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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1587 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
Responded995 ms13 / 22
Committee Releases

Committee Releases — documents congressional committees publish on their OWN websites: press…

Developer ToolsFile & docs

Responded92 ms13 / 22
Qt Documentation

Qt 5 and Qt 6 framework and product docs: Qt Creator, MCUs, Squish, Coco and more.

Developer ToolsFile & docs

Responded8 ms12 / 22
dev.workers.perch-app.skim/skim

URL to Markdown or structured JSON (schema.org/OG); renders SPA; batch reads. No signup/key.

Developer ToolsFile & docs

Responded43 ms12 / 22
Doucebeads · Image to Bead Pattern

Convert PNG/JPEG into fuse-bead charts with MARD codes, PNG, CSV and an editable web link.

MediaFile & docs

Outdated check44 ms12 / 22
Brahim Bousnguar — portfolio

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

ProductivityFile & docs

Outdated check48 ms12 / 22
Meridian

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

ProductivityFile & docs

Outdated check57 ms12 / 22
AgentRead

Turn URLs, PDFs and DOCX into clean Markdown for agents, plus prompt-injection scanning

Developer ToolsFile & docs

Responded59 ms12 / 22
Umesh Malik Blog & Profile

Search Umesh Malik's blog, fetch posts as Markdown, list topics, get his profile.

Developer ToolsFile & docs

Responded60 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

Responded62 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

Responded62 ms12 / 22
Readmd

Any web page as clean, LLM-ready Markdown with metadata, outline and token counts. Free preview.

Developer ToolsFile & docs

Responded66 ms12 / 22
The Wire

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

ProductivityFile & docs

Responded66 ms12 / 22
Sitewalk

Technical SEO audits from ChatGPT or the web: health score, prioritised fixes, CSV and PDF reports.

Marketing & SalesFile & docs

Outdated check66 ms12 / 22
Zovo PDF Form Fill

List and fill the fields of a PDF form document from your answers in the chat.

Developer ToolsFile & docs

Responded68 ms12 / 22
SafeResize

Passport and visa photo rules for 110 documents in 60 countries, and upload limits as exact numbers.

MediaFile & docs

Outdated check70 ms12 / 22
CSV File Tools

Inspect, filter, sort and edit CSV text with four free tools. No account or API key required.

OtherFile & docs

Responded71 ms12 / 22
Markdown Lane Check - llms.txt, .md twins, Accept: text/markdown

Six checks: llms.txt, llms-full.txt, .md twins, Accept: text/markdown, sitemap.md, alt link. Free.

OtherFile & docs

Responded71 ms12 / 22
Buba public catalogue and guides

Read-only fictional adult AI companion catalogue and Buba product documentation.

OtherFile & docs

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
Samedoc: Translate PDF & PDF to Word

Translate PDFs and scans into another language in the same layout, every number kept. PDF to Word.

OtherFile & docs

Outdated check79 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

Responded81 ms12 / 22
GoTable MCP by usefulapi

Read availability, reservations, guests; create, change, cancel bookings; add notes in GoTable.

ProductivityFile & docs

Outdated check81 ms12 / 22
ItsNineThere

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

ProductivityFile & docs

Outdated check83 ms12 / 22

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