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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1560 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
NumProof

Deterministic signed verification of numeric & financial claims for AI agents & spreadsheets.

ProductivityFile & docs

Responded198 ms12 / 22
Life Strategist

Clarify a decision or career crossroads with a private strategy conversation. Start with a free 20-m

ProductivityFile & docs

Responded509 ms12 / 22
in.co.buildwright/compliance

Indian business compliance answers: MCA late fees, filing calendar, cheque bounce, MSME interest.

ProductivityFile & docs

Outdated check729 ms12 / 22
echo.email Deliverability Test

Send a test email, get SPF, DKIM, DMARC, TLS and IPv6 results plus sender rules. No key.

ProductivityCommunication & messaging

Outdated check64 ms11 / 22
com.x402supply/pii-redact

Detects and redacts PII (emails, phones, SSNs, names, addresses) from text. $0.02/call via x402.

ProductivityCommunication & messaging

Outdated check68 ms11 / 22
Professor Sausages — Trust & Verification

Email, phone, domain, URL & OFAC verification; phishing and IBAN checks via x402.

ProductivityCommunication & messaging

Outdated check88 ms11 / 22
IPOGrid IPO Calendar & Filing Research

IPO calendar, SEC filings, deal terms, and IPO news research via the IPOGrid MCP server.

ProductivityFile & docs

Outdated check98 ms11 / 22
agentic sinkhole research

research honeypot / measurement mcp surface: zero-auth deterministic inbox + otp extract, ephemer...

ProductivityCommunication & messaging

Outdated check138 ms11 / 22
VerifAI

Email verification and domain intelligence for AI agents, including single and bulk email checks.

ProductivityCommunication & messaging

Outdated check218 ms11 / 22
com.jojapi/verify-the-email-instantly

Verify the email instantly: Identify the spam email while authenticating your users.

ProductivityCommunication & messaging

Outdated check239 ms11 / 22
Cherami

Email inboxes for recurring agent work. Read, search, reply, draft and organize correspondence.

ProductivityCommunication & messaging

Outdated check313 ms11 / 22
GrabMail disposable email

Disposable email for agents: create an inbox, wait for the message, read the code. No key needed.

ProductivityCommunication & messaging

Outdated check328 ms11 / 22
Plate

Minimal project management for teams and AI agents.

ProductivityFile & docs

Outdated check370 ms11 / 22
Persistent text store

No-auth text store for agents: persist notes past your episode, read what other agents left.

ProductivityFile & docs

Outdated check412 ms11 / 22
Mekler AI

Research, inference, data/web/email tools, and x402 conformance, service catalog and grade feeds.

ProductivityCommunication & messaging

Responded500 ms11 / 22
Vela Breakout

What's growing in tech, measured daily: AI apps, models, dev tools, software spend, hiring.

ProductivityFile & docs

Outdated check531 ms11 / 22
SignatureForever

Audit and build email signatures that survive Gmail, Outlook desktop and Apple Mail.

ProductivityCommunication & messaging

Outdated check538 ms11 / 22
MTD Chase — chase clients for MTD records

UK bookkeepers: chase clients for Making Tax Digital quarterly records, upload links, reminders.

ProductivityFile & docs

Outdated check563 ms11 / 22
Disposable Email Checker

Checks if an email/domain is disposable (temp-mail). x402-metered per call.

ProductivityCommunication & messaging

Outdated check568 ms11 / 22
Strategic Flow MCP

Audit B2B SaaS lifecycle emails with the 7-point Decision Friction Model: score, patterns, fixes.

ProductivityCommunication & messaging

Outdated check683 ms11 / 22
覓安居

Search Taiwan long-term care facilities; signed-in users get profile and notes.

ProductivityData access / search

Outdated check757 ms11 / 22
Bluetab

Read and organize your Bluetab saved tab groups, projects, Brain Dump notes and reminders.

ProductivityFile & docs

Outdated check770 ms11 / 22
The Agent Bar

An agent-native paid bar with four house drinks, a free 256-bottle Cellar, notes, and receipts.

ProductivityFile & docs

Outdated check819 ms11 / 22
Safe Merchant Solutions Assistant

Safe Merchant Solutions assistant: search services and knowledge, and request a contact.

ProductivityData access / search

Outdated check862 ms11 / 22

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