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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18153 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
BART Real-Time Transit

Real-time BART departures, trip planning, fares, stations, and advisories.

Developer ToolsCode & DevOps

Responded87 ms14 / 22
io.github.paxton888/basecite

Tenant-scoped evidence intake and controlled AI context over MCP.

Real Estate & PropertyCode & DevOps

Responded87 ms14 / 22
HTTP 402 AI Tollbooth

Free MCP troubleshooting-preview tools; purchases stay human-directed.

Developer ToolsCode & DevOps

Responded87 ms14 / 22
Botworthy

Check whether a website works for AI agents before visiting it, and the steps that worked.

Developer ToolsCode & DevOps

Responded87 ms14 / 22
ANIME INTELLIGENCE / AI PURCHASE INTELLIGENCE

AI commerce intelligence for anime, industrial parts, replacements, sourcing and agent buying.

MediaCode & DevOps

Outdated check87 ms14 / 22
JustOneAPI

Discover social and commerce APIs without login; authenticate for API calls and account data.

Developer ToolsCode & DevOps

Outdated check87 ms14 / 22
official.tokyo.jp

Human-verified guide to official procedures in Tokyo for foreign residents. Not a government site.

GovernmentCode & DevOps

Outdated check87 ms14 / 22
Wenbu · 问卜

Free BaZi, I Ching, tarot, Zi Wei and bilingual learning tools with transparent methods. No API key.

Developer ToolsCode & DevOps

Responded88 ms14 / 22
SemverKit

Semver parse, compare, npm range checks, max-satisfying and version bumps (node-semver compatible).

Developer ToolsCode & DevOps

Responded88 ms14 / 22
adfraudit – Klickbetrug / Click Fraud

Wissen zu Klickbetrug, Anbieter-Vergleich und kostenloses Audit von adfraudit.com

Developer ToolsCode & DevOps

Responded88 ms14 / 22
Mlola UI

Mlola UI components, tokens and design rules for coding agents, with a markup checker

Developer ToolsCode & DevOps

Outdated check88 ms14 / 22
fresh-feeds — trending/new/changed MCP servers + x402 change-data API

Trending/new/changed MCP servers: a liveness-probed freshness index + x402-paid change-data API

Developer ToolsCode & DevOps

Outdated check88 ms14 / 22
ChineseWorkSheet — Vector Hanzi Grid Geometry, Stroke Order & HSK Analyzer

Calculate Tian Zi Ge grids, decompose Hanzi strokes, grade HSK 3.0 words & convert Pinyin tones.

Developer ToolsCode & DevOps

Responded89 ms14 / 22
KH Merch Graph

Identifies Kingdom Hearts merch from Japanese listing titles: SKU, condition terms, bootleg flags.

Developer ToolsCode & DevOps

Outdated check89 ms14 / 22
Domera: Swedish building compliance

Swedish building compliance: inspections, intervals, legal basis and due dates. Free, read-only.

LegalCode & DevOps

Outdated check89 ms14 / 22
jmiszewicz - wycena i zapytania o strone internetowa

Wycena strony internetowej, brief projektu i wyslanie zapytania do pracowni jmiszewicz.

Developer ToolsCode & DevOps

Responded90 ms14 / 22
Toolcard

Cited checks for one MCP tool or a tools list, plus a called-or-ignored tally.

Developer ToolsCode & DevOps

Responded90 ms14 / 22
io.github.zp130221/pdfedit-mcp

Edit text inside existing PDFs: replace, delete, redact, insert, fill forms; original fonts kept.

Developer ToolsCode & DevOps

Responded90 ms14 / 22
Smart Glasses Atlas

Smart glasses research and regional buying links; affiliate links may earn commission.

Marketing & SalesCode & DevOps

Responded90 ms14 / 22
Korea Nationwide Data

Nationwide Korea: bus stops in 138 cities, 30-year climate normals, tourism (KR/EN).

TravelCode & DevOps

Outdated check90 ms14 / 22
Seiche, LiquiLens and Undertow source data

Funding histories, bank filings and settlement data with source receipts, units and capture clocks.

Developer ToolsCode & DevOps

Outdated check90 ms14 / 22
io.github.trondbjoroy/met-mcp

Weather forecasts from MET Norway (Yr): geocoding plus hourly forecasts worldwide.

Data & AnalyticsCode & DevOps

Responded91 ms14 / 22
Mercury / The Garden

A persistent public environment where AI agents leave artifacts and exchange asynchronous replies.

Developer ToolsCode & DevOps

Outdated check91 ms14 / 22
Sigao Li — personal MCP server

Read-only access to Sigao Li's profile, CV and case studies. Bilingual (EN/ZH).

Developer ToolsCode & DevOps

Outdated check91 ms14 / 22

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