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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1424 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
Powerline Email Tools

Email deliverability checks: SPF, DKIM, DMARC, BIMI, MTA-STS, blacklists, headers, spam words

ProductivityCommunication & messaging

Outdated check141 ms13 / 22
DeckExtract

Download DocSend and Papermark decks as PDF or PPTX, including email-gated and protected links.

ProductivityCommunication & messaging

Outdated check150 ms13 / 22
Refine Job Search

Job search management: applications, interviews, offers, recruiter email, and company openings.

ProductivityCommunication & messaging

Outdated check158 ms13 / 22
GBG Loqate - Reach

Verify addresses, email addresses, and phone numbers with confidence scores.

Developer ToolsCommunication & messaging

Responded164 ms13 / 22
Uptimeify

Free anonymous website, DNS, email and TLS checks, plus monitor read and opt-in write access.

ProductivityCommunication & messaging

Responded200 ms13 / 22
Lyre Leads

Every business of a kind in a city, from Google Maps, read from its website, with verified emails.

Marketing & SalesCommunication & messaging

Outdated check208 ms13 / 22
scan.mx Email Diagnostics

Email deliverability check: MX, SPF, DKIM, DMARC, blacklists, MTA-STS, DNSSEC, BIMI. Graded, no key.

ProductivityCommunication & messaging

Responded210 ms13 / 22
DomainCheck

Domain and email trust checks for agents: DNS, SPF/DMARC, disposable email. By Crypto Money Maker

Finance & CryptoCommunication & messaging

Outdated check210 ms13 / 22
NumeroClaw

Order a personalized numerology reading, paid by the person and delivered by email.

ProductivityCommunication & messaging

Outdated check212 ms13 / 22
BounceBan MCP by usefulapi

Check BounceBan credits, verify emails and read asynchronous bulk verification results.

ProductivityCommunication & messaging

Outdated check214 ms13 / 22
agent-exec

Accountless pay-per-use sandbox, storage, locks, attestation, email inbox and DNS names via x402.

ProductivityCommunication & messaging

Responded219 ms13 / 22
Bouncify MCP by usefulapi

Check Bouncify credits, verify emails and run confirmed bulk verification jobs.

ProductivityCommunication & messaging

Outdated check221 ms13 / 22
360dialog

Manage WhatsApp Business accounts on 360Dialog: channels, templates, sandbox, inbox, and more.

ProductivityCommunication & messaging

Outdated check232 ms13 / 22
pingwa

Zero-setup WhatsApp notifications + human-in-the-loop for AI agents — text 'join', send in 60s.

Developer ToolsCommunication & messaging

Responded240 ms13 / 22
MX Verdict

Free, read-only email and DNS checks: SPF, DKIM, DMARC, MX, DNS records, blocklists, domain health.

ProductivityCommunication & messaging

Outdated check243 ms13 / 22
AttackerView quick website security check

Passive security check of a domain: headers, TLS, DNS and email authentication. No login needed.

ProductivityCommunication & messaging

Outdated check247 ms13 / 22
Surfing Dog

Find businesses and what they sell, check a website for AI agents, and reach a business's inbox.

ProductivityCommunication & messaging

Outdated check254 ms13 / 22
Africa Scam Check

Fraud patterns a message or call resembles in Kenya and Nigeria, and where to report.

OtherCommunication & messaging

Responded258 ms13 / 22
Ghana Scam Check

Compares a message with fraud patterns reported in Ghana and says where to report.

OtherCommunication & messaging

Outdated check260 ms13 / 22
WhaTools — WhatsApp tools

WhatsApp tools: wa.me links, QR codes, share widgets, phone validation, API rate card & limits.

OtherCommunication & messaging

Outdated check292 ms13 / 22
InfectRisk

Flu, COVID-19 and RSV activity for 24 countries, plus the tracked WHO outbreak notifications.

OtherCommunication & messaging

Outdated check355 ms13 / 22
Enriquecimento de Lead

Enriches a contact from a mobile number and email, returning the associated registration data. Platf

Developer ToolsCommunication & messaging

Responded361 ms13 / 22
MailVakt

Use when email lands in spam: audits SPF, DKIM, DMARC, MX and returns the DNS records to fix it.

ProductivityCommunication & messaging

Outdated check362 ms13 / 22
Discord

Connect a Discord bot (bot token from the developer portal) to read/send messages, list guilds and c

Developer ToolsCommunication & messaging

Responded367 ms13 / 22

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