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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1407 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
REP27 — EU & UK legal representative

Check EU/UK GDPR Art. 27 and GPSR Art. 16 obligations, see plans, start a free trial

LegalKnowledge & memory

Outdated check150 ms13 / 22
otwarteAPI.pl

Official public & government APIs, dozens of countries: registers, statistics, open data. Keyless.

Data & AnalyticsCode & DevOps

Outdated check153 ms13 / 22
OnionLens Tor Tools

Tor address validation and retrieval fixtures, with disclosed research logging.

OtherOther

Responded161 ms13 / 22
Rasczak Knowledge Commons

Free decision methods, work-kit previews and optional feedback. Hosted research is not available.

Developer ToolsCode & DevOps

Outdated check172 ms13 / 22
Unfrozen Atlas of the Middle

Graded research on middle managers and change: search studies, get fact-checked answers.

OtherData access / search

Outdated check182 ms13 / 22
Bonebenders

Dentistry knowledge base: implantology, periodontology, oral surgery. Verbatim text, with sources.

OtherKnowledge & memory

Outdated check195 ms13 / 22
Context Relay

Compact, citation-verifiable public web context for AI agents, paid per use with x402.

Developer ToolsCode & DevOps

Outdated check205 ms13 / 22
PaperBanana Research Figure Prompts

Search and read public research figure prompt templates from PaperBanana.

Developer ToolsCode & DevOps

Outdated check206 ms13 / 22
California Bitcoin

Bitcoin research for AI agents: free answers, specialist Q&A, verification, evidence, timelines.

Finance & CryptoPayments & trading

Outdated check207 ms13 / 22
TextClean MCP

Free deterministic PDF, Markdown, citation, invisible-character, and formatting cleanup for agents.

Developer ToolsFile & docs

Outdated check212 ms13 / 22
Prostitution Laws

Prostitution and sex-work law in 196 countries: legal models, penalties, statutes, reforms, sources

LegalKnowledge & memory

Outdated check213 ms13 / 22
Overfit — German tenders & procurement law

German public tenders (190k+) and procurement-law calculators with legal basis. Free, no sign-up.

LegalKnowledge & memory

Outdated check221 ms13 / 22
Human for AI

Ask a human for legal review, confirmation, a signature, or a physical-world act

LegalKnowledge & memory

Outdated check221 ms13 / 22
com.thecastlemap/castles

Castles, fortresses, palaces and ruins worldwide: search, nearby, fame ranking, statistics. CC0.

Data & AnalyticsData access / search

Responded231 ms13 / 22
Section13Online

Section 13 notice dates and eligibility for England. Read-only guidance, not legal advice.

LegalKnowledge & memory

Outdated check231 ms13 / 22
be.co-legal/legal-lookup

Belgian/Dutch legal and fiscal lookups plus Belgian notary preparation. 13 tools.

LegalData access / search

Outdated check232 ms13 / 22
Husverket – Swedish Prefab Houses

Husverket AB knowledge base: 350 Q&A on attefallshus, prices and building permits in Sweden.

OtherKnowledge & memory

Outdated check232 ms13 / 22
Attention Trends

Topic popularity, interest over time and trending topics from Wikipedia pageviews (x402 paid).

Finance & CryptoKnowledge & memory

Outdated check238 ms13 / 22
Nutcracker

Creative work for brand teams: strategy, copy, ideas, research, decks, key visuals and video ads.

MediaAI / LLM tooling

Outdated check245 ms13 / 22
Altair

Free TradingAgents equity research reports and Altair pages; paid signals feed via x402 inside MCP.

Finance & CryptoPayments & trading

Outdated check252 ms13 / 22
Forms Legal templates

Search free legal document templates for 36 jurisdictions and cite Forms Legal pages.

LegalFile & docs

Outdated check260 ms13 / 22
io.github.UnityNodes/blobpedia

Celestia knowledge base: CIPs, docs, forum, videos, GitHub, plus live on-chain state

Finance & CryptoKnowledge & memory

Outdated check264 ms13 / 22
nu:legal Deutsches Recht

German federal and Land statutes plus court decisions for agents. Keyless, read-only.

LegalKnowledge & memory

Outdated check265 ms13 / 22
finance.marx/marx-finance

Autonomous AI agents research market events and publish aggregated forecasts.

Developer ToolsCode & DevOps

Outdated check268 ms13 / 22

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