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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2931 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
Knowa

Team docs served to AI agents over MCP - search, Markdown reads, version pinning, read audit.

Developer ToolsFile & docs

Requires authNot measured5 / 22Not checked yet
Knowtis

Create, search and manage Knowtis collaborative notes from AI assistants.

ProductivityData access / search

Requires authOutdated checkNot measured5 / 22
Kooga

AI marketing for businesses: SEO content, AI visibility, email campaigns and analytics.

Marketing & SalesCommunication & messaging

Requires authNot measured5 / 22
Krewbill

Per-client shared AI memory: approved notes that Claude, ChatGPT and Cursor read over MCP.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
Laddro Career

Tailor resumes, generate cover letters, render CVs as PDF, and browse 22+ templates.

ProductivityFile & docs

Requires authNot measured5 / 22Not checked yet
LatticeNet

Publish articles and notes under your own byline, to a readership of other AI agents.

ProductivityFile & docs

Requires authOutdated checkNot measured5 / 22
lavela

Deploy a repo to a live app from chat: servers, Postgres, domain, email, Stripe, security scan.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22
Laviya

Laviya project management: read and update tasks, wikis, sprints and test cases.

ProductivityCode & DevOps

Requires authOutdated checkNot measured5 / 22
LayerCall

Score an IP, email, phone, domain or device for fraud in one call, with the signals behind it.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
LeadMagic Sheets — AI Spreadsheet with Live Enrichment Columns

AI spreadsheet with live enrichment columns — emails, mobiles, firmographics.

ProductivityFile & docs

Requires authNot measured5 / 22
LearnOS

Hosted MCP for LearnOS: search courses, lesson citations, flashcards and notes from any MCP client.

EducationKnowledge & memory

Requires authOutdated checkNot measured5 / 22
Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun

Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Letterkeel: Send Email via SMTP, Resend, SendGrid & Mailgun

Letterkeel: send email from your own domain via SMTP, Resend, SendGrid, Mailgun, Postmark

Developer ToolsCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Letterly

Bring Letterly voice notes and meetings into your AI chat to search, rewrite, translate, and more.

ProductivityData access / search

Requires authOutdated checkNot measured5 / 22
LetX

Collaborative LaTeX editor: search 1000+ templates, edit projects, and compile them to PDF.

OtherData access / search

Requires authOutdated checkNot measured5 / 22
Likelyread

Email open tracking for agents: add a pixel, register the send, read back who opened it

MediaCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Limitguard Lead Verification

Lead validation over MCP: KVK/KBO register, EU VAT, sanctions and email checks with sources.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Linkedcamp

LinkedIn and email outreach: campaigns, unified inbox, leads, analytics and reports.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured5 / 22
Requires authNot measured5 / 22Not checked yet
ListCheckup

Email verification for AI agents: check addresses and lists, priced before credits are spent.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
Little Monk

Daily planner for iPhone, iPad and Mac: today's plan, tasks, deep work, notes and ideas.

Developer ToolsCode & DevOps

Requires authOutdated checkNot measured5 / 22
Living Docs

Create and improve live, shared interactive documents with your agent.

Developer ToolsFile & docs

Requires authOutdated checkNot measured5 / 22
LLM Data Guard: PII & Secrets Redaction

Detect and redact PII and secrets (API keys, tokens) in text, HTML or PDF before it reaches an LLM.

Developer ToolsCode & DevOps

Requires authNot measured5 / 22Not checked yet
LLMtoMD

Convert PDFs, Office docs, websites and audio into AI-ready Markdown, then search and ask your docs.

MediaFile & docs

Requires authOutdated checkNot measured5 / 22

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