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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5252 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
Current Date/Time Tool

Returns the actual current date/time in a given format and IANA timezone.

OtherOther

Responded187 ms13 / 22
brief bar_

Free bar for digital product briefs: your model judges, open rules and code score it.

OtherOther

Outdated check187 ms13 / 22
vareen.net (Vaia)

Answers about vareen.net from its website: products, technical data, comparisons, sales contact.

OtherOther

Outdated check187 ms13 / 22
Elfy.Life

Articles, recettes, événements, calculateurs HOMA/QUICKI — santé métabolique, alimentation cétogène

OtherOther

Outdated check187 ms13 / 22
Vegas Mobile Mech — book mobile mechanic in Las Vegas

Book mobile mechanic in Las Vegas, NV: prices, service area by ZIP, free callback from a local pro.

OtherOther

Outdated check187 ms13 / 22
Shipping Rates & Postage Calculator

Live USPS, UPS & FedEx shipping rates plus USPS postage and stamp prices. Free, no API key.

OtherOther

Outdated check187 ms13 / 22
com.brainonbnb/health-factor

Venus health factor of any BNB Chain account, free; liquidation stress paid, free holding 1M $BOBAI.

OtherOther

Outdated check188 ms13 / 22
Cambridge China Bridge — China sourcing

UK import duty, landed cost, anti-dumping and compliance checks for China-sourced goods.

OtherOther

Outdated check188 ms13 / 22
SimoShop

Catalogul SimoShop: bijuterii si componente din argint 925, cautare si top produse, preturi in lei.

OtherOther

Outdated check188 ms13 / 22
STR Host Tools

Free STR host tools: fee repricers, price matcher, claim deadlines, chore checker, host prompts.

OtherOther

Outdated check188 ms13 / 22
Guía Extranjeros

Dated guides for foreigners in Spain: NIE, TIE, arraigo, residence, health, taxes. ES/EN/UK.

OtherOther

Outdated check189 ms13 / 22
Tulsa Foam Pros — book spray foam insulation in Tulsa

Book spray foam insulation in Tulsa, OK: prices, ZIP coverage, free callback.

OtherOther

Outdated check189 ms13 / 22
Astraluno

Birth charts, Big Three and sky events with explicit uncertainty. Free; birth data never stored.

OtherOther

Responded191 ms13 / 22
PoemShip

Poems for a mood, a situation or an occasion, with poets, analyses and plans to learn by heart.

OtherOther

Outdated check191 ms13 / 22
VXLVERSE

Turn a story idea into a 3D game that plays in the browser, and get a link that opens it.

OtherOther

Outdated check192 ms13 / 22
Quantum Expectations

Quantum error-correction feasibility: success probability, qubit overhead, records, trends.

OtherOther

Outdated check192 ms13 / 22
Checksum Validator

Validates Luhn, IBAN, ISBN, EAN/UPC, SWIFT/BIC, and EU VAT checksums and formats.

OtherOther

Responded193 ms13 / 22
PCBBrew

Boards and modules for real PCBs: catalogue, KiCad parts, wiring and power checks, published boards.

OtherOther

Outdated check193 ms13 / 22
CraftMe – Book craftspeople

Find trade businesses near you, see services, prices and free times, and prepare a booking.

OtherOther

Responded195 ms13 / 22
Spanndecken ROTH Preisrechner

Spanndecken (stretch ceiling) price calculator: free non-binding net EUR estimate from the m² area.

OtherOther

Outdated check195 ms13 / 22
Semly Public Website

Read-only Semly plans, prices, features, integrations and published articles in 15 languages.

OtherOther

Responded196 ms13 / 22
Rush SR Lap Analyzer

Analyze AiM RaceStudio lap data: lap times, compare laps, time loss, compare two sessions.

OtherOther

Responded197 ms13 / 22
Juntamos: organizar grupos

Crear amigo invisible, votaciones y repartos de gastos para un grupo

OtherOther

Outdated check197 ms13 / 22
OFACScreen Sanctions Screening

Screen names and addresses on US, UN, EU, UK and other sanctions and export-control lists. Free.

OtherOther

Outdated check197 ms13 / 22

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