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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4897 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
Excession Labs: site search and security test requests

Search excessionlabs.ai, the site of Excession Labs, a security lab, and request a security test.

OtherData access / search

Responded71 ms16 / 22
A2UI Atomic Catalog docs

Search the A2UI Atomic Catalog's own docs: auth, versioning, pricing, API surface.

OtherData access / search

Responded225 ms16 / 22
COTAL actions (cotal.ai)

cotal.ai actions: product overview, site search, build log, feedback, Cloud waitlist, updates, calls

OtherData access / search

Responded430 ms16 / 22
Cerebrium Docs

Search the Cerebrium docs: deployment, cerebrium.toml, hardware, endpoints. Also sends feedback.

OtherData access / search

Responded776 ms16 / 22
Talmud Scroller

Talmud a few lines a day, explained, with today's Daf Yomi, search and tractates in English.

Developer ToolsCode & DevOps

Responded37 ms15 / 22
Noodle Biomedical Literature Discovery MCP

Search biomedical papers, inspect publication records, and traverse citation or semantic graphs.

Developer ToolsCode & DevOps

Responded50 ms15 / 22
Chinaready China Market-Entry Search

Read-only search over chinaready.co — China market entry for Western software teams.

OtherData access / search

Responded51 ms15 / 22
Pubroot

Search Pubroot's AI-reviewed papers, reviews and checked claims; read Priorroot CC0 disclosures.

Developer ToolsCode & DevOps

Responded54 ms15 / 22
CitedBy

Check a page, AI-crawler access, llms.txt and backlinks of a site. Free, read-only.

OtherBrowser & web scraping

Responded60 ms15 / 22
Modern AI Brand Recommendation Rate

How often AI search picks a brand first. Recommendation Rate data from Modern Discovery.

Developer ToolsCode & DevOps

Responded62 ms15 / 22
smry Public Reader

Read and search exact public source URLs with stable paragraph citations.

Developer ToolsCode & DevOps

Responded65 ms15 / 22
OTInstaller Registry

Read-only search of the OTInstaller registry of OSINT tools and guides, with consent classes.

OtherData access / search

Responded69 ms15 / 22
海棠诗社

Search and browse classical Chinese poetry on haitang.app. Read-only and public.

Developer ToolsCode & DevOps

Responded73 ms15 / 22
TanStarter Docs

Search published TanStarter documentation. Read-only and public.

Developer ToolsFile & docs

Responded78 ms15 / 22
Web Search API Eval

Web search API benchmark for AI agents: You.com, Tavily, Exa, Parallel. Results and charts.

Developer ToolsData access / search

Responded80 ms15 / 22
EcoAloha

Search and compare outdoor experiences. Public keyless API; booking and payment happen on Viator.

Finance & CryptoPayments & trading

Responded80 ms15 / 22
Library of Alexandria

Classic books in 25 languages: search, print editions, the free shelf. Read-only, no sign-in.

Developer ToolsCode & DevOps

Responded85 ms15 / 22
Bible Swipe

A Bible reading a day, line by line, any passage by reference, and search.

Developer ToolsCode & DevOps

Responded87 ms15 / 22
Archestack

Search, rank and compare open-source AI projects with Archestack's open data

Developer ToolsCode & DevOps

Responded89 ms15 / 22
CometChat Docs

CometChat docs search + implementation bundles: add chat, voice, video & moderation to your app.

MediaCode & DevOps

Responded90 ms15 / 22
Chain of Thought podcast archive

Search and cite Chain of Thought podcast transcripts and episodes.

MediaCode & DevOps

Responded92 ms15 / 22
Thailand Fun Experiences

Phuket activity search with live weather, sea state, transfer times and party-fit filtering.

Data & AnalyticsData access / search

Responded92 ms15 / 22
Pentest requests, security headers checker, guides

Request a penetration test, grade a website's HTTP security headers, and search pentest guides.

SecurityData access / search

Responded96 ms15 / 22
Ocean of Jobs

Search 1.2M+ open jobs from 22k companies, read full listings and look up employers.

Developer ToolsData access / search

Responded98 ms15 / 22

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