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

619 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
com.commsharbor/commsharbor

Managed domain email without running a mail stack. Free DNS checks; monthly mailbox packages.

ProductivityCommunication & messaging

Outdated check905 ms14 / 22
io.carrierscore/carrierscore

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

Developer ToolsMonitoring & observability

Outdated check965 ms14 / 22
io.github.cyanheads/devops-status-mcp-server

Vendor status pages, TLS cert inspection, DNS propagation checks, and incident-response playbooks.

Developer ToolsCode & DevOps

Outdated check1123 ms14 / 22
drwho.me network and developer tools

29 free tools: DNS, email auth (SPF, DKIM, DMARC), TLS, headers, WHOIS, dev utils.

ProductivityCommunication & messaging

Outdated check1407 ms14 / 22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
SpreadBench NCSX-IS — AI Infrastructure Bond Issuance Spread Index

AI-infrastructure bond issuance-spread index (NCSX-IS): 13 bonds, 2 tiers, 14 free MCP tools.

Developer ToolsCode & DevOps

Responded1212 ms14 / 22
Cloudflare Radar

Cloudflare Radar MCP — internet observatory (traffic, attacks, BGP, quality)

Developer ToolsCode & DevOps

Responded6116 ms14 / 22
Earth Search

Sentinel and Landsat imagery catalogue from Element 84's Earth Search over the AWS Open Data…

Developer ToolsCode & DevOps

Responded6139 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
Domain & Company Intel MCP

Domain intel for AI agents: RDAP registration, DNS, email deliverability, tech stack.

ProductivityCommunication & messaging

Outdated check46 ms13 / 22
Merlonix Monitoring

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

Developer ToolsMonitoring & observability

Outdated check49 ms13 / 22
SteadySite

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

Developer ToolsMonitoring & observability

Outdated check51 ms13 / 22
co.vantaj/mcp-server

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

Developer ToolsMonitoring & observability

Outdated check61 ms13 / 22
heade.rs

Look up any domain, IP address or AS number: hosting, DNS, registration, email, TLS and headers.

ProductivityData access / search

Outdated check61 ms13 / 22
WebUpCheck — DNS, Website & Provider Diagnostics

DNS comparison, Claude and cloud components/incidents, and website diagnostics. Free; no API key.

Developer ToolsAI / LLM tooling

Outdated check61 ms13 / 22
io.github.Integrity-Os/deliverability-doctor

Check if a domain can be email-spoofed: SPF, DMARC, DKIM, MX graded from public DNS. Authless.

Developer ToolsCommunication & messaging

Outdated check62 ms13 / 22
Northline WebKit

Pay-per-call web tools for agents: URL to markdown, metadata, links, DNS, email/domain checks, RDAP.

ProductivityCommunication & messaging

Outdated check64 ms13 / 22
Reg Monitoring

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

OtherMonitoring & observability

Outdated check67 ms13 / 22
io.domaindrift/domaindrift

Signed internet telemetry, read-only: DNS, TLS, WHOIS, reachability. Every record Ed25519-signed.

Developer ToolsCode & DevOps

Outdated check68 ms13 / 22
DomChecker

Domain availability, WHOIS and DNS for any TLD (.ru, .рф, .com…), straight from registries.

Developer ToolsCode & DevOps

Outdated check81 ms13 / 22
net.lawyerd/takedown

DMCA takedown & host reveal for AI agents: who hosts an infringing URL, even behind Cloudflare.

Developer ToolsCode & DevOps

Outdated check91 ms13 / 22
Front Sentinel

Read-only security checks for dApp domains: registry lock, DNSSEC, CAA, SRI, SEAL DNS controls

Developer ToolsCode & DevOps

Outdated check91 ms13 / 22

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