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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5041 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
Crawler Log Triage

{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"whoami","arguments":{}}} free no key

OtherBrowser & web scraping

Responded62 ms13 / 22
Storefront Check

Audit any storefront from outside: ad tags, dead-tag detection, AI crawler access, feed readiness.

E-commerceBrowser & web scraping

Responded63 ms13 / 22
sh.knowngood/knowngood

Search agent-ready sites or fetch one site's report; every capability probe-verified, dated.

Developer ToolsData access / search

Outdated check63 ms13 / 22
LunarWerx

Canonicalize Tailwind classes to their short form, and search LunarWerx free dev tools.

OtherData access / search

Responded64 ms13 / 22
Setu.Anantasutra: Agent Tools API

Pay-per-call (x402) tools: Indian ID checks, AI-visibility audits, AI crawler and llms.txt checks

Developer ToolsBrowser & web scraping

Responded65 ms13 / 22
Rolston Paul field notes

Read-only search and reading of the field notes on rolstonpaul.com, quoted word for word with URLs.

ProductivityData access / search

Responded65 ms13 / 22
Agent Workspace Practice

Search + patterns, maturity assessment, context pricing, redaction checks - a practice as tools.

Developer ToolsCode & DevOps

Responded66 ms13 / 22
Highland Intel APIs

70 pay-per-call APIs: DNS, email auth, security headers, web search, scraping, AI. x402 USDC/Base

Finance & CryptoData access / search

Responded67 ms13 / 22
AEO Auditor — AI Search & Agent Readiness Engine

Live AEO, GEO, JSON-LD Schema, robots.txt AI crawler, and Agent Readiness diagnostic auditor.

Developer ToolsBrowser & web scraping

Responded68 ms13 / 22
runchr

A curated registry of agent stacks: search by job, get the tools, prompt, and install plan.

Developer ToolsCode & DevOps

Responded69 ms13 / 22
ThirdMade Shelf

26 pay-per-call tools for agents: scrape, verify, guards, crypto. x402 USDC on Base.

Finance & CryptoPayments & trading

Responded70 ms13 / 22
Remove EXIF Online Guidance

Read-only guidance on removing photo and video metadata with Remove EXIF Online's browser tools.

MediaAI / LLM tooling

Responded70 ms13 / 22
com.momenticmarketing/momentic

Free SEO, GEO, and AEO audits: analyze any page or domain, AI-crawler access, agent readiness.

Marketing & SalesBrowser & web scraping

Responded71 ms13 / 22
GovAPI Atlas

Search 77k public-sector open data APIs across 10 countries. Read-only, no API key.

GovernmentData access / search

Responded72 ms13 / 22
EveryAI

Search EveryAI's reviewed directory of 2,000+ AI tools by task, and check or prepare listings.

OtherData access / search

Responded72 ms13 / 22
io.github.musikalienhandel-de/mcp-server

Product search for musikalienhandel.de: sheet music, GEWA instruments, B-Ware/clearance stock.

Finance & CryptoCode & DevOps

Outdated check73 ms13 / 22
co.theoldways/library

Search historical texts and mythology references with citation URLs from The Old Ways library.

OtherKnowledge & memory

Responded74 ms13 / 22
Faceabot Deep search

One question searched in science, world news, Internet Archive, GitHub and discussions. Free.

Developer ToolsCode & DevOps

Responded75 ms13 / 22
ProfitShop

Search ProfitShop (profitshop.gr, Greece) products: current price, stock and product links.

Finance & CryptoData access / search

Responded76 ms13 / 22
Starbelo

Search real AI money-making use cases, AI tools and prompts from Starbelo. Free, read-only.

Developer ToolsData access / search

Responded76 ms13 / 22
AI Tools Directory

Curated index of 221 AI tools across 21 industries. Search by use case, department or pricing tier.

OtherData access / search

Responded76 ms13 / 22
PlainError

Plain-English fixes for Windows, PC games, and code. Search or paste an error. No account needed.

OtherData access / search

Outdated check76 ms13 / 22
Myworker — 20 paid crypto & AI micro-APIs (x402)

20 paid micro-APIs: token price, DeFi APY, FX rates, web scraping. Pay USDC per call.

Finance & CryptoBrowser & web scraping

Outdated check76 ms13 / 22
dev.passagens/passagens-api

Brazil-first flight price search for AI agents: Portuguese place names, BRL, disclosed affiliate

TravelData access / search

Responded77 ms13 / 22

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