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

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Remote MCP servers

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18413 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
Serper

Serper MCP — wraps the Serper Google Search API (serper.dev)

Developer ToolsCode & DevOps

Responded77 ms15 / 22
Senate Lobbying

US Senate Lobbying Disclosure (LDA) MCP.

Developer ToolsCode & DevOps

Responded77 ms15 / 22
Scryfall

Scryfall MCP — Magic: The Gathering card database. Keyless. Scryfall requires a User-Agent and…

Developer ToolsDatabase

Responded77 ms15 / 22
Poland Tenders

Poland public procurement MCP — official e-Zamówienia notice feed (keyless).

Developer ToolsCode & DevOps

Responded77 ms15 / 22
Phillips

Phillips MCP — realized auction prices from phillips.com.

Developer ToolsCode & DevOps

Responded77 ms15 / 22
Oqmd

OQMD (Open Quantum Materials Database) MCP.

Developer ToolsDatabase

Responded77 ms15 / 22
Nps

NPS MCP — US National Park Service (free key, generous limits)

Developer ToolsCode & DevOps

Responded77 ms15 / 22
Mapillary

Mapillary MCP — wraps the Mapillary Graph API (graph.mapillary.com)

Developer ToolsCode & DevOps

Responded77 ms15 / 22
Wikifeed

Wikifeed MCP — wraps Wikimedia Feed API (free, no auth)

Developer ToolsCode & DevOps

Responded78 ms15 / 22
Walkscore

Walk Score MCP — wraps the Walk Score API (walkscore.com)

Developer ToolsCode & DevOps

Responded78 ms15 / 22
Vessel Tracking

Vessel Tracking — live worldwide ship positions from AIS.

Developer ToolsCode & DevOps

Responded78 ms15 / 22
Vendor Signals

Vendor documentation and changelog change-tracking as ACCOUNT SIGNALS (fleet #545).

Developer ToolsFile & docs

Responded78 ms15 / 22
Pa Dmv

Pennsylvania DMV MCP — registered vehicles and electric-vehicle adoption by county and by ZIP…

Developer ToolsCode & DevOps

Responded78 ms15 / 22
Openfoodtox

EFSA OpenFoodTox — the reference values EFSA has derived for chemical substances in food and feed…

Developer ToolsCode & DevOps

Responded78 ms15 / 22
Ygoprodeck

YGOPRODeck MCP — Yu-Gi-Oh! trading card game (TCG) database. Keyless. Sends a User-Agent. Base…

Developer ToolsPayments & trading

Responded79 ms15 / 22
Weather

Weather MCP — wraps Open-Meteo API (free, no auth)

Developer ToolsCode & DevOps

Responded79 ms15 / 22
Valorant

VALORANT reference data MCP (valorant-api.com).

Developer ToolsCode & DevOps

Responded79 ms15 / 22
Open Notify

Open Notify MCP — ISS position + people in space

Developer ToolsCode & DevOps

Responded79 ms15 / 22
Ofr Funding

OFR Short-Term Funding Monitor API — data.financialresearch.gov/v1, keyless, no auth wall. The…

Developer ToolsCode & DevOps

Responded79 ms15 / 22
Malwarebazaar

MalwareBazaar MCP — abuse.ch malware sample database (free, key required)

Developer ToolsDatabase

Responded79 ms15 / 22
Vizier

VizieR MCP — CDS astronomical catalogue access.

Developer ToolsCode & DevOps

Responded80 ms15 / 22
Usgs Mrdata

USGS MRData MCP — the Mineral Resources Data System (MRDS)

Developer ToolsCode & DevOps

Responded80 ms15 / 22
Usgs Earthquakes

USGS Earthquake Catalog MCP (FDSNWS event API).

Developer ToolsCode & DevOps

Responded80 ms15 / 22
Unhcr

UNHCR Refugee Data Finder MCP (keyless).

Developer ToolsCode & DevOps

Responded80 ms15 / 22

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