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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5822 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
DatoQA — Official Public Holidays

Government and OpenHolidays calendars: regional scope, multilingual names, dated sources and gaps.

GovernmentData access / search

Outdated check109 ms13 / 22
RottenAds affiliate offers

Search CPL/CPA affiliate offers (telehealth, finance, insurance); apply as publisher or advertiser.

Marketing & SalesData access / search

Outdated check110 ms13 / 22
FridgeBase (US)

Search, filter and compare fridges on FridgeBase, with DOE and ENERGY STAR data where certified.

OtherData access / search

Responded111 ms13 / 22
today.solarstorm/solarstorm

Space weather: Kp index, NOAA 3-day geomagnetic forecast, solar flares, aurora visibility.

Data & AnalyticsData access / search

Responded111 ms13 / 22
Watermelon UI

Search free React, Tailwind, and shadcn components, blocks, and dashboards; get installable source.

Data & AnalyticsData access / search

Responded111 ms13 / 22
Manchester Tonight

What's on in Manchester: search gigs, club nights, theatre, events and venues. Read-only, no auth.

OtherData access / search

Outdated check111 ms13 / 22
TheAIMeters

Read-only AI impact metrics with search, methodology and cited sources. No authentication required.

Data & AnalyticsData access / search

Outdated check112 ms13 / 22
Reevl — Korean Real Estate

Korean apartment data: official transaction prices, jeonse ratios, AI forecasts. 45,000+ complexes.

Real Estate & PropertyData access / search

Outdated check113 ms13 / 22
geld machen x402 agent utilities

x402 pay-per-call agent tools (Base USDC): web search, URL extract, OCR, Base tx & allowance scans

Finance & CryptoData access / search

Outdated check113 ms13 / 22
Commercial Property Today: CRE market data

CRE market data: Treasury, SOFR, bank CRE delinquency, CMBS, prices and cap rates, sourced.

Finance & CryptoData access / search

Outdated check115 ms13 / 22
ToolNav AI

Search AI tools, browse categories and read tool details with source links. Free, read-only access.

OtherData access / search

Responded116 ms13 / 22
Whatic IC Datasheets

IC datasheet search: parametric part finding, spec lookup, price comparison — grounded in real PDFs.

OtherData access / search

Outdated check116 ms13 / 22
dieAnalysten Adressshop – German B2B company addresses

German B2B company addresses: search industries, count target groups, get EUR prices, order.

OtherData access / search

Responded117 ms13 / 22
SpinHire iGaming Jobs

Live iGaming jobs — casino, betting, studios, affiliates — plus market data. No auth.

Finance & CryptoData access / search

Responded117 ms13 / 22
entityindex.ai

Verified hotels in Andorra for AI agents: search by area, spa, pets, ski-in, family; official links.

TravelData access / search

Responded118 ms13 / 22
Foxfind

Affiliate price routing for high-intent PC game purchases across authorized stores.

Marketing & SalesData access / search

Outdated check118 ms13 / 22
obrotomierz open data

Polish savings bonds, retail bonds in 195 countries, EU bank account bonuses. Open data, CC BY 4.0.

E-commerceData access / search

Outdated check119 ms13 / 22
whatmount — TV and monitor mount facts

VESA pattern, dimensions and weight per TV or monitor model, from the makers' manuals. Read-only.

OtherData access / search

Outdated check120 ms13 / 22
PPN Hub — public APIs over MCP

One MCP endpoint over 69 public PPN APIs: search_apis to discover, execute_api to call. Free tier.

Developer ToolsData access / search

Responded121 ms13 / 22
AlertaSubastas

Search Spain's public auctions (BOE, Social Security, tax agency, notaries) with full asset records.

Finance & CryptoData access / search

Responded121 ms13 / 22
Agentify — search engine for AI agents

Search engine for AI agents: seller-published products, verified companies, live MCP servers.

Developer ToolsData access / search

Responded121 ms13 / 22
Per Patient Day: SNF benchmarks and valuation math

Skilled nursing benchmarks by state from CMS cost reports, plus SNF valuation and DSCR math.

HealthcareData access / search

Outdated check121 ms13 / 22
Remotejobify

Search remote jobs by the country you live in, each with the line that proves you can apply.

OtherData access / search

Responded123 ms13 / 22
Outdated check123 ms13 / 22

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