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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7871 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
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Outdated check93 ms14 / 22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Outdated check93 ms14 / 22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Outdated check95 ms14 / 22
Agent Revenue Network

Paid deterministic data-quality and execution-verification tools for AI agents.

Developer ToolsCode & DevOps

Responded96 ms14 / 22
Awardia

EU public tenders for AI agents: open tenders, award history, competitors and bid intelligence.

Developer ToolsCode & DevOps

Responded96 ms14 / 22
blip.zone, the Agent Bazaar

Open network of AI agents: search, posts, replies, reports. Run by AI agents for Kalo Software GmbH.

Developer ToolsData access / search

Responded98 ms14 / 22
Openhook

Private channels for people and their AI agents.

Developer ToolsCommunication & messaging

Outdated check98 ms14 / 22
Agent Revenue Network

AI jobs, contracts, execution proof, translation and data quality over MCP + x402 USDC on Base.

Finance & CryptoPayments & trading

Responded99 ms14 / 22
bitfence Risk Oracle

Pre-transaction token risk checks for autonomous agents on six chains. Read-only; paid via x402.

Developer ToolsCode & DevOps

Outdated check99 ms14 / 22
WebsiteIQ

Robots-aware website audits, pre-crawl quotes, and structured evidence for people and agents.

Developer ToolsBrowser & web scraping

Outdated check100 ms14 / 22
Makeroo

Search the Makeroo product directory and submit your product from your own agent.

Developer ToolsData access / search

Responded101 ms14 / 22
Agent Ready Report

Scan any public website and see how ready it is for AI agents and AI search, explained plainly.

Developer ToolsData access / search

Responded101 ms14 / 22
a4sx sessions

Search reviewed coding-agent sessions on a4sx anonymously; sign in (OAuth) to load or save sessions.

Developer ToolsData access / search

Outdated check101 ms14 / 22
Doseedo: Film Scoring, AI Instruments, Sound Effects & Stems

Score video, make music as an agent: 100+ AI instruments play your MIDI, audio, stems, Logic/Ableton

MediaAI / LLM tooling

Responded102 ms14 / 22
com.83blue.upload/agent-cloud-tools

Free no-signup cloud tools for AI agents: file transfer, static site hosting, memory, handoff.

Developer ToolsKnowledge & memory

Responded104 ms14 / 22
402MCP.org — HTTP 402 & Agent Payment Registry

Decode HTTP 402 challenges (L402, x402, MPP) and choose agent payment rails from an open registry.

Finance & CryptoPayments & trading

Responded104 ms14 / 22
RugShield — Solana Token Safety Scanner

Solana token rug-pull detection for AI trading agents. Score, authorities, liquidity.

Finance & CryptoPayments & trading

Responded104 ms14 / 22
Lightning · AI Visibility Data

AI-visibility studies for agents: how ChatGPT, Gemini and Claude answer, any region or industry.

Developer ToolsAI / LLM tooling

Outdated check104 ms14 / 22
Scrapiq

Any URL to clean text, markdown, or JSON for LLM/RAG pipelines.

Developer ToolsFile & docs

Responded105 ms14 / 22

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