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

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5348 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
MCPFax Feed Reader

What a source published since you last looked, from any RSS, RDF or Atom feed.

OtherOther

Responded135 ms13 / 22
MCPFax URL Intelligence

Where a link really goes, what the server says about itself, and what pages a site publishes.

OtherOther

Responded137 ms13 / 22
MCPFax Food Facts

Can this person eat this? Allergens, additives and nutrition from a barcode.

OtherOther

Responded137 ms13 / 22
Alexey Sound — sound recordist, Dubai

Find and book a location sound recordist / production sound mixer in Dubai and the UAE.

OtherOther

Responded137 ms13 / 22
United States Salary Calculator

United States 2026: net pay itemised, gross for target net, employer cost, vs NL.

OtherOther

Outdated check137 ms13 / 22
ReplacementHQ 3D Printer Parts Register

3D printer materials and wear parts for Bambu Lab and Prusa, quoted from the makers' own pages.

OtherOther

Outdated check137 ms13 / 22
PepEvolution Peptide Sources

Find where to buy peptides from vetted, COA-tested vendors and check if a peptide vendor is legit.

OtherOther

Responded139 ms13 / 22
Mandarin The Wild Reader

Read real Chinese word by word: each word's meaning in its sentence, its pinyin and its parts.

OtherOther

Responded140 ms13 / 22
YerevanEstate — Yerevan apartment prices

Yerevan, Armenia apartment prices: price per m² by district, street or point, rent, yields, deals.

OtherOther

Responded140 ms13 / 22
TrovaStorage

TrovaStorage.it è il marketplace per il self-storage. Cerca centri, schede per città. Sola lettura.

OtherOther

Outdated check140 ms13 / 22
Dollea Beauty Coworking

Find beauty workspaces in Munich and rent them at your approved personal rates.

OtherOther

Responded141 ms13 / 22
TBG — The Brett Group

Licensed contractor matching, permit rules and investor loans for Annapolis, Maryland

OtherOther

Responded141 ms13 / 22
LTD Turnaround UK Insolvency Data

UK company insolvency figures, winding-up petition counts and the insolvency practitioner register.

OtherOther

Outdated check142 ms13 / 22
needmoar.games

Ranks Steam games by how much players like them, learned from head-to-head duels.

OtherOther

Outdated check142 ms13 / 22
SCiMon.co RFQ Desk

Request quotes for custom parts, design services and box build from pre-vetted suppliers.

OtherOther

Responded143 ms13 / 22
France Salary Calculator

France salary 2026: net pay itemised, gross for a target net, employer cost, vs the Netherlands.

OtherOther

Outdated check143 ms13 / 22
brussels.toots/tickets

Agenda and ticketing for Toots Jazz Club, Brussels: browse concerts, check seats, reserve tickets.

OtherOther

Responded144 ms13 / 22
Kamakura Trip Planner

Kamakura and Enoshima day plans, Enoden fares and passes, bloom dates, sights and walking times.

OtherOther

Outdated check144 ms13 / 22
Portal Haras

Locales, oficinas y viviendas en pozo en Escobar, Argentina: datos, precios, guías y contacto.

OtherOther

Responded145 ms13 / 22
WebSpeed

Measure a page with PageSpeed Insights and compare it with its copy sped up by WebSpeed Fast.

OtherOther

Outdated check145 ms13 / 22
CheckFitment

Bolt patterns and wheel specs by vehicle, wheel and tire fitment, spacer and gear ratio maths.

OtherOther

Responded146 ms13 / 22
apartment.loans: apartment loan sizing

Size and compare financing for 5+ unit apartment buildings: DSCR, LTV, cash-out, bridge takeout.

OtherOther

Outdated check146 ms13 / 22
Dataroia Data Trust

Vérification B2B française : SIRET, SIRENE, dirigeants RNE, santé d'entreprise. Hébergé en France.

OtherOther

Responded147 ms13 / 22
iHelpU Seminovos — iPhones usados no RS

iPhones usados e seminovos à venda no RS (Brasil): estoque ao vivo, preços e 9 lojas iHelpU.

OtherOther

Responded147 ms13 / 22

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