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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2874 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
AdminPulse MCP by usefulapi

Read relations, invoices, tasks and documents; create tasks and log interactions in AdminPulse.

Finance & CryptoPayments & trading

Responded208 ms14 / 22
Printwren: HTML to PDF and URL to PDF (real Chrome)

Printwren: web page or HTML to PDF with real Chrome; pages, base64 or download link. Free, no key.

Developer ToolsCode & DevOps

Outdated check210 ms14 / 22
Bloomerang MCP by usefulapi

Search Bloomerang constituents and donations; log interactions, notes and tasks.

ProductivityData access / search

Responded211 ms14 / 22
Palmyr

Agent infra: email, phone, social, domains, VPS, wallets. Paid per-action via x402, no API key.

Finance & CryptoPayments & trading

Outdated check212 ms14 / 22
Nasaq UI

Nasaq design system docs for agents: 390 components for React, Vue, Blade and HTML, with Arabic RTL.

Developer ToolsCode & DevOps

Outdated check214 ms14 / 22
GenPPT

Generate AI slide decks and export native PowerPoint (.pptx) and PDF presentations from chat.

Developer ToolsFile & docs

Outdated check234 ms14 / 22
Lane Planner

Turn a list of interests into a day-by-day plan for 3 to 7 days, with checkbox text for a todo app.

ProductivityFile & docs

Outdated check236 ms14 / 22
Follow Up Boss MCP by usefulapi

Search Follow Up Boss leads, review calls and deals, and add notes, tasks and deal updates.

Marketing & SalesData access / search

Responded238 ms14 / 22
NuvUI

The docs, rules, blocks, charts and design tokens of nuvui, a React UI library, for coding agents.

Developer ToolsCode & DevOps

Outdated check241 ms14 / 22
Témoin public

Prove a web page or document existed on a date: public SHA-256 registry anchored in Bitcoin. Free.

Finance & CryptoPayments & trading

Outdated check245 ms14 / 22
Aurora Solar MCP by usefulapi

Read projects, designs, pricing and financings; update projects and notes in Aurora Solar.

ProductivityFile & docs

Responded247 ms14 / 22
Contact Details Finder

Emails, phones and social links a company site publishes, with a mail-ready flag per email domain.

ProductivityCommunication & messaging

Outdated check248 ms14 / 22
Verifai — Email Verification & Domain Intelligence

Email verification and domain intelligence for AI agents. MX, RDAP, SSL checks. 25 free credits.

Developer ToolsCommunication & messaging

Responded249 ms14 / 22
Arthur Online MCP by usefulapi

Read Arthur properties, units and tenancies; track maintenance and add tasks or notes.

ProductivityFile & docs

Responded250 ms14 / 22
RevoGrid DataGrid MCP Pro

Hosted Pro MCP server for RevoGrid DataGrid docs, examples, feature checks, and migration guidance.

Developer ToolsCode & DevOps

Outdated check266 ms14 / 22
FlutterSDK Docs

Search Wind UI, Magic, Dusk, Telescope and Artisan documentation. Hosted, public, no auth.

Developer ToolsFile & docs

Outdated check272 ms14 / 22
Domain Mail Check

Check a domain's email DNS, whether Gmail and Outlook accept its mail, and its registration.

ProductivityCommunication & messaging

Outdated check291 ms14 / 22
AgencyBloc MCP by usefulapi

Read and update AgencyBloc individuals, groups, policies and agents; log activities and notes.

ProductivityFile & docs

Responded293 ms14 / 22
ContrastAPI

55 tools, 7 Resources, Sigma rules, email SPF/DMARC, MITRE, CVE/KEV, risk_score. No key.

ProductivityCommunication & messaging

Outdated check303 ms14 / 22
Email Engagement Report

Email Engagement Report turns a raw email event export into a per-recipient engagement report.

ProductivityCommunication & messaging

Outdated check311 ms14 / 22
Document Tools

Count words, translate a web page you own, or make a calendar .ics or CSV file.

ProductivityFile & docs

Outdated check313 ms14 / 22
FileForge

File tools for your AI chat: PDF tables to Excel, merge PDFs, images to PDF, fill PDF forms.

MediaFile & docs

Outdated check318 ms14 / 22
io.github.serg-tanichev/email-spam-tester

Test an email before it goes out: a disposable address, 41 checks with RFC citations, a fix plan.

Developer ToolsCommunication & messaging

Outdated check319 ms14 / 22
DokuTrak

Let your agent chase the documents: create, chase, read and collect DokuTrak Document Requests.

Developer ToolsFile & docs

Outdated check330 ms14 / 22

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