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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1549 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
Billomat MCP by usefulapi

Read Billomat clients, invoices, offers, credit notes, reminders; create clients and draft invoices.

ProductivityPayments & trading

Outdated check348 ms14 / 22
Headcount Labs

Job postings search: find, count and read open jobs from employer career sites, with pay and links.

ProductivityData access / search

Outdated check361 ms14 / 22
Folk MCP by usefulapi

Read and write Folk CRM people, companies, groups and notes.

ProductivityFile & docs

Outdated check371 ms14 / 22
Acuity Scheduling MCP by usefulapi

Read appointments, types, calendars and availability; create, cancel or reschedule bookings.

ProductivityFile & docs

Outdated check409 ms14 / 22
CosVoice

A real phone number and email for your AI Chief of Staff. Calls, bookings by phone, summaries.

ProductivityCommunication & messaging

Outdated check430 ms14 / 22
Surfing Dog Inbox

Message, ask for a quote or book a call with Surfing Dog, through its open-source inbox.

ProductivityCommunication & messaging

Outdated check446 ms14 / 22
com.frankponcelet/profile

Read-only MCP server for Frank Poncelet: profile, career, projects, speaking, expertise, persona.

ProductivityFile & docs

Outdated check466 ms14 / 22
Abstract API MCP by usefulapi

Validate emails, phones, IBAN, VAT; look up IPs and companies; rates, holidays, time via Abstract.

ProductivityData access / search

Outdated check480 ms14 / 22
com.withresumeai/ats

Which ATS does a company use? Portal-verified answers for 743 employers + resume ATS check. No key.

ProductivityFile & docs

Outdated check537 ms14 / 22
AgentDiet A2A Indirect Prompt-Injection & Jailbreak Firewall

Scans untrusted web pages, emails, MCP responses, or A2A payloads for hidden prompt injections an.

ProductivityCommunication & messaging

Outdated check562 ms14 / 22
Moon Calendar

Moon phases, full and new Moon dates, UK moonrise, eclipses, dark skies, tides and Moon sign.

ProductivityFile & docs

Outdated check571 ms14 / 22
AgentDiet B2A Email Deliverability, MX, SPF & DMARC Verifier

Validates email syntax, disposable/burner provider status, role accounts, and live DNS MX/SPF/DMA.

ProductivityCommunication & messaging

Outdated check588 ms14 / 22
smry Product

Read public sources and manage a smry library, feeds, notes, highlights, files, and page monitors.

ProductivityFile & docs

Outdated check604 ms14 / 22
AnyHook

A webhook inbox for agents: one call returns a live URL. Mock, verify, inspect and replay.

ProductivityCommunication & messaging

Outdated check609 ms14 / 22
AgentDiet B2B Company, Tech Stack & Contact Lead Enrichment

Extracts verified emails, social links, 40+ tech stack signals, pricing tiers, and company summar.

ProductivityCommunication & messaging

Outdated check611 ms14 / 22
SMS and WhatsApp Messaging

Send WhatsApp, SMS, email or voice to a business with the compliance gate enforced.

ProductivityCommunication & messaging

Outdated check618 ms14 / 22
MarkIt

Search, save, and set reminders in your personal MarkIt library of links, posts, and notes.

ProductivityCode & DevOps

Outdated check647 ms14 / 22
Bo Kendell — Portfolio

Bo Kendell's portfolio: projects, writing, work history, resume, and live activity.

ProductivityFile & docs

Outdated check808 ms14 / 22
Talent Ops — Resume Screen — Kestrel Logistics (fcdc3b8f)

Free to compete: testnet faucet funds everything. 12 synthetic resume exception cases: duplicate…

ProductivityFile & docs

Responded813 ms14 / 22
RxRooster

Paste anesthesia requisitions and prepare privacy-safe RxRooster drafts. For anesthesia hiring.

ProductivityFile & docs

Outdated check852 ms14 / 22
com.commsharbor/commsharbor

Managed domain email without running a mail stack. Free DNS checks; monthly mailbox packages.

ProductivityCommunication & messaging

Outdated check905 ms14 / 22
Accounts Payable — Resume Audit — Verdant Springs Services Group (66514bc8)

Free to compete: testnet faucet funds everything. 12 synthetic resume exception cases: duplicate…

ProductivityFile & docs

Responded1030 ms14 / 22
Talent Ops — Resume Review — Kestrel Logistics (7185eb28)

Free to compete: testnet faucet funds everything. 12 synthetic resume exception cases: duplicate…

ProductivityFile & docs

Responded1045 ms14 / 22
drwho.me network and developer tools

29 free tools: DNS, email auth (SPF, DKIM, DMARC), TLS, headers, WHOIS, dev utils.

ProductivityCommunication & messaging

Outdated check1407 ms14 / 22

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