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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7640 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
Subdomain API

Find known subdomains of a domain. Passive data; may include historic entries. List or count.

OtherOther

Responded333 ms14 / 22
Events.Aero

Find aviation events: airshows, fly-ins, workshops and club meets. Public and read-only.

OtherOther

Responded333 ms14 / 22
MyGroceryPal

UK supermarket prices across 13 stores: price items and lists, see history, save lists, set alerts.

OtherOther

Responded334 ms14 / 22
wohandy.de Preisvergleich

Deutscher Preisvergleich für Handys – Bestpreis-Suche (read-only).

OtherOther

Responded334 ms14 / 22
Hark Tech 3D Printing and Repair (UK)

UK 3D printing quotes for your files or Printables models, mail-in repair prices and order status.

OtherOther

Responded334 ms14 / 22
GateCore Marketplace

Procure governed AI capabilities: machine-readable price, scope, trust, gateway-delegation terms.

OtherOther

Outdated check334 ms14 / 22
TwinEthos Lite

Which AI laws apply to an AI feature in a market: cited provisions, who they cover, dates, guards.

OtherOther

Responded335 ms14 / 22
com.electricskateboard/electricskateboard

Live prices for e-skateboards, onewheels, scooters and e-bikes: buy now or wait, with the evidence.

OtherOther

Responded336 ms14 / 22
GoThere Citizenship by Descent

Citizenship by descent (Ireland, Canada) plus sourced visa rules for Americans moving abroad.

OtherOther

Responded336 ms14 / 22
Jainebooks Catalogue

Search 16,000 free Jainism ebooks and audiobooks in Gujarati, Hindi, English, Sanskrit and Prakrit.

OtherData access / search

Responded337 ms14 / 22
FlightFinder Aviation Safety Data

Aviation accident narratives from 128 official authorities, plus FAA wildlife, laser and drone data

OtherOther

Responded337 ms14 / 22
CarHauler247 Car Shipping Quotes

Car shipping prices between US locations from a licensed auto transport broker, with a booking link.

OtherOther

Responded337 ms14 / 22
Boncourant

Audit et choix du tarif d'électricité en France : base | hp_hc | tempo, contrats, puissance et PPA.

OtherOther

Outdated check337 ms14 / 22
CalculPro — outils de calcul du bâtiment

Calculs du bâtiment (France) : chute de tension NF C 15-100 et catalogue de 111 outils.

OtherOther

Responded338 ms14 / 22
PriorStates Studio — free apps

Find free ready-made PriorStates Studio apps for everyday needs: expenses, receipts, chores, RSVPs.

OtherOther

Responded338 ms14 / 22
ChooseHelp Treatment Directory

Editorially independent addiction & mental-health directory — facilities, therapists, expert Q&A.

OtherOther

Responded338 ms14 / 22
Settlement Claim Finder

Open US class action settlements you may claim, with deadlines, payouts and official claim links.

OtherOther

Outdated check338 ms14 / 22
prefrosh.ai

College admissions: admit rates by round, your odds, compare colleges, and a mock admissions game.

OtherOther

Responded339 ms14 / 22
Modulit Pro AV Finder

Search Modulit EU and Polish pro AV equipment and guides, size cable runs and configure AV hardware.

OtherData access / search

Outdated check339 ms14 / 22
Pixelworkers

Read-only connector to pixelworkers.org: search and read guides, list services, start a quote.

OtherData access / search

Responded340 ms14 / 22
Mandarin 3D

Quote, price and order custom 3D prints (PLA) shipped anywhere in the US.

OtherOther

Responded340 ms14 / 22
Plateop vehicle check

Free used-car facts from the official register (NL, GB, IL, IS, DK) with source and date.

OtherOther

Outdated check340 ms14 / 22
pound.one

UK inflation, take-home pay and public spending calculators with sources and shareable results.

OtherOther

Responded341 ms14 / 22
Muralists Directory

Search the curated directory of professional muralists and street artists in Europe.

OtherData access / search

Responded341 ms14 / 22

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