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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18442 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
Kilotest

Ensemble testing of web pages for accessibility, usability, and web standards

Developer ToolsCode & DevOps

Outdated check887 ms15 / 22
io.github.cyanheads/nonprofit-explorer-mcp-server

MCP server for nonprofit financials via ProPublica: IRS Form 990 data for 1.8M+ nonprofits.

Developer ToolsCode & DevOps

Responded888 ms15 / 22
net.hookpulse/hookpulse

Know when a job stops or a site goes down after the agent exits. Free monitors; paid extra coverage.

Developer ToolsCode & DevOps

Responded891 ms15 / 22
io.github.cyanheads/cdc-health-mcp-server

Search and query CDC public health data — mortality, vaccinations, surveillance, behavioral risk.

Developer ToolsCode & DevOps

Responded892 ms15 / 22
io.github.cyanheads/noaa-spaceweather-mcp-server

NOAA SWPC space weather: storm scales, Kp index, aurora forecasts, solar wind, activity, alerts.

Developer ToolsCode & DevOps

Responded894 ms15 / 22
com.dechonet/mcp

30 security tools for AI agents: phishing links, exposure maps, DNS, SSL, PQC, history, pivots.

Developer ToolsCode & DevOps

Responded894 ms15 / 22
io.github.cyanheads/reference-data-mcp-server

Countries, timezones, elements, constants, HTTP status codes, unit conversion, and MIME type lookup.

Developer ToolsCode & DevOps

Responded895 ms15 / 22
io.github.cyanheads/interpro-mcp-server

Search InterPro entries, map domains onto proteins and PDB structures, and scan raw sequences.

Developer ToolsCode & DevOps

Responded896 ms15 / 22
io.github.cyanheads/national-parks-mcp-server

Plan US National Park Service trips — parks, alerts, campgrounds, things to do, events.

Developer ToolsCode & DevOps

Responded903 ms15 / 22
io.github.cyanheads/biorxiv-mcp-server

Search and retrieve bioRxiv and medRxiv preprints — by DOI, date interval, or keyword — via MCP.

Developer ToolsCode & DevOps

Responded905 ms15 / 22
Assinafy

Send documents for legally valid e-signature in Brazil, track signers and download signed files.

Developer ToolsFile & docs

Outdated check908 ms15 / 22
StayingAsia

Entry rules, long stay routes and settlement answers for 21 Asian countries.

Developer ToolsCode & DevOps

Outdated check908 ms15 / 22
Bilig WorkPaper

Formula-backed WorkPaper tools for workbook readback, input edits, and JSON persistence.

Developer ToolsCode & DevOps

Responded911 ms15 / 22
io.github.cyanheads/fcc-broadband-mcp-server

FCC broadband availability, coverage analysis, and digital divide data for US geographies.

Developer ToolsCode & DevOps

Responded913 ms15 / 22
x402 Doctor

Is this x402/MPP API safe to pay? $0.001 preflight, fixes, a $0.25 test purchase. Free quick check.

Developer ToolsCode & DevOps

Outdated check913 ms15 / 22
uk.co.devexitfinance/site

Development Exit Finance: the site's own MCP server — enquiry (enquiry = a human handoff, not a...

Developer ToolsCode & DevOps

Responded917 ms15 / 22
Responded917 ms15 / 22
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

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