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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5233 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
GreenCycle Compound Atlas

Read-only cannabis compound, receptor, anatomy and evidence data, every value sourced.

OtherOther

Responded107 ms15 / 22
Naibul — agent-only board-game hall

Agent-only board-game hall: 12 verifiable games — chess, Go, backgammon, and 8-seat Werewolf.

OtherOther

Responded109 ms15 / 22
Isto Intents

Ask a local listing portal to keep looking for a used car or home; the user confirms there.

OtherOther

Responded116 ms15 / 22
AppTierList

Ranked iPhone app lists by use case (S to F) from public App Store data. Read-only, no key.

OtherOther

Responded119 ms15 / 22
Context Pill

Daily feed of AI releases, tools and techniques, each labeled with how it was checked.

OtherOther

Responded122 ms15 / 22
Equation.io

Create interactive 2D and 3D graphs with validated equations, shareable links, and PNG previews.

OtherOther

Responded128 ms15 / 22
GQLTeam (Dan Podina)

Services, case studies, articles and contact details of software architect Dan Podina.

OtherOther

Responded130 ms15 / 22
Digital Gemology: gem identification and gemstone properties

Identify gemstones by refractive index, birefringence, SG, pleochroism and spectrum. Compare 7 gems

OtherOther

Responded141 ms15 / 22
Digital Gemology: gemstone and diamond cut library

Gemstone and diamond cuts: ray-traced brilliance, fire and sparkle in 7 gems, 3D and faceting files

OtherOther

Responded143 ms15 / 22
PakBus

Bus and metro journeys, departures, routes, fares and service changes in Pakistani cities.

OtherOther

Responded151 ms15 / 22
StackTheDeal Deals

Live, verified deals from StackTheDeal — every price checked on the retailer's own page.

OtherOther

Responded160 ms15 / 22
Digital Gemology: gemology glossary and grading report terms

Gemology glossary: grading report terms, 4 Cs, clarity, colored gemstones, how sparkle is measured

OtherOther

Responded160 ms15 / 22
PostData

No-signup IoT backend: device names, sensor readings, history and live charts. No API key needed.

OtherOther

Responded160 ms15 / 22
Holos33

Read-only facts on Holos33, an EU privacy-first wellbeing platform: modules, Early Access, privacy.

OtherOther

Responded168 ms15 / 22
Shipshape Data

Services, case studies, 169 data and AI guides, and AI readiness scoring. Read-only, keyless.

OtherOther

Responded169 ms15 / 22
CardWorthScanner — TCG Price, Centering & PSA Grading ROI Engine

Calculate PSA/BGS/CGC card grading ROI, 55/45 centering grades & Pokemon/Yu-Gi-Oh market values.

OtherOther

Responded173 ms15 / 22
Urantia Papers

The Urantia Papers in English and Spanish, with cross-references to the Bible and 21 texts. No key.

OtherOther

Responded180 ms15 / 22
InkQuest

Browse free InkQuest stories, openings, and HSK recommendations.

OtherOther

Responded187 ms15 / 22
ProofSnap Verify

Check by manifest SHA-256, without an account, whether the ProofSnap API issued an evidence package.

OtherOther

Responded190 ms15 / 22
Homo Universalis — Swiss Ephemeris Astrology, Natal Chart, Synastry & Cosmic Soul MCP Oracle

Swiss Ephemeris natal chart, 3D soul synastry & cosmic ephemeris oracle (<1.5ms, Zero-Auth).

OtherOther

Responded192 ms15 / 22
Homo Universalis — Viveka Astrology, Natal Chart, Synastry, BaZi, Vedic, Mayan & Tarot MCP Oracle

Swiss Ephemeris Astrology, Natal Chart, 3D Synastry, BaZi, Vedic, Mayan, I-Ching, Tarot & Kabbalah.

OtherOther

Responded196 ms15 / 22
Model Salt

Randomness from outside the model, so one prompt gives different answers that still fit the ask.

OtherOther

Responded199 ms15 / 22
SynergyBoat

SynergyBoat's public company data — services, case studies, AI use cases, team — and lead capture.

OtherOther

Responded202 ms15 / 22
TOVREK Current-State Resolver

Verify DOI metadata before autonomous action; preserve conflicts, provenance, and UNKNOWN.

OtherOther

Responded223 ms15 / 22

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