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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5071 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
SYMONE documentation

Search and read SYMONE documentation: service, prices, public API, MCP servers, sandbox, limits.

OtherFile & docs

Responded123 ms13 / 22
Hackernews

Hacker News MCP — search and retrieve stories from Hacker News

Developer ToolsCode & DevOps

Outdated check131 ms13 / 22
Agent Crawl Readiness

Bounded crawl-readiness check for agent access: robots.txt, sitemap.xml, llms.txt, homepage.

Developer ToolsBrowser & web scraping

Outdated check139 ms13 / 22
NobodyNamed

US baby name popularity data from SSA records (1880-2025): search, trends, geography, culture.

Developer ToolsCode & DevOps

Responded152 ms13 / 22
PartsTable

Calibrated IT hardware parts reference: PN normalization, search, cross-references, cited facts.

OtherData access / search

Responded162 ms13 / 22
ForthClear Liquidation Marketplace

Search surplus and overstock inventory, request bulk quotes, and check out.

OtherData access / search

Responded170 ms13 / 22
com.giveradar/charity-registry

Search, verify and compare 7.9M+ nonprofits from official charity registries in 100+ countries.

OtherData access / search

Responded178 ms13 / 22
llms-text

Generate, validate, and deep-crawl /llms.txt and /llms-full.txt files for AI agents.

Developer ToolsBrowser & web scraping

Responded209 ms13 / 22
HSH Data-on-Demand

Made-to-order data for AI agents: company intel, B2B contacts, scraping. Pay per call via x402.

Developer ToolsCode & DevOps

Responded227 ms13 / 22
com.arcasos/arcasos-rentals

Korean premium short-term rental search: natural language or structured filters (SHV engine).

OtherData access / search

Responded302 ms13 / 22
directree

Search 5000+ software tools with structured, labelled facts. No pay-to-rank.

Developer ToolsCode & DevOps

Responded306 ms13 / 22
Itunes Search

iTunes Search MCP — Apple's public catalog search

Developer ToolsCode & DevOps

Responded415 ms13 / 22
arXiv & OpenAlex Academic Search MCP

Peer-reviewed scientific paper & arXiv preprint search MCP with citations, abstracts & PDF links.

Developer ToolsKnowledge & memory

Responded434 ms13 / 22
CompShop

Search 350+ compensation surveys by industry, region, or job title. Independent directory.

Developer ToolsCode & DevOps

Responded465 ms13 / 22
CFPB Consumer Financial Complaints & Bank Audit

Search US CFPB consumer complaint records across banks, lenders, and fintech institutions.

Finance & CryptoData access / search

Responded519 ms13 / 22
Jina Reader

Jina AI Reader/Search MCP — turn any URL into clean LLM-ready markdown, plus web search.

Developer ToolsData access / search

Responded521 ms13 / 22
OpenAlex Scientific Citation Graph & Research Search

Search 250M+ academic works, citation graphs, DOIs, and institutional research via OpenAlex.

OtherKnowledge & memory

Responded530 ms13 / 22
Arcgis Hub

ArcGIS Hub — open government geospatial data (search + Feature Service query).

GovernmentCode & DevOps

Responded539 ms13 / 22
GLEIF Global LEI & Corporate Entity KYB Lookup

Search Global Legal Entity Identifier (GLEIF LEI) records for corporate KYB and entity verification.

LegalData access / search

Responded543 ms13 / 22
Tresslers Intelligence MCP Server

Sovereign intelligence dossiers, daily briefings, RAG search, knowledge graph, codon optimizer.

Developer ToolsCode & DevOps

Responded557 ms13 / 22
CMS NPPES NPI-2 Healthcare Organization Registry

Search official CMS NPPES NPI-2 medical organization and healthcare provider registry records.

HealthcareData access / search

Responded559 ms13 / 22
Google Cloud 17,671 API, SKU & MCP Schema Catalog

Sub-millisecond FTS5 search across 17,671 Google Cloud APIs, SDKs, Billing SKUs, and MCPs.

Finance & CryptoPayments & trading

Responded562 ms13 / 22
com.tomesphere/tomesphere

Search 8.5M scientific papers with LLM TLDRs, citations, linked entities, figures, and full text.

Developer ToolsKnowledge & memory

Responded591 ms13 / 22
TCC Group website

Read-only tools for tcc.group: contact card, documents, page search and page content.

OtherFile & docs

Responded645 ms13 / 22

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