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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1424 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
LLC Owner Lookup & Skip Trace — Registered Agent & Wireless

Pierce anonymous LLCs via SOS & GLEIF registries to find human owners, wireless phones & emails.

Developer ToolsCommunication & messaging

Outdated check472 ms11 / 22
Bulk B2B Email Verifier — DNS MX, Disposable & Catch-All Check

Bulk verify B2B emails via Cloudflare DNS MX, SPF/DMARC, disposable check & 0-99 catch-all score.

Developer ToolsCommunication & messaging

Outdated check519 ms11 / 22
Skip Trace & Property / LLC Owner Phone Finder — Emails & KYB

Pierce anonymous LLCs via SOS/GLEIF and resolve verified owner wireless phones, emails & OFAC KYB.

Developer ToolsCommunication & messaging

Outdated check531 ms11 / 22
WebZum - Websites for Small & Local Businesses

Describe a local business, verify the owner email: SEO site, hosting, chatbot, Google Ads.

Marketing & SalesCommunication & messaging

Outdated check1407 ms11 / 22
io.github.freshfos/dropcoin-validation

EU compliance checks for AI agents: sanctions, company, VAT ID, IBAN, email. Pay per call.

Developer ToolsCommunication & messaging

Responded45 ms10 / 22
Email Check

Fast email validation at the edge: syntax, MX records, disposable-domain detection.

Developer ToolsCommunication & messaging

Responded62 ms10 / 22
cc.aiones/x-news-monitor

X 资讯监控:盯账号自动巡检,新帖去重中文日报,每 30 分钟自动巡查,支持飞书/Slack/Discord 推送

ProductivityCommunication & messaging

Responded64 ms10 / 22
Spaghetti and Summits — First-Hand Dolomites Adventures

Dolomites climbing, ski, and rifugio guides; limited anonymous inbox for plain-text owner messages.

ProductivityCommunication & messaging

Responded70 ms10 / 22
Dmarc Spf Audit

Complete domain email-auth audit in one call: SPF with RFC 7208 lookup counting, DKIM selector pr...

Developer ToolsCommunication & messaging

Responded113 ms10 / 22
Incwo MCP

Secure MCP server for exploring incwo CRM data, documents, and email workflows.

Developer ToolsCommunication & messaging

Responded150 ms10 / 22
com.textforagents/agent-incident-classification-notification

Signed agent-incident classification vs PP-26-4396, with third-party notification receipts.

Developer ToolsCommunication & messaging

Responded338 ms10 / 22
Gluo

Free agent tools, no sign-in: browser flows, test inboxes, web extract, site and security scans.

ProductivityCommunication & messaging

Responded360 ms10 / 22
Mekler AI

Research, inference, data/web/email tools, and x402 conformance, service catalog and grade feeds.

ProductivityCommunication & messaging

Responded513 ms10 / 22
ZenVault

Wake-ups, webhook inboxes, TTL memory, watches and human approval for agents. Paid per call.

ProductivityCommunication & messaging

Outdated check208 ms10 / 22
Double Check

AI-powered scam detection for suspicious texts, emails, and screenshots. US-focused.

Developer ToolsCommunication & messaging

Responded385 ms10 / 22
Hookjar

Public webhook inboxes for agents. Receive OAuth redirects, payment callbacks and CI notifications.

Finance & CryptoCommunication & messaging

Outdated check406 ms10 / 22
Agent Papers

Registry of companies selling AI agents identity, phone, email, addresses, money, legal, insurance

LegalCommunication & messaging

Responded466 ms10 / 22
io.github.mifactory-bot/mifactory-email

Send transactional emails for AI agents via SMTP. Templates included.

Developer ToolsCommunication & messaging

Responded543 ms10 / 22
Surf Session Finder

Surf park sessions schedule availability and notifications for wave park surfers worldwide

Developer ToolsCommunication & messaging

Responded61 ms9 / 22
MyRouteOnline

Multi-stop route optimization, navigation links, and email delivery. Powered by MyRouteOnline.

Developer ToolsCommunication & messaging

Responded715 ms9 / 22
Moltline Personal Suite

20 inbox, calendar, travel, meals and family-logistics skill products. 7 of 9 free.

ProductivityCommunication & messaging

Unreachable494 ms9 / 22
com.promtpress/ads

Buy Telegram subscribers and website traffic, billed per verified result.

Marketing & SalesCommunication & messaging

Requires authOutdated checkNot measured6 / 22
asms

Phone numbers for AI agents: SMS verification codes and rented numbers that receive SMS.

ProductivityCommunication & messaging

Requires authNot measured6 / 22Not checked yet
Atmark

Email for AI agents: its own address, not your Gmail. Invite-only; requires an agent token.

ProductivityCommunication & messaging

Requires authNot measured6 / 22Not checked yet

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