MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

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.

Connect your agent

18491 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
Data Baltimore

DataBaltimore MCP — Baltimore open data (data.baltimorecity.gov, ArcGIS REST API).

Developer ToolsCode & DevOps

Responded98 ms15 / 22
Airnow

EPA AirNow MCP — official US current + forecast AQI, keyless, from AirNow's public file products…

Developer ToolsCode & DevOps

Responded98 ms15 / 22
Mozilla Observatory

MDN HTTP Observatory — grade any website's HTTP security headers and get the specific fixes, from…

Developer ToolsCode & DevOps

Responded98 ms15 / 22
Confluence

Confluence MCP — wraps the Confluence Cloud REST API v2 (OAuth)

Developer ToolsCode & DevOps

Responded99 ms15 / 22
Bart

BART MCP — San Francisco Bay Area Rapid Transit real-time data (api.bart.gov)

Developer ToolsCode & DevOps

Responded99 ms15 / 22
Alienvault Otx

AlienVault OTX MCP — Open Threat Exchange (free with key)

Developer ToolsCode & DevOps

Responded99 ms15 / 22
Mo Dmv

Missouri DMV MCP — the Department of Revenue's driver and motor-vehicle license offices, with…

Developer ToolsCode & DevOps

Responded99 ms15 / 22
Noaa Ncei

NOAA NCEI MCP — the national climate archive, via the keyless Access services

Developer ToolsCode & DevOps

Responded99 ms15 / 22
Myhealthfinder

MyHealthfinder MCP — U.S. preventive-services & health-screening guidance from ODPHP / health.gov…

Developer ToolsCode & DevOps

Responded99 ms15 / 22
Lobsters

Lobsters MCP — stories and discussions from lobste.rs

Developer ToolsCode & DevOps

Responded99 ms15 / 22
Data Nashville

DataNashville MCP — Nashville open data (data.nashville.gov, ArcGIS REST API).

Developer ToolsCode & DevOps

Responded100 ms15 / 22
Cta

CTA MCP — Chicago Transit Authority real-time trains ('L') + buses

Developer ToolsCode & DevOps

Responded100 ms15 / 22
Coresignal

Coresignal MCP — LinkedIn-adjacent company + employee data (coresignal.com)

Developer ToolsCode & DevOps

Responded100 ms15 / 22
Copernicus Dataspace

European Sentinel and Copernicus Contributing Mission archive from the EU's Copernicus Data Space…

Developer ToolsCode & DevOps

Responded100 ms15 / 22
Bright Data

Bright Data MCP — Bright Data Web Unlocker + SERP API (brightdata.com)

Developer ToolsCode & DevOps

Responded100 ms15 / 22
N2yo

N2YO MCP — wraps the N2YO Satellite Tracking REST API (n2yo.com)

Developer ToolsCode & DevOps

Responded100 ms15 / 22
Data Montgomery

DataMontgomeryCountyMD MCP — Montgomery County, MD open data (data.montgomerycountymd.gov, Socrata…

Developer ToolsCode & DevOps

Responded101 ms15 / 22
Marginalia

Marginalia MCP — independent web search over a non-commercial, non-SEO index.

Developer ToolsData access / search

Responded101 ms15 / 22
Dailymed

DailyMed MCP — FDA Structured Product Labels via NLM

Developer ToolsCode & DevOps

Responded102 ms15 / 22
Copernicus Cds

The Copernicus Climate Data Store (C3S/ECMWF) catalogue — browse or search the ~140 published…

Developer ToolsCode & DevOps

Responded102 ms15 / 22
Airtable

Airtable MCP Pack — wraps the Airtable REST API v0

Developer ToolsCode & DevOps

Responded102 ms15 / 22
Data Denver

DataDenver MCP — Denver open data (opendata-geospatialdenver.hub.arcgis.com, ArcGIS REST API).

Developer ToolsCode & DevOps

Responded103 ms15 / 22
Crawlbase

Crawlbase MCP — wraps the Crawlbase Crawling API (crawlbase.com, formerly ProxyCrawl). One…

Developer ToolsCode & DevOps

Responded103 ms15 / 22
Censys

Censys MCP — internet-scan search over the Censys Platform API (censys.com)

Developer ToolsCode & DevOps

Responded103 ms15 / 22

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