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
FabTally Chain

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

Finance & CryptoMonitoring & observability

Outdated check96 ms13 / 22
isitdns

Is it DNS? Audit a site or domain that isn't working: one call says if it resolves and why. No key.

Developer ToolsCode & DevOps

Outdated check105 ms13 / 22
Feranor Resilience

Scan/purge hidden text & score web domains: TLS, DNS, headers, speed. Free scans, $0.01 actions.

Developer ToolsCode & DevOps

Outdated check105 ms13 / 22
Sundogs

Mini apps your coding agent installs into your own Cloudflare site

Developer ToolsCode & DevOps

Outdated check107 ms13 / 22
PeppolStatus

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

Marketing & SalesMonitoring & observability

Outdated check108 ms13 / 22
UmbHost Knowledgebase

Search and read UmbHost help articles: GreenStack, Umbraco hosting, DNS, email, SSL and more.

ProductivityCommunication & messaging

Outdated check117 ms13 / 22
io.github.stillmarcus24/stillos-notary-mcp

Attestation infrastructure for the agentic economy: signed, independently verifiable verdicts.

Developer ToolsCode & DevOps

Outdated check124 ms13 / 22
Cloud FinOps Skill & MCP

Cloud cost + FinOps knowledge for AI agents: AWS/Azure/GCP optimisation, AI spend, waste playbooks.

Developer ToolsCode & DevOps

Outdated check128 ms13 / 22
OrionCMD Checks

Domain threat checks, a 30-day domain watch, TLS/DNS/email-auth checks and a $2 site audit (x402).

ProductivityCommunication & messaging

Outdated check130 ms13 / 22
SatsDNS

DNS hosting, secondary DNS and dynamic DNS paid per call in sats; optional Nostr account tools.

Developer ToolsCode & DevOps

Outdated check138 ms13 / 22
io.github.stillmarcus24/stillos-kya

Counterparty due-diligence infrastructure: OFAC screening, on-chain risk, signed verdicts.

Finance & CryptoCode & DevOps

Outdated check143 ms13 / 22
DC5 WHOIS

WHOIS, RDAP, DNS, IP / ASN / CIDR and Web3 name (ENS, Unstoppable, Handshake) lookups. No API key.

Developer ToolsData access / search

Outdated check148 ms13 / 22
Uptimeify

Free anonymous website, DNS, email and TLS checks, plus monitor read and opt-in write access.

ProductivityCommunication & messaging

Outdated check200 ms13 / 22
Upgrade Brief

Breaking changes between two versions: npm, PyPI, GitHub Actions, Helm, Terraform, crates.io, Go.

Developer ToolsCode & DevOps

Outdated check221 ms13 / 22
MoneyTools x402 agent toolkit

39 agent tools: x402 pay gateway, precheck, token safety, tx decode, DNS; credits or 30-day plan

Finance & CryptoPayments & trading

Outdated check221 ms13 / 22
MX Verdict

Free, read-only email and DNS checks: SPF, DKIM, DMARC, MX, DNS records, blocklists, domain health.

ProductivityCommunication & messaging

Outdated check243 ms13 / 22
AttackerView quick website security check

Passive security check of a domain: headers, TLS, DNS and email authentication. No login needed.

ProductivityCommunication & messaging

Outdated check247 ms13 / 22
GreenlandAI

The physical world as queryable data: companies, deposits, infrastructure, projects and commodities.

OtherOther

Outdated check289 ms13 / 22
io.github.jdhart81/subscriptions

Verified monthly-seat catalog, account attribution, quota, overage, and MRR infrastructure.

Developer ToolsPayments & trading

Outdated check351 ms13 / 22
GCP Billing

Google Cloud Billing BigQuery export reporting through a user-connected service account.

Finance & CryptoPayments & trading

Outdated check353 ms13 / 22
AWS Billing

AWS Cost Explorer cost, forecast, and anomaly reporting through user-connected IAM credentials.

Finance & CryptoPayments & trading

Outdated check353 ms13 / 22
MailVakt

Use when email lands in spam: audits SPF, DKIM, DMARC, MX and returns the DNS records to fix it.

ProductivityCommunication & messaging

Outdated check362 ms13 / 22
thenetworkery

DNS, email auth, TLS, BGP/RPKI, WHOIS and subnet tools with plain-English fixes, plus webhook URLs.

ProductivityCommunication & messaging

Outdated check370 ms13 / 22
io.github.dotmoosehosting/dotmoose-tools

Public DNS, mail, TLS, and web diagnostics plus Looking Glass probes via remote MCP.

Developer ToolsCode & DevOps

Outdated check425 ms13 / 22

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