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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2888 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
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Outdated check64 ms13 / 22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Outdated check66 ms13 / 22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Outdated check66 ms13 / 22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Outdated check70 ms13 / 22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Outdated check70 ms13 / 22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Outdated check72 ms13 / 22
Clawhard Dev Tools

Exact developer checks: email DNS, Supabase RLS, cron, JSON, contrast, time zones, npm/PyPI packages

Developer ToolsDatabase

Responded73 ms13 / 22
Agent Preflight: OFAC, DNS, Email Auth, Domain, Email & URL

$0.01/call via x402: OFAC wallet screen, DNS, email auth, domain age, email verify, URL unshorten.

Finance & CryptoPayments & trading

Outdated check73 ms13 / 22
A2A Board

Public message board for AI agents, plus private notes with pickup codes and an echo tool.

ProductivityCommunication & messaging

Responded76 ms13 / 22
Workday Calendar

Public holidays and business-day math (T+N, counts) for many countries; pay per call via x402

ProductivityPayments & trading

Outdated check77 ms13 / 22
Adam Hale Tools: Web Research and Open Data

Free web lookups; PDF to Markdown, audio transcripts, screenshots, WHOIS/DNS paid per call via x402.

MediaFile & docs

Outdated check86 ms13 / 22
klaro.legal Document Explainer

Explains contracts, letters and tax notices clause by clause. Text, PDF or photos. Not legal advice.

LegalFile & docs

Outdated check87 ms13 / 22
TraceTail

Browser fingerprinting for web apps: integration code for any framework, docs search and pricing.

OtherData access / search

Outdated check87 ms13 / 22
agent-manager.dev documentation

Docs for agent-manager, the terminal UI that runs AI coding agents as live tmux sessions.

Developer ToolsFile & docs

Outdated check89 ms13 / 22
Faceabot Translate

Translate text or a document into about 100 languages. Free, no key.

OtherFile & docs

Outdated check89 ms13 / 22
hovhannes.io

Yerevan Product Coffee: table dates, remaining seats, seat requests, and the field notes behind it.

ProductivityFile & docs

Outdated check91 ms13 / 22
Handsontable Docs MCP Server

Semantic search over Handsontable and HyperFormula docs, API reference, release notes, and issues.

ProductivityData access / search

Responded92 ms13 / 22
Digital Garden by Alicia — Notes

Search and read Alicia's English and Chinese notes on Houdini, Three.js, OpenUSD and AI workflows.

ProductivityAutomation & workflows

Outdated check92 ms13 / 22
Consistency Calendar

Turn any goal with a deadline into a private, gamified, evidence-based execution calendar.

Developer ToolsCode & DevOps

Outdated check95 ms13 / 22
Wagner Data: supplier catalogs to Shopify

Free Shopify product CSV checker + done-for-you supplier price list (PDF/Excel) to Shopify CSV.

E-commerceFile & docs

Outdated check97 ms13 / 22
Frameverb

Read-only discovery of Frameverb creative tasks and provider routes.

OtherOther

Responded103 ms13 / 22

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