloud Mail & Auth

Email infrastructure and authentication for developers: domains, inbox routes, auth apps, deploys.

ProductivityCode & DevOps

Requires authOutdated checkNot measured5 / 22
SMTPing Email Verification

Verify email addresses, clean lists and check spamtrap, disposable, spambot and complainer lists.

Developer ToolsCommunication & messaging

Requires authOutdated checkNot measured5 / 22
SnapHost

Send a live, private link to a client from Claude. Updates in place, viewers by email.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Social Fetch

Public social-data API and live docs for AI coding agents.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
SORNFlow

Document approval workspace. Remote MCP with OAuth; tools follow the signed-in member's space ACL.

Developer ToolsFile & docs

Requires authOutdated checkNot measured5 / 22
Spark

Build and run a business from your AI assistant, with hosting, payments, email and more built in.

Finance & CryptoPayments & trading

Requires authOutdated checkNot measured5 / 22
SpeedPainter Explainer Video

Turn text, notes, or documents into narrated hand-drawn whiteboard explainer videos with subtitles.

MediaFile & docs

Requires authOutdated checkNot measured5 / 22
Speko AI

Manage Speko voice-AI agents, sessions, calls, phone numbers, knowledge bases, evals, and docs.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
SplitScanner

Reverse stock split calendar, history and source filings. Requires SplitScanner or Signal8 Pro.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22Not checked yet
SSRS2

Markdown to editable PowerPoint, Word, PDF; checks, edits and previews RDLC/RDL reports.

Developer ToolsFile & docs

Requires authOutdated checkNot measured5 / 22
Stable Baseline

End-to-end agent-managed company brain. Docs, diagrams, plans, databases, agents, Knowledge Graph.

Developer ToolsDatabase

Requires authNot measured5 / 22Not checked yet
StateDock

Shared task layer for AI agents: tasks, handoffs and decisions that persist across tools.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
Stele

Shared project memory for AI coding agents: decisions, lessons, risks and tasks in one graph.

EducationKnowledge & memory

Requires authOutdated checkNot measured5 / 22
Stride — AI software delivery platform

Your team's stories, acceptance criteria, designs and docs, for coding agents. Sign in with OAuth.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
Strunk

Publish drafts to Google Docs for review, then revise and resolve reviewer comments in your AI tool

ProductivityFile & docs

Requires authOutdated checkNot measured5 / 22
SunoMV Music Video Generator

Turn a Suno song into a lyric-synced music video: stills, video clips, lip-sync, export by email.

MediaCommunication & messaging

Requires authOutdated checkNot measured5 / 22

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