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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1417 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
io.github.robertoyanguas-ops/arxiv-digest-mcp

Queries ArXiv for AI/CS/math papers and returns structured abstracts, authors, PDF links, and BibT

Developer ToolsCode & DevOps

Outdated check421 ms12 / 22
Citation Check

Does a cited URL exist, and does the source name what your claim names? Two answers.

Developer ToolsCode & DevOps

Outdated check430 ms12 / 22
io.github.MelanieABC/misim-tax-research

Israeli tax research tools, cited to official sources: VAT, income tax, deadlines, forms.

Developer ToolsCode & DevOps

Outdated check442 ms12 / 22
Floatout

Launch a branded Hyperliquid perps and prediction market DEX. Read plans, guides and fee research.

OtherOther

Outdated check444 ms12 / 22
Aguasto Research

Search Aguasto's published research descriptions and canonical references.

OtherData access / search

Responded463 ms12 / 22
The Wiley Rule (public data)

Read-only public data on 7-OH and related products: research, test results, FDA actions, state laws

OtherOther

Outdated check467 ms12 / 22
WellState Labs SB 1150 Screening (read-only)

Signed Texas SB 1150 screens. Cost proxies, not ARO, not legal determinations, not bond amounts.

LegalKnowledge & memory

Outdated check481 ms12 / 22
Casimo Research — casino terms & changes

Source-backed US casino conditions, actual observed changes and explicit data limitations.

Developer ToolsCode & DevOps

Outdated check490 ms12 / 22
Stock Trends Market Intelligence

Equity trend, relative-strength, expected-return, market-context, and research resources for agents.

Finance & CryptoPayments & trading

Outdated check500 ms12 / 22
StackData

Official statistics, China censuses & yearbooks, and as-of customs tariffs with legal citations.

GovernmentKnowledge & memory

Outdated check507 ms12 / 22
Quiz20

Previous year papers, topic quizzes and NCERT chapters for Indian competitive exams.

Developer ToolsCode & DevOps

Outdated check514 ms12 / 22
ExMachina AI — agent research rooms

AI agents collaborate on open biomedical problems, citing sources that are machine-checked.

Developer ToolsCode & DevOps

Outdated check530 ms12 / 22
Working Proxy Sites

Research proxy providers, compare published prices, and discover provider MCP integrations.

OtherOther

Outdated check561 ms12 / 22
The Parse

Search a tiered, cited public research record; read its sources; work its open questions.

OtherData access / search

Outdated check583 ms12 / 22
Agent Clubhouse — Discover Voluntary Shared Work

Find voluntary shared agent work: signed artifacts, research and questions. Read-only introduction.

Developer ToolsCode & DevOps

Outdated check603 ms12 / 22
org.wikiprompt/mcp

The Wikipedia of AI prompts: search 900+ curated prompts by model, style and type, in 7 languages

Developer ToolsKnowledge & memory

Responded621 ms12 / 22
com.ntop/docs

Search and query nTop's knowledge base and engineering guides from AI applications.

OtherKnowledge & memory

Outdated check624 ms12 / 22
com.jojapi/ahrefs

Ahrefs: Ahrefs API: SEO powerhouse featuring keyword research, backlink analysis, and SERP tracking.

Marketing & SalesBrowser & web scraping

Responded626 ms12 / 22
insc.one — INSC.1 Citation Layer

Bench-aware citator for Supreme Court of India precedent: verified INSC cites, extractive ratios.

LegalKnowledge & memory

Outdated check627 ms12 / 22
Straelo Relay

MCP tools for agents: web research, content extraction, email, DNS, and blockchain intelligence.

Finance & CryptoPayments & trading

Outdated check628 ms12 / 22
ESQ Matching Engine

Find and compare licensed US lawyers from official licensing records, with sources. No legal advice.

LegalKnowledge & memory

Responded629 ms12 / 22
ConductScience catalog

Search ConductScience lab equipment and research software, and read product details.

OtherData access / search

Outdated check652 ms12 / 22
Agent Commons

A public commons for agents to search and share reusable findings and open research questions.

Developer ToolsCode & DevOps

Outdated check673 ms12 / 22
DropEngine x402 Agent Services

AI Agent Utility Layer for agent safety, web monitoring, crypto research and tool discovery.

Finance & CryptoMonitoring & observability

Outdated check676 ms12 / 22

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