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
PM Career Desk

Resume, LinkedIn and interview practice tools for project, program and product managers.

ProductivityFile & docs

Outdated check932 ms13 / 22
com.thejohnsonbros/plumbing-booking

Johnson Bros. Plumbing: check coverage, services, pricing, availability, and book by SMS.

ProductivityCommunication & messaging

Outdated check993 ms13 / 22
I'm In! Sign-up Sheets

Turn an email, notes or a flyer into a free sign-up sheet with reminders and waitlists.

ProductivityCommunication & messaging

Outdated check1005 ms13 / 22
RealMarket Site Check

Passive checks of a public website: email authentication (SPF, DKIM, DMARC) and basic security.

ProductivityCommunication & messaging

Outdated check1090 ms13 / 22
Dominick Prevete: Instant Fix-and-Flip Term Sheet

Written fix-and-flip term sheets for 1–4 unit investment purchases, by email. Business-purpose only.

ProductivityCommunication & messaging

Outdated check1129 ms13 / 22
Applystead

Search open jobs from employers' own career sites: roles, companies and posting status.

ProductivityData access / search

Outdated check1136 ms13 / 22
net.fundz/fundz

SEC-sourced funding rounds, acquisitions, exec moves, hiring and investor signals. 7 keyless tools.

ProductivityFile & docs

Outdated check1152 ms13 / 22
Instead

Hire staff for UK cafés, pubs and shops: post a free job, print hiring posters, find London jobs.

ProductivityFile & docs

Outdated check1246 ms13 / 22
GEOMETRY

Deterministic calendars and cosmic date JSON for AI agents via MCP (Gregorian 1900-2100).

ProductivityFile & docs

Outdated check1310 ms13 / 22
Karthik Parameshwara

Read-only profile, resume, projects and open-source work of software engineer Karthik Parameshwara.

ProductivityFile & docs

Outdated check1390 ms13 / 22
ベストカレンダー 暦データ

Japanese calendar data (rokuyo, lucky days, solar terms, holidays, moon, sunrise), 1926-2080.

ProductivityFile & docs

Outdated check1500 ms13 / 22
TechJobs.vn

Search open tech jobs and companies hiring in Vietnam, refreshed hourly. No key needed to search.

ProductivityData access / search

Outdated check1547 ms13 / 22
MSG91

Find and call the right MSG91 API for SMS, OTP, WhatsApp, Email and Voice.

ProductivityCommunication & messaging

Outdated check2814 ms13 / 22
Desky

Find and book coworking spaces, meeting rooms and offices in Latin America from your AI assistant.

ProductivityFile & docs

Outdated check2997 ms13 / 22
Outdated check129 ms13 / 22
SendaFax

Send a fax in Australia (+61). Pay only if it delivers. Email receipt. No card at send.

ProductivityCommunication & messaging

Responded590 ms13 / 22
TextKit

SMS for developers: send and receive texts, verify phones, and buy US and Canada numbers.

ProductivityCommunication & messaging

Outdated check689 ms13 / 22
Brahim Bousnguar — portfolio

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

ProductivityFile & docs

Outdated check48 ms12 / 22
Email & SMS Marketing Cost Calculator

Compare monthly email and SMS marketing costs across 11 platforms, with dated official sources.

ProductivityCommunication & messaging

Outdated check51 ms12 / 22
APAC Reg Notes

Bilingual EN/zh summaries of APAC financial and AI regulatory notices (HKMA, SFC, FSC, JFSA); x402

ProductivityPayments & trading

Outdated check52 ms12 / 22
Rolston Paul field notes

Read-only search and reading of the field notes on rolstonpaul.com, quoted word for word with URLs.

ProductivityData access / search

Outdated check55 ms12 / 22
Meridian

Convert times between zones with daylight saving right, see who is awake, find meeting slots.

ProductivityFile & docs

Outdated check57 ms12 / 22
Overlap — find a time a group is free (when2meet/Doodle alternative)

Free no-login group availability poll; reads back the best meeting time for a group.

ProductivityFile & docs

Outdated check62 ms12 / 22
Custody Calendar Maker

Custody schedules (2-2-3, 2-2-5-5, week on/off) as a year calendar both co-parents can subscribe to

ProductivityFile & docs

Outdated check62 ms12 / 22

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