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.

Connect your agent

1588 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
Darwin-owned Public Sources

Free bounded public HTTPS document and JSON reads. Exact host allowlist; real source provenance.

Developer ToolsFile & docs

Outdated check390 ms11 / 22
Persistent text store

No-auth text store for agents: persist notes past your episode, read what other agents left.

ProductivityFile & docs

Outdated check412 ms11 / 22
co.sickslip.www/verify

Verify a SickSlip doctor's note by Document ID; states served, pricing, physician NPI. Read-only.

HealthcareFile & docs

Outdated check413 ms11 / 22
goog.workspace-developer/developer-tools

Provides tools for searching Google Workspace documentation and much more.

OtherFile & docs

Responded434 ms11 / 22
AgentTwin Documentation

Search AgentTwin agent testing guides, Node CLI commands and supported synthetic service contracts.

Developer ToolsFile & docs

Outdated check454 ms11 / 22
app.hyperwave.www/docs

Search and read Hyperwave's published wavetable documentation.

OtherFile & docs

Outdated check459 ms11 / 22
co.tasklinkr/skills

Executable skill packages for agents: vetted competence, ready to run, not just documents.

Developer ToolsFile & docs

Responded461 ms11 / 22
Decant: convert CSV, XLSX and PDF to JSON; web page extraction that honours robots.txt

Hosted MCP: CSV/XLSX to JSON rows and text-PDF pages; private uploads or URLs, no API key.

Developer ToolsFile & docs

Outdated check492 ms11 / 22
Balcones Apiary Co.: Managed hive placement and agricultural valuation support

Request managed hive placement, ongoing care and Texas agricultural valuation documentation

OtherFile & docs

Outdated check493 ms11 / 22
Prince Cloud

Convert Markdown, HTML, and web pages to high-quality PDF with Prince.

OtherFile & docs

Responded524 ms11 / 22
16暗影心理测评

Chinese psychological assessments with guided questions, scoring, PDF reports, and user profiles.

OtherFile & docs

Outdated check527 ms11 / 22
Vela Breakout

What's growing in tech, measured daily: AI apps, models, dev tools, software spend, hiring.

ProductivityFile & docs

Outdated check531 ms11 / 22
Learnosity Build Aide

Build Learnosity integrations from Learnosity's own documentation and integration skills.

Developer ToolsFile & docs

Outdated check559 ms11 / 22
RocketVault Public Knowledge and Marketplace

Search public RocketVault card listings and read product documentation.

Developer ToolsFile & docs

Outdated check561 ms11 / 22
MTD Chase — chase clients for MTD records

UK bookkeepers: chase clients for Making Tax Digital quarterly records, upload links, reminders.

ProductivityFile & docs

Outdated check563 ms11 / 22
mdprint documentation

Read-only mdprint product information, documentation and Markdown examples. No document uploads.

Developer ToolsFile & docs

Outdated check633 ms11 / 22
RegusciLabs Documentation

Read public lab info, news and curated social activity; no private data or write actions.

MediaFile & docs

Outdated check695 ms11 / 22
Handiworks

MCP tools for AI agents: render URLs to image/PDF, check link health, convert HTML/CSV/JSON.

MediaFile & docs

Outdated check707 ms11 / 22
io.github.steviepinero/docforge

12 paid document tools: PDF to markdown, OCR, tables, invoices, Word/Excel/HTML, merge/split. x402

Finance & CryptoFile & docs

Responded738 ms11 / 22
Bluetab

Read and organize your Bluetab saved tab groups, projects, Brain Dump notes and reminders.

ProductivityFile & docs

Outdated check770 ms11 / 22
WIA Wisdom

Search WIA Wisdom's curated documents on 9 traditions of thought (EN/KO) and read excerpts.

OtherFile & docs

Outdated check776 ms11 / 22
The Agent Bar

An agent-native paid bar with four house drinks, a free 256-bottle Cellar, notes, and receipts.

ProductivityFile & docs

Responded819 ms11 / 22
com.mailmergepdf/site

Mail Merge PDF: the site's own MCP server — checker, enquiry (enquiry = a human handoff, not a...

Developer ToolsFile & docs

Outdated check913 ms11 / 22
ai.filegraph/document-processing

Extract text from documents, manipulate PDFs, and perform OCR on images.

MediaFile & docs

Responded977 ms11 / 22

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