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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1557 servers

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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
Nestproof: Graded pattern files your LA factory signs off before the cut

Graded pattern-file transfer to LA factories, with factory sign-off checks; terms by email

ProductivityCommunication & messaging

Responded490 ms12 / 22
emailmd

Render markdown into email-safe HTML, lint drafts for deliverability problems, and preview emails.

ProductivityCommunication & messaging

Outdated check494 ms12 / 22
cn.pianam.mcp/calendar-mcp

China holidays and lunar calendar lookup, solar-to-lunar conversion and yearly schedule.

ProductivityData access / search

Outdated check495 ms12 / 22
MindMap

Turn outlines and hierarchical notes into interactive mind maps through a hosted remote MCP server.

ProductivityFile & docs

Outdated check496 ms12 / 22
HeadStart Jobs

Search 466k tech jobs read from company career sites; see who is hiring and what roles ask for.

ProductivityCode & DevOps

Outdated check506 ms12 / 22
Responded510 ms12 / 22
ar.com.sofiaferro/portfolio

Sofia Ferro's portfolio: projects, blog posts, JSON Resume and a contact tool (es/en).

ProductivityFile & docs

Outdated check516 ms12 / 22
VeritaHire Hiring Intelligence

For employers: how a job posting compares with the market nearby, by competitor; hiring reports.

ProductivityFile & docs

Outdated check523 ms12 / 22
Digital Business Portal

Read-only: contractor licences CA/TX/FL/WA, email and phone checks, web reader, CA repair dispatch.

ProductivityCommunication & messaging

Responded528 ms12 / 22
AGORA

Q&A forum where AI agents ask each other for help: search, read, post, reply, inbox.

ProductivityCommunication & messaging

Responded533 ms12 / 22
io.inboxguard/email-deliverability

Scan and fix a domain's email deliverability (SPF, DKIM, DMARC, MTA-STS, BIMI, DNS blocklists).

ProductivityCommunication & messaging

Outdated check534 ms12 / 22
SpamFixer Email Deliverability Check

Why do a domain's emails go to spam? Checks SPF, DKIM, DMARC, MX and blocklists. Free, no login.

ProductivityCommunication & messaging

Outdated check541 ms12 / 22
com.tweetsmash/mcp

Search, label, and manage your X (Twitter) bookmarks from any MCP client via Tweetsmash

ProductivityData access / search

Outdated check565 ms12 / 22
Giornata Mondiale

Italian world days: search, calendar dates, sources, published content and verification status.

ProductivityData access / search

Outdated check573 ms12 / 22
co.vincap/listed-wine-companies

Listed wine-company index, results, calendar and estates; dated, sourced. Not investment advice.

ProductivityFile & docs

Outdated check577 ms12 / 22
Outdated check589 ms12 / 22
Lettera

Messaging and inboxes for AI agents: register, send signed messages, check your inbox, find agents.

ProductivityCommunication & messaging

Outdated check594 ms12 / 22
ResumeMD

Turn a Markdown resume draft into an interview-ready PDF. 32 templates, no account, nothing stored.

ProductivityFile & docs

Outdated check602 ms12 / 22
Imashime

Notes on AI mistakes in Japanese or English: search (read-only), or send your own story privately.

ProductivityData access / search

Outdated check610 ms12 / 22
Flamigo

Turn notes into slides, edit presentations, compare designs, and export HTML or PowerPoint.

ProductivityFile & docs

Responded613 ms12 / 22
SMSPVA Documentation

SMSPVA API docs: search and code examples for SMS activation, number rental and private email.

ProductivityCommunication & messaging

Outdated check614 ms12 / 22
x402 Domain Lookup & DNS Email Auth

Domain lookup (DNS records + RDAP registrar/age/expiry), bulk, and SPF/DKIM/DMARC audit via x402.

ProductivityCommunication & messaging

Outdated check617 ms12 / 22
RoxSkin HYROX

HYROX race calendar, race-weekend city guides, training guides and athletes to sponsor.

ProductivityFile & docs

Outdated check621 ms12 / 22
Nityaflow

Build WhatsApp, Sheets and Gmail automations for Indian businesses; check GST credit.

ProductivityCommunication & messaging

Outdated check622 ms12 / 22

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