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.

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2887 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
Domain & Company Intel MCP

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

ProductivityCommunication & messaging

Outdated check46 ms13 / 22
Radar Agent Tools

8 no-key agent tools: web to Markdown, domain+email DNS, papers, US rules, trials, odds, CVEs

ProductivityCommunication & messaging

Outdated check48 ms13 / 22
Email Auth Checker

SPF, DKIM, DMARC, MTA-STS and domain-expiry checks for any domain, with SPF lookup counts.

ProductivityCommunication & messaging

Outdated check49 ms13 / 22
Shirabe Japan Data Hub

Japan data tools for AI agents: calendar (rokuyo), address, name splitting, corporate number lookup

ProductivityData access / search

Outdated check52 ms13 / 22
Brahim Bousnguar — portfolio

Brahim Bousnguar's portfolio: profile, availability, case studies, notes, CV requests.

ProductivityFile & docs

Responded54 ms13 / 22
Samedoc: Translate PDF & PDF to Word

Translate PDFs and scans into another language in the same layout, every number kept. PDF to Word.

OtherFile & docs

Responded54 ms13 / 22
com.fluentedi/tools

49 free agent tools: WHOIS, PDF to text, email checks, FX rates, X12 EDI, JSON repair. No API key.

ProductivityCommunication & messaging

Outdated check56 ms13 / 22
AgentKit x402 MCP server

Remote MCP tools for pay-per-call email, domain, SEO and Swedish data utilities (x402).

ProductivityCommunication & messaging

Outdated check57 ms13 / 22
ProofHub MCP by usefulapi

Read projects, tasks, comments, people and time entries; create tasks and comments in ProofHub.

Developer ToolsCode & DevOps

Responded59 ms13 / 22
Sitewalk

Technical SEO audits from ChatGPT or the web: health score, prioritised fixes, CSV and PDF reports.

Marketing & SalesFile & docs

Responded60 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
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
Wasilah

Prayer times, Qibla, Hijri calendar, 99 Names, Quran audio, Bangladesh offsets. English + Bengali.

MediaCode & DevOps

Outdated check63 ms13 / 22
MaidCentral MCP by usefulapi

Read services, prices and open dates; create leads, quotes, bookings and notes in MaidCentral.

Marketing & SalesData access / search

Responded64 ms13 / 22
LNX QR codes

Styled, print-ready QR codes for links, text, email or phone, with frames and custom colors.

ProductivityCommunication & messaging

Outdated check64 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
GoTable MCP by usefulapi

Read availability, reservations, guests; create, change, cancel bookings; add notes in GoTable.

ProductivityFile & docs

Responded66 ms13 / 22
beep.me

Find when public events happen and get email reminders before them, following moved matches.

ProductivityCommunication & messaging

Outdated check66 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

Outdated check66 ms13 / 22
CVEmber

Tailor your resume to any job, get an ATS score and download the PDF from ChatGPT or Claude.

ProductivityAI / LLM tooling

Responded67 ms13 / 22
Noticiel

Notices et modes d'emploi de noticiel.com. Recherche par mots-clés, marque, catégorie ou PDF.

Developer ToolsCode & DevOps

Responded70 ms13 / 22
Recapwren Client Reports

Weekly client reports: change, % change, targets, status, printable page and email text. Free.

ProductivityCommunication & messaging

Outdated check70 ms13 / 22
ZeroStart Paid Service Tools

Bounded data, document, web-quality, and operations services purchased with USDC through x402.

Finance & CryptoPayments & trading

Outdated check70 ms13 / 22
io.github.ryuamarines/email-validator

Validates email syntax and MX records. x402 payment required (Base mainnet USDC).

Finance & CryptoPayments & trading

Outdated check72 ms13 / 22

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