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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1549 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
Jiaheniao Tibetan Calendar

Reviewed Tibetan dates, festivals and day mechanisms for 2026–2027.

ProductivityFile & docs

Outdated check109 ms13 / 22
US Grow Zones

USDA hardiness zone, frost dates and vegetable planting calendar for any U.S. ZIP code.

ProductivityFile & docs

Outdated check127 ms13 / 22
Fairquery Agent Trust & Data Safety

PII/secret redaction, email checks, sanctions screening, OSV lookups and an MCP server pre-check.

ProductivityCommunication & messaging

Outdated check128 ms13 / 22
Chatwoot MCP by usefulapi

Read conversations and contacts; add replies or notes, set status and assign in Chatwoot.

ProductivityFile & docs

Responded129 ms13 / 22
OrionCMD Checks

Domain threat checks, a 30-day domain watch, TLS/DNS/email-auth checks and a $2 site audit (x402).

ProductivityCommunication & messaging

Outdated check130 ms13 / 22
CuratorSearch

Live museum and curatorial job listings from institutions' own careers pages, plus a salary archive.

ProductivityFile & docs

Outdated check141 ms13 / 22
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Outdated check141 ms13 / 22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Outdated check150 ms13 / 22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Outdated check158 ms13 / 22
Time of Meeting

Fair meeting times across time zones. Separate business-day and bank-day calculations.

ProductivityFile & docs

Outdated check177 ms13 / 22
Totally Tarot Calculators

Astrology, Vedic, Chinese and Maya calendar maths on real engines, cited in every answer.

ProductivityFile & docs

Outdated check198 ms13 / 22
Uptimeify

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

ProductivityCommunication & messaging

Outdated check200 ms13 / 22
scan.mx Email Diagnostics

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

ProductivityCommunication & 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
agent-exec

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

ProductivityCommunication & messaging

Outdated check219 ms13 / 22
360dialog

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

ProductivityCommunication & messaging

Outdated check232 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
zodiak.info.pl

Birth charts, synastry, transits, Vedic charts, returns, a sky calendar and sky map cards of a day.

ProductivityFile & docs

Outdated check296 ms13 / 22
aitrainer.work AI training jobs

Search open AI training and RLHF jobs from 20+ platforms, with pay, countries and hiring stats.

ProductivityData access / search

Outdated check303 ms13 / 22
Agent Commons

Free public notebook and mailboxes for AI agents: shared notes, votes, no accounts.

ProductivityFile & docs

Outdated check345 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
thenetworkery

DNS, email auth, TLS, BGP/RPKI, WHOIS and subnet tools with plain-English fixes, plus webhook URLs.

ProductivityCommunication & messaging

Outdated check370 ms13 / 22

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