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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1555 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
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Outdated check689 ms13 / 22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Outdated check48 ms12 / 22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Outdated check51 ms12 / 22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Outdated check52 ms12 / 22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Outdated check55 ms12 / 22
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Outdated check62 ms12 / 22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Outdated check62 ms12 / 22
The Wire

A public meeting place for agents to exchange reviews and coordinate work.

ProductivityFile & docs

Outdated check66 ms12 / 22
CVEmber

Tailor your resume to any job, get an ATS score and download the PDF from ChatGPT or Claude.

ProductivityAI / LLM tooling

Outdated check70 ms12 / 22
x402 Format Checker

IBAN, EU VAT, NIP, REGON, PESEL, email checks. Only $0.001 (0.1 cent) per check via x402 on Base

ProductivityCommunication & messaging

Outdated check70 ms12 / 22
mailverdict

Keyless email checks: disposable, role, and free-provider detection, MX, and typo suggestions.

ProductivityCommunication & messaging

Outdated check74 ms12 / 22
MeetingPoll — Fast Group Scheduling & Availability Polls

Create and query group meeting availability polls, time-zone slots, and scheduling links.

ProductivityFile & docs

Outdated check77 ms12 / 22
Autojob

Automate your job search: find jobs, upload a resume, apply automatically, and track applications.

ProductivityData access / search

Outdated check80 ms12 / 22
Zovo JSON to Spreadsheet

Turn a JSON file or pasted JSON into an Excel workbook and a CSV, right in the chat.

ProductivityFile & docs

Outdated check81 ms12 / 22
Handsontable Docs MCP Server

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

ProductivityData access / search

Outdated check81 ms12 / 22
ItsNineThere

World clock, time conversions, DST dates and meeting times. Free, no login.

ProductivityFile & docs

Outdated check83 ms12 / 22
Zovo Spreadsheet Checker

Check a spreadsheet for errors before you import it, send it or report from it.

ProductivityFile & docs

Outdated check85 ms12 / 22
Rosis Morgenhimmel — Tageshoroskop und Himmelskalender

Daily horoscopes (de/en/es, 7 days ahead), moon phases, Panchang, solar terms, Maya calendar.

ProductivityFile & docs

Outdated check85 ms12 / 22
sharescan: check before you share

Pre-share check: flags API keys, emails, your private terms in text. As is. x402 $0.005, Base

ProductivityCommunication & messaging

Outdated check86 ms12 / 22
Outdated check87 ms12 / 22
Zovo Spreadsheet Merge

Merge two spreadsheets on an ID column, the VLOOKUP job, and see how each row matched.

ProductivityFile & docs

Outdated check90 ms12 / 22
Sky and Signs — horoscopes and sky calendars

Daily horoscopes (en/es/pt, 7 days ahead), moon phases, Panchang, solar terms, Maya, Ramadan dates.

ProductivityFile & docs

Outdated check94 ms12 / 22
The List Access

Search the public Dutch event calendar by artist, city, venue, genre and date. Read-only.

ProductivityData access / search

Outdated check95 ms12 / 22

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