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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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
Nextmail

AI-native email for businesses, developers, and AI agents.

ProductivityCommunication & messaging

Requires authNot measured5 / 22
Nilyo

Your own LinkedIn, WhatsApp, Instagram, Telegram, Email and Calendar accounts, usable from any agent

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Nitrosend

AI-native email marketing. Campaigns, automations, transactional, contacts, and analytics.

Marketing & SalesAutomation & workflows

Requires authOutdated checkNot measured5 / 22
NoBounce Email Validation

Real-time single and bulk email validation (syntax, MX, 5,000+ disposable domains, SMTP).

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Nonlinear Calendar

Nonlinear Calendar: this year’s months fold onto the previous 12 years. No key to try.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
Noogat

Voice notes that organize themselves. Capture by Siri, AI auto-tags, semantic search retrieves.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
NoteMCP

Shared Markdown notes for MCP-compatible AI tools.

Developer ToolsFile & docs

Requires authNot measured5 / 22Not checked yet
Notes

A daily notebook your AI writes in — on today's page, in your entity graph, marked as its own.

ProductivityFile & docs

Requires authOutdated checkNot measured5 / 22
Notion MCP by InsightfulPipe

Hosted Notion MCP server for Claude, ChatGPT and Cursor, with each action switched per account.

ProductivityFile & docs

Requires authOutdated checkNot measured5 / 22
Notipo

Publish to self-hosted WordPress from AI agents: markdown, images, SEO, and Notion sync.

MediaFile & docs

Requires authNot measured5 / 22Not checked yet
Octoparse MCP Server

Official Octoparse MCP server for template discovery, cloud tasks, and structured data export.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
oJo — HTML to image and PDF

Fill an HTML template with JSON and get a hosted PDF or image link. Free previews, no key.

MediaFile & docs

Requires authNot measured5 / 22
Olaverse Lab

Document extraction with calibrated confidence, decisions, language ID in 608 languages, diacritics.

Developer ToolsFile & docs

Requires authNot measured5 / 22Not checked yet
Omamo

Find, read, and save your Omamo links and notes from Claude, ChatGPT, Cursor, and other AI apps.

ProductivityAI / LLM tooling

Requires authOutdated checkNot measured5 / 22
Omnier

Turn signals from email, CRM, and meetings into a prioritized daily sales to-do list.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Onboard

Your AI copilot for customer onboarding — projects, KPIs, tasks, and safe writes.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
One

Find, document and execute authenticated API calls across 1000+ apps via one MCP server

Developer ToolsFile & docs

Requires authOutdated checkNot measured5 / 22
OneLore

Shared project context for AI agents and teams: docs, tasks, and messages that stay current.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
Oneprofile

Find prospects, research them, and run email and LinkedIn outreach in your Oneprofile workspace.

ProductivityCommunication & messaging

Requires authNot measured5 / 22
OpenMail

Gmail for agents: create inboxes, read and reply to mail, send email, manage domains. OAuth sign-in.

ProductivityCommunication & messaging

Requires authNot measured5 / 22
OpenOak

Secure AI access to OpenOak tasks, notes, and Kanban boards.

ProductivityFile & docs

Requires authNot measured5 / 22
Operis

Hire a person for real-world tasks in San Francisco. You pay only when proof passes.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
Opsis OSINT

OSINT search: find the accounts behind an email, username or domain across 1,000+ sources.

ProductivityCommunication & messaging

Requires authOutdated checkNot measured5 / 22
ORANO MCP

Agents save, analyze and act on videos and links: transcripts, research, tasks, Ori.

MediaCode & DevOps

Requires authNot measured5 / 22Not checked yet

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