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
cern-inspire-mcp-server

Search INSPIRE-HEP papers, authors, experiments, HEPData records; get citation metrics and BibTeX.

Developer ToolsCode & DevOps

Outdated check944 ms14 / 22
geonames-mcp-server

Search GeoNames places, walk admin hierarchies, reverse geocode, get postal codes and country info.

Developer ToolsCode & DevOps

Outdated check948 ms14 / 22
Kopp Real Estate München

Munich real estate: market prices by district, current listings, free valuation and search requests.

Real Estate & PropertyData access / search

Responded949 ms14 / 22
io.github.cyanheads/art-institute-chicago-mcp-server

Search the Art Institute of Chicago collection: artworks, artists, exhibitions, and audio guides.

MediaCode & DevOps

Outdated check953 ms14 / 22
Pakki Packaging Brand Directory

Search source-backed U.S. flexible packaging brand directories. Free, read-only, no API key.

OtherData access / search

Responded962 ms14 / 22
io.github.cyanheads/browser-compat-mcp-server

Browser compatibility and Baseline status for any web feature — offline, from bundled MDN data.

Developer ToolsCode & DevOps

Outdated check963 ms14 / 22
io.github.cyanheads/usda-mcp-server

Search foods, compare nutrients, and look up the full USDA FoodData Central database.

Developer ToolsData access / search

Outdated check971 ms14 / 22
Realmint

Agent-native scoring, search and routing for tokenized real-world assets across multi-chain.

Developer ToolsCode & DevOps

Responded975 ms14 / 22
chat.avva/catalog

Search Avva for an expert, then connect their model - judgment from real past decisions.

OtherData access / search

Responded980 ms14 / 22
io.github.cyanheads/pubchem-mcp-server

Search PubChem compounds, properties, safety data, bioactivity, and cross-references.

Developer ToolsCode & DevOps

Outdated check999 ms14 / 22
saaskr — Korean SaaS Directory (한국 SaaS 디렉토리)

Korean SaaS directory: search 3,700+ services, find Korean API/MCP tools and AI API providers.

Developer ToolsData access / search

Responded1001 ms14 / 22
SPACEXPLORATION

Search commercial real estate listings. Reads need no token; authoring is self-serve OAuth (DCR).

Real Estate & PropertyData access / search

Responded1002 ms14 / 22
io.github.worklore/worklore

Search worklore stories and x-ray any skill or story capability tier (T0-T4) before you run it.

Developer ToolsCode & DevOps

Outdated check1003 ms14 / 22
io.github.cyanheads/noaa-climate-mcp-server

Search NOAA climate stations and datasets, fetch historical weather observations.

Data & AnalyticsCode & DevOps

Outdated check1007 ms14 / 22
io.github.cyanheads/reliefweb-mcp-server

Search ReliefWeb humanitarian reports, disasters, jobs, training, and country profiles via MCP.

Developer ToolsCode & DevOps

Outdated check1008 ms14 / 22
AgentStatus MCP Index

Live public MCP Index. Search, recommend, and call healthy MCP servers.

Developer ToolsCode & DevOps

Outdated check1014 ms14 / 22
HadithDB

Search and retrieve Quran ayahs, tafsir commentary, hadith, and detailed hadith records.

Developer ToolsCode & DevOps

Outdated check1020 ms14 / 22
io.github.cyanheads/fbi-crime-mcp-server

FBI Crime Data Explorer — offense rates, hate crime, arrests, NIBRS, LEOKA stats, agency search.

Developer ToolsCode & DevOps

Outdated check1022 ms14 / 22
OlaChill Japan Travel

Search and price Japan tours, tickets, ryokan, transfers, charter buses, helicopters, golf and eSIM.

TravelData access / search

Responded1023 ms14 / 22
io.github.cyanheads/faa-airmen-registry-mcp-server

Search FAA airmen certificates, ratings, and informational medical records.

HealthcareCode & DevOps

Outdated check1026 ms14 / 22
Community Funding NZ

Search 380+ New Zealand community grant funders, deadlines and application questions. No login.

Developer ToolsCode & DevOps

Outdated check1027 ms14 / 22
ToolsMonk tool catalog

Find the right ToolsMonk tool for a task: 255 free browser-based tools, read-only lookups.

OtherData access / search

Responded1028 ms14 / 22
apMZoomAI · Dongdaemun wholesale

Search Dongdaemun (Seoul) wholesale fashion items, new arrivals and stalls on apMZoomAI.

OtherData access / search

Outdated check1028 ms14 / 22
Deepsky Aviation Regulations

Free no-key search over CASA, FAA, EASA & ICAO aviation regulations. By Deepsky (deepskyai.com).

LegalData access / search

Outdated check1031 ms14 / 22

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