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.

Connect your agent

324 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
API Status Check

Live status probes plus published uptime and incident history for 280+ APIs and cloud services.

Developer ToolsMonitoring & observability

Responded808 ms14 / 22
Rust Crate Security Advisories — buy per-query in-session (rustsecwatch)

Rust crate vulns: CVEs, patched versions. $0.01/query. Be born in one call — free testnet funds.

SecurityMonitoring & observability

Responded910 ms14 / 22
Ubuntu Security Notices / USN (usnwatch) — buy per-query in-session

Ubuntu security: USNs per CVE, patched versions. Be born in one call — free testnet funds.

SecurityMonitoring & observability

Responded936 ms14 / 22
io.carrierscore/carrierscore

FMCSA motor-carrier risk scores, monitoring, and carrier-selection evidence reports for AI agents.

Developer ToolsMonitoring & observability

Responded965 ms14 / 22
Cybersecurity News & Breach Alerts — buy per-query in-session (bleepingwatch)

Cybersecurity news & breach alerts: hacks, patches. Be born in one call — free testnet funds.

SecurityMonitoring & observability

Responded1068 ms14 / 22
CERT-FR Security Advisories — buy per-query in-session (certfrwatch)

CERT-FR (ANSSI) security advisories & alerts: French national CERT vulnerability feed, hourly

SecurityMonitoring & observability

Responded1095 ms14 / 22
CISA Cybersecurity & ICS Advisories — buy per-query in-session (cisaalerts)

CISA advisories & ICS alerts: new CVEs, remediation. Be born in one call — free testnet funds.

SecurityMonitoring & observability

Responded1337 ms14 / 22
CISA Known Exploited Vulnerabilities (kevwatch)

CISA KEV catalog: active-exploit alerts, hourly. Be born in one call — free testnet funds.

SecurityMonitoring & observability

Responded2336 ms14 / 22
iGods GEO Visibility Tool (GVT)

GEO visibility tests, score trends, sitemap discovery, and domain monitoring for AI agents.

Developer ToolsMonitoring & observability

Responded6794 ms14 / 22
Hpms Aadt

FHWA, Highway Performance Monitoring System (HPMS): annual average daily traffic (AADT) per…

Developer ToolsMonitoring & observability

Responded148 ms14 / 22
Epa Aqs

EPA AQS MCP — the Air Quality System, EPA's regulatory-grade air monitoring archive

Data & AnalyticsMonitoring & observability

Responded6145 ms14 / 22
TLS Radar

SSL/TLS scanning, free Let's Encrypt issuance, and certificate-expiry monitoring.

OtherMonitoring & observability

Responded6964 ms14 / 22
Merlonix Monitoring

Monitoring for agencies — uptime, SSL, DNS, blocklists, AI visibility, MCP health. 8 no-auth tools.

Developer ToolsMonitoring & observability

Responded49 ms13 / 22
SteadySite

Check SSL certificate and domain expiry for any site, see plans, and get a monitoring sign-up link.

Developer ToolsMonitoring & observability

Responded51 ms13 / 22
co.vantaj/mcp-server

Vantaj uptime monitoring via MCP - manage monitors, heartbeats, incidents, and status pages.

Developer ToolsMonitoring & observability

Responded61 ms13 / 22
P0: email check, uptime, web reader

Email address checks, URL uptime pings and web page to markdown for agents, pay per call

ProductivityMonitoring & observability

Responded66 ms13 / 22
Reg Monitoring

Financial regulatory updates, deadlines and enforcement actions from regulators worldwide.

OtherMonitoring & observability

Responded67 ms13 / 22
FabTally Chain

On-chain monitoring reads: ENS/Basename expiry, gas, token unlocks & Chainlink oracle health.

Finance & CryptoMonitoring & observability

Outdated check96 ms13 / 22
PeppolStatus

Peppol market intelligence and network monitoring: migrations, provider churn, leads, and uptime.

Marketing & SalesMonitoring & observability

Responded108 ms13 / 22
FlareWarden

Check if a site or service like Stripe is down, and monitor your sites, cron jobs and status pages.

Finance & CryptoMonitoring & observability

Responded149 ms13 / 22
ATK Security Checks

PQ TLS + cert checks; Wazuh rules tested on a real manager; PHP2Shell CVE check + fix steps

SecurityMonitoring & observability

Responded166 ms13 / 22
KrakenShield

Quick HTTPS/SSL check of any website, cybersecurity glossary and KrakenShield prices.

SecurityMonitoring & observability

Responded206 ms13 / 22
Threatist

Vulnerability records: CVE, GHSA, CISA KEV, EPSS and vendor fixes in one place. No key needed.

SecurityMonitoring & observability

Responded230 ms13 / 22
Hagglyai

Find the best pay-per-call API for any task: price, uptime and real usage across 19,000+ APIs.

OtherMonitoring & observability

Responded292 ms13 / 22

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