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

2948 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
iSomor PDF Translation

Translate text PDFs, keep the layout, get bilingual PDFs. MCP: EN/ZH. Website: 92 languages.

Developer ToolsFile & docs

Requires authOutdated checkNot measured4 / 22
JackTrade CRM

Search customers, manage quotes, work orders, action items, and calendar events for your business

ProductivityData access / search

Requires authOutdated checkNot measured4 / 22
jitprompt

Just-in-time instructions for agents: upload docs, serve only the sections each turn needs.

Developer ToolsCode & DevOps

Requires authNot measured4 / 22Not checked yet
jobwyre

Track job applications on a board: let Claude or ChatGPT read and update jobs, interviews, notes.

ProductivityAI / LLM tooling

Requires authNot measured4 / 22
John's Essentials

144 deterministic file tools: PDF, image, media, convert, analyze. Connect in one click (OAuth).

MediaFile & docs

Requires authNot measured4 / 22Not checked yet
Jotter

Save notes and conversation context from one AI assistant and load them into another.

ProductivityFile & docs

Requires authOutdated checkNot measured4 / 22
Junifye

Write books, studies & commentaries with your AI — EPUB, print-ready PDF, web reader, ISBN, RTL

OtherFile & docs

Requires authNot measured4 / 22
Just Say It

Your meetings, searchable: what was decided, the notes, and adding points to a live meeting.

ProductivityFile & docs

Requires authNot measured4 / 22
JustEmails

Email hosting from your AI: read and send mail, add domains, check DNS and manage mailboxes.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Kadmo

Dispatch work to Kadmo's AI agents, read tasks and runs, edit skill packs, playbooks and routing

Developer ToolsCode & DevOps

Requires authNot measured4 / 22
Kalender Sync

EU-hosted calendar MCP: Google, Outlook, iCloud, GMX, WEB.DE, CalDAV. Read, book, RSVP, sync.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Kaliham

Search, read and draft email across Gmail, Outlook, Yahoo and work accounts in one Kaliham inbox.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
Kalpana Batch

Generate ad creatives and product images in bulk from a spreadsheet, for every product or campaign.

ProductivityFile & docs

Requires authOutdated checkNot measured4 / 22
Kasar CRM

AI-native CRM: records, pipelines, tasks, calendar and the email, LinkedIn and WhatsApp inbox.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
Kasset

Search and read your Kasset meetings and conversations: notes, transcripts and action items.

ProductivityData access / search

Requires authNot measured4 / 22
Kasti

Save thoughts to your private notes and find how they connect to what you wrote before.

ProductivityFile & docs

Requires authNot measured4 / 22
Kawaa email verification

Check whether an email address can receive mail, one address or a list, without sending to it.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
Keep

Read-it-later for AI agents. Save links, bookmarks, notes, and videos as Markdown and search them.

ProductivityFile & docs

Requires authOutdated checkNot measured4 / 22
Kerux

Run your LinkedIn, email and SMS outreach from your AI assistant

ProductivityCommunication & messaging

Requires authOutdated checkNot measured4 / 22
KeyKeeper Email

Real email inboxes for AI agents: register, receive, read and send mail over MCP. Free to receive.

ProductivityCommunication & messaging

Requires authNot measured4 / 22Not checked yet
Kicklace

Kicklace, lifecycle email for SaaS founders: look customers up, run reports, draft emails.

ProductivityCommunication & messaging

Requires authNot measured4 / 22
Klarbon

Open, check and convert European e-invoices and bank statements. No document archive.

Finance & CryptoPayments & trading

Requires authNot measured4 / 22Not checked yet
kloudboard

Boards, cards, tasks, review, Drive and AI tools for content teams and YouTube creators.

MediaAI / LLM tooling

Requires authNot measured4 / 22
Knossot

Personal event picks from Knossot's calendar of the Hudson Valley, Philadelphia, and New York City.

ProductivityFile & docs

Requires authNot measured4 / 22Not checked yet

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