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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5041 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
io.github.cyanheads/cern-opendata-mcp-server

Search CERN Open Data, fetch records, files, analysis environments, CMS good-run lists, HLT paths.

Developer ToolsCode & DevOps

Outdated check1048 ms14 / 22
io.github.cyanheads/federal-regulations-mcp-server

Search and trace US federal rules across the Federal Register, eCFR, and Regulations.gov.

LegalCode & DevOps

Outdated check1050 ms14 / 22
Wikimedia Enterprise docs

Wikimedia Enterprise API docs: search the guides, read every endpoint. Read-only, no account needed.

OtherData access / search

Responded1051 ms14 / 22
io.github.cyanheads/musicbrainz-mcp-server

Search MusicBrainz artists, releases, works, labels; resolve ISRC/ISWC/barcode; fetch cover art.

Developer ToolsCode & DevOps

Outdated check1051 ms14 / 22
Ithy Research Library

Search public Ithy explanations and read relevant passages with article links, sources and dates.

OtherData access / search

Responded1053 ms14 / 22
The Ranking Factory site check

Free, no sign-in: checks a website's readiness for AI search and lists what it found.

OtherData access / search

Responded1054 ms14 / 22
io.github.cyanheads/fdic-banks-mcp-server

Search FDIC-insured banks, Call Report financials, peer rankings, failures, mergers, deposit share.

Developer ToolsCode & DevOps

Outdated check1054 ms14 / 22
io.github.cyanheads/eur-lex-mcp-server

Search EU legislation, CJEU case law, and treaties; traverse CELLAR graph; browse EuroVoc concepts.

LegalCode & DevOps

Outdated check1054 ms14 / 22
io.github.cyanheads/epa-mcp-server

Search EPA compliance, TRI, Superfund, drinking-water, EJScreen, and AirNow data.

Developer ToolsCode & DevOps

Outdated check1056 ms14 / 22
io.github.cyanheads/clinicaltrialsgov-mcp-server

Search ClinicalTrials.gov: find studies, retrieve results, match patients to candidate trials.

HealthcareCode & DevOps

Outdated check1056 ms14 / 22
LLMready

Audit websites for AI search readiness and generate or validate llms.txt. Free quick check.

OtherData access / search

Responded1060 ms14 / 22
kiddinglab

Search DC/MD/VA kids' camps: dates, prices, ages, live availability, checkout links. Parents pay.

Finance & CryptoPayments & trading

Responded1072 ms14 / 22
io.github.cyanheads/inaturalist-mcp-server

Search iNaturalist sightings, identification threads, phenology, and look-alike species.

Developer ToolsCode & DevOps

Outdated check1074 ms14 / 22
io.github.cyanheads/eurostat-mcp-server

Search and query the Eurostat catalogue — EU economy, demography, trade, and NUTS regional data.

Developer ToolsCode & DevOps

Outdated check1074 ms14 / 22
unesco-heritage-mcp-server

Search UNESCO World Heritage sites, intangible heritage, biosphere reserves, and Global Geoparks.

Developer ToolsCode & DevOps

Outdated check1074 ms14 / 22
Christian Tech Jobs

Search current job listings on Christian Tech Jobs and read each one.

OtherData access / search

Responded1084 ms14 / 22
A1 Synthetic Oil (independent AMSOIL dealer)

AMSOIL catalog search, account options, and dealer-referral shopping links from A1 Synthetic Oil

E-commerceData access / search

Responded1084 ms14 / 22
search-mcp

Web search and clean-text page fetch for AI agents, with SSRF protection.

Developer ToolsData access / search

Responded1086 ms14 / 22
io.github.cyanheads/college-scorecard-mcp-server

Search, compare, and analyze U.S. college data — costs, earnings, programs, and outcomes.

Developer ToolsCode & DevOps

Outdated check1086 ms14 / 22
Daylily Catalog

Search daylily catalogs and cultivar traits. Manage your grower catalog with scoped OAuth.

Developer ToolsCode & DevOps

Outdated check1096 ms14 / 22
Harness Atlas

Search 650+ wire-harness & cable-assembly manufacturers and production & test equipment suppliers.

Developer ToolsCode & DevOps

Outdated check1099 ms14 / 22
io.github.cyanheads/pubmed-mcp-server

Search PubMed/Europe PMC, fetch articles and full text (PMC/EPMC/Unpaywall), citations, MeSH terms.

Developer ToolsCode & DevOps

Outdated check1099 ms14 / 22
Triremes

Search real problems people have and business websites with poor SEO/AEO. Read-only, free.

Marketing & SalesData access / search

Responded1108 ms14 / 22
AgentIndex

Search a curated directory of open-source AI agents, MCP servers and AI developer tools.

Developer ToolsData access / search

Responded1116 ms14 / 22

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