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.

Connect your agent

7962 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
Liars Town Arena

Play Werewolf against other AI agents. join once, then loop observe/act. Public ELO leaderboard.

Developer ToolsCode & DevOps

UnreachableNot measured5 / 22
llms.txt for agents

Any site's llms.txt: find the covering index, read its linked docs as markdown, search sections.

Developer ToolsFile & docs

Outdated checkNot measured5 / 22
Longwave

Give AI agents a creator's video pipeline: Shorts, thumbnails and YouTube publishing.

MediaAI / LLM tooling

UnreachableNot measured5 / 22
Lulu Registry MCP

Search and get install details on MCP servers, right from your agent -- a unified marketplace index.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Lumen Agent Utilities

x402 agent tools: calldata/EIP-712/x402 decoders, web→MD, ENS, DNS, PubMed, arXiv, SEC, weather

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Mac YOLO Safeguards — Runaway Reaper & Token Budget MCP

macOS process-tree reaper, simulator runaway guard, and $10/mo token cap for AI coding agents.

Developer ToolsCode & DevOps

UnreachableNot measured5 / 22
Mahshar

Free API discovery for AI agents; execution may require USDC/x402 payments on Arc Mainnet.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Market Intel MCP

Live & historical FX rates and currency conversion for AI agents. No API keys.

Finance & CryptoCode & DevOps

Outdated checkNot measured5 / 22
Outdated checkNot measured5 / 22
MCPVOT — x402 Facilitator Machine

x402 paid APIs for AI agents on Base. Blockchain, wallet, DEX, crypto, web search.

Finance & CryptoData access / search

Outdated checkNot measured5 / 22
Mercadopleis

AI agents hire people for work they can't finish alone, paid via stablecoin escrow on Base.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
MEV Intelligence

Real-time Ethereum liquidation intelligence for AI agents and MEV bots.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
MicroScrape

Pay-per-request webpage-to-Markdown extraction for AI agents. $0.005 USDC via x402 on Solana.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
MISSING

Fallback capability resolver for AI agents with replay-verified discovery and x402 paid execution.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
MORVS

Keyless, read-only US public records for agents: SEC, FDA, enforcement, sanctions, market data.

Finance & CryptoData access / search

Outdated checkNot measured5 / 22
NDASentry

Anonymous NDA risk analysis for AI agents. $9 per report. No signup, no data retention.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
NeuralBrain

NeuralBrain MCP Server - RAG, Vector Memory, LLM Routing, Agent Identity, x402 Payments

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
nexus0-agent-rail

Pay-per-call DNS/TLS truth and npm/PyPI breakage checks via x402. No account or API key.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Northcap Signals

Pay-per-call DRT/ICT crypto trading signals for AI agents (LONG/SHORT, entry/SL/TP).

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Numbers Online — phone intelligence

Read-only phone intelligence for AI voice agents — line type, risk, DNC, signed receipts.

Developer ToolsCode & DevOps

UnreachableNot measured5 / 22
Offense

Security tools for coding agents: dependency advisory audits and evidence for remediation.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
OmniDome by HumanMirror

Free agent home and discovery: Clean JSON, advisory Safe Preflight, MCP and x402 tools.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
OpenGit

Search agent-ready open source repos by task, interface, ecosystem and OG score.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
OutcomeCI

Create, validate, and manage agent-powered workflows with OutcomeCI.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22

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