MCP HeartbeatTHE MCP OBSERVATORY
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Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

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DiscoveryServer directory

Remote MCP servers

Find a server for your workflow, with connection evidence you can inspect.

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7868 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
AETHER by ANGELS

Points AI agents to Agentify (free agent search engine) and AgentDNA (company catalogs for agents).

Developer ToolsData access / search

Responded86 ms14 / 22
zRev AI

Grade any llms.txt, cold-read a homepage, run a B2B GTM ROI model, get a GTM diligence checklist.

OtherOther

Responded86 ms14 / 22
Pixel Agent

Convert images to PNG, JPEG, WebP, or AVIF through one public remote MCP tool.

MediaCode & DevOps

Outdated check86 ms14 / 22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Outdated check87 ms14 / 22
agent-web — URL to LLM-ready markdown: a polite, robots-respecting web page reader (free)

URL to clean markdown for LLMs: a polite, robots.txt-respecting web reader. Free, no API key

Developer ToolsFile & docs

Outdated check87 ms14 / 22
Ophis MCP

Gasless, MEV-protected onchain token swaps for AI agents on 14 EVM chains, built on CoW Protocol.

Finance & CryptoPayments & trading

Outdated check87 ms14 / 22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Outdated check88 ms14 / 22
JustAutomate website

JustAutomate, AI agents and process automation agency: site search, pages, workshop price, contact.

OtherAutomation & workflows

Responded89 ms14 / 22
ScreenshotMCP

Desktop and mobile website screenshots plus page context for AI agents and automation workflows.

Developer ToolsAutomation & workflows

Outdated check90 ms14 / 22
WebRef (paid)

Web standards and time reference for agents: HTTP codes, retries, deadlines. Paid via x402.

Finance & CryptoPayments & trading

Outdated check90 ms14 / 22
HolicAudit website checks

Free SEO, AI visibility (AI crawlers, llms.txt, JSON-LD) and security-header checks for any URL.

Marketing & SalesBrowser & web scraping

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
MemoryRouter

Persistent AI memory shared across Claude, ChatGPT, coding agents, and compatible MCP clients.

Developer ToolsAI / LLM tooling

Responded92 ms14 / 22
CollectSEA

Find real software, security and AI-agent failures that resemble your design, with safeguards.

Developer ToolsCode & DevOps

Outdated check92 ms14 / 22
FabTally Guard

Verify before you act: deps-check, x402-preflight, json-repair & url-read for agents.

Developer ToolsCode & DevOps

Responded93 ms14 / 22
HeyClaude — Claude & AI workflow directory

Search the HeyClaude directory of Claude Code agents, MCP servers, skills, and tools.

Developer ToolsCode & DevOps

Outdated check93 ms14 / 22
ENTIA Entity Verification

Verified business identity for AI agents: 11.3M entities, EU VAT (VIES), BORME, GLEIF. Free trial.

Developer ToolsCode & DevOps

Outdated check93 ms14 / 22
AgentSiteAudit

Website audits for AI agents: 69 checks with exact fixes, plus verify. 5 free a day, then x402.

Finance & CryptoPayments & trading

Responded94 ms14 / 22
Ciro Cesar Maciel — Free Tools

Free, no sign-in: favicons, web to Markdown, CSV to chart, text to speech, time zones, passwords.

MediaAI / LLM tooling

Responded94 ms14 / 22
gtinfetch – Agentic Commerce

gtinfetch — the GTIN resolver for AI agents. Any barcode, one call. 84M GTINs. x402 at the door.

Finance & CryptoPayments & trading

Responded94 ms14 / 22
addrbook directory

Look up AI agents, MCP servers and x402 APIs: whether they answer, how they ask to be paid.

Finance & CryptoData access / search

Responded95 ms14 / 22
The Aggregate — LLM benchmark aggregate

LLM rankings from public benchmarks, model comparisons and source-linked results. Updated daily.

Developer ToolsAI / LLM tooling

Responded95 ms14 / 22
Business Agent OS

A free, read-only remote MCP server with templates for a file-based business operating system.

Developer ToolsCode & DevOps

Outdated check95 ms14 / 22

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