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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18444 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/usitc-tariffs-mcp-server

Search USITC tariff schedules, inspect heading trees, and look up published duty rates.

Developer ToolsData access / search

Responded917 ms15 / 22
com.savvly/savvly

Savvly MCP: query fund data, model projections, and compare against alternative retirement products.

Developer ToolsCode & DevOps

Responded918 ms15 / 22
Agent Evidence API

Cited web evidence and fact checking for AI agents. $0.01 per call, no API key.

Developer ToolsCode & DevOps

Responded918 ms15 / 22
io.github.cyanheads/ensembl-mcp-server

Look up genes, sequences, variants, homologs, and cross-database xrefs from Ensembl REST.

Developer ToolsData access / search

Responded919 ms15 / 22
Kourier

Discover flat-rate DeepSeek plans, model limits, API-key instructions, and coding-client setup.

Developer ToolsCode & DevOps

Responded919 ms15 / 22
io.github.cyanheads/orcid-mcp-server

Researcher profiles, works, affiliations, funding, and peer reviews from the ORCID registry.

Developer ToolsCode & DevOps

Responded922 ms15 / 22
io.github.cyanheads/cyanheads-mcp-server

Fleet discovery for the cyanheads MCP ecosystem — semantic search + install snippets.

Developer ToolsCode & DevOps

Responded923 ms15 / 22
io.github.cyanheads/libofcongress-mcp-server

Search LOC digital collections, Chronicling America newspapers (full OCR), and LC Subject Headings.

Developer ToolsCode & DevOps

Responded926 ms15 / 22
io.github.cyanheads/earthquake-mcp-server

Search USGS and EMSC seismic data — real-time feeds, event queries, and earthquake counts.

Developer ToolsCode & DevOps

Responded927 ms15 / 22
io.github.cyanheads/npi-providers-mcp-server

Search NPPES providers and resolve NUCC specialty codes via MCP over STDIO or Streamable HTTP.

Developer ToolsCode & DevOps

Responded928 ms15 / 22
io.github.cyanheads/nhtsa-vehicle-safety-mcp-server

Decode VINs, search recalls, complaints, crash ratings, and investigations.

Developer ToolsCode & DevOps

Responded928 ms15 / 22
io.github.cyanheads/aviation-weather-mcp-server

METARs, TAFs, PIREPs, domestic/international SIGMETs and CWAs via NWS AWC. AIRMETs not served.

Developer ToolsCode & DevOps

Responded928 ms15 / 22
io.github.cyanheads/openchargemap-mcp-server

Find EV charging stations, detail, and reliability check-ins via the global Open Charge Map.

Developer ToolsCode & DevOps

Responded929 ms15 / 22
uk.co.currentannuityrates/site

Current Annuity Rates: the site's own MCP server — calculator, enquiry (enquiry = a human...

Developer ToolsCode & DevOps

Responded931 ms15 / 22
Korea Business Verify (KBV)

Korea import requirements by HS code, plus Korean company lookup by name, status and KYB checks.

Developer ToolsCode & DevOps

Responded931 ms15 / 22
ARUON Research

Sourced, analyst-released CRE site and land screens. Order and pay by card or USDC on Base.

Developer ToolsCode & DevOps

Responded932 ms15 / 22
Responded934 ms15 / 22
io.github.cyanheads/uk-police-crime-mcp-server

Search UK street crime, outcomes, stop and search, and neighbourhood teams (Scotland: BTP only).

Developer ToolsCode & DevOps

Responded934 ms15 / 22
io.github.cyanheads/datacite-mcp-server

Search DataCite datasets and software, fetch DOI metadata, trace relations, format citations.

Developer ToolsCode & DevOps

Responded935 ms15 / 22
PendingDelete.net

Search pending delete and recently dropped domain names, with drop times, Rank and Linking Domains.

Developer ToolsData access / search

Responded937 ms15 / 22
Weather

US NWS weather alerts and 5-day forecasts for AI agents. $0.01 per call.

Developer ToolsCode & DevOps

Responded937 ms15 / 22
HemmaBo Host Booking Engine

6 runtime tools: 2 HemmaBo tools, 2 host onboarding tools, and 2 VRP verification tools. Not an OTA.

Developer ToolsCode & DevOps

Responded939 ms15 / 22
PeriodFinder

Neutral cross-brand period-underwear comparison: absorbency in real mL, plus size translation.

Developer ToolsCode & DevOps

Responded941 ms15 / 22
lucid.page

Publish Markdown from any agent: POST Markdown, get a gorgeous shareable URL.

Developer ToolsFile & docs

Responded944 ms15 / 22

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