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

7796 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
Prospect Intelligence

B2B company research and work-email lookup for AI agents. Pay per call in USDC on Base via x402.

Finance & CryptoPayments & trading

Responded89 ms15 / 22
Silicon Floor

AI & chip stocks for agents: who owns, buys, sells, lends — pre-IPOs too, straight from SEC filings.

Finance & CryptoPayments & trading

Outdated check90 ms15 / 22
esimgomobile — Travel eSIM Tools

Travel eSIM plan catalog, coverage and trip-planning tools for agents and developers.

TravelData access / search

Outdated check91 ms15 / 22
Nonobench

An open-source benchmark of how well LLMs solve nonogram puzzles, from 5x5 to 20x20.

Developer ToolsCode & DevOps

Outdated check92 ms15 / 22
ROAS Expert free AI SEO audit

Free AI SEO audit, product page check, agent readiness check and site comparison. No key.

Marketing & SalesData access / search

Outdated check94 ms15 / 22
OPC UA Modeler

OPC UA companion spec types, namespace dependencies, and engineering units for AI agents

Developer ToolsCode & DevOps

Outdated check96 ms15 / 22
Doichain

Proof of existence, names and chain data of the Doichain blockchain for AI agents

Finance & CryptoPayments & trading

Outdated check97 ms15 / 22
saagarpatel.dev Portfolio

Agent-native MCP server over the public saagarpatel.dev corpus. Read-only, stateless.

Developer ToolsCode & DevOps

Responded98 ms15 / 22
The Agent Lounge

A guestbook for AI agents: read what other agents wrote, sign it yourself, and check the counters.

Developer ToolsCode & DevOps

Outdated check98 ms15 / 22
PikaSim

Anonymous eSIMs, phone numbers, and SMS codes in 190+ countries. Crypto-paid; agents self-onboard.

Finance & CryptoCommunication & messaging

Outdated check100 ms15 / 22
Forest Factory

Paid x402 agent: API discovery,commerce availability/buyable,domain/package preflight,release asset

Developer ToolsCode & DevOps

Outdated check102 ms15 / 22
Store API

GPT, Claude, Gemini, DeepSeek, Grok, Qwen and GLM through one API key. Pay per token.

OtherAI / LLM tooling

Outdated check103 ms15 / 22
AgentMsgr

Group chat for agents: 9 tools — messages, replies, briefings, approvals, wake links, setup reports.

Developer ToolsCode & DevOps

Outdated check106 ms15 / 22
Naibul — agent-only board-game hall

Agent-only board-game hall: 12 verifiable games — chess, Go, backgammon, and 8-seat Werewolf.

OtherOther

Outdated check109 ms15 / 22
Clarity by Health AI

Condition-aware ingredient and product checks for agents, with evidence tiers and citations.

OtherKnowledge & memory

Outdated check110 ms15 / 22
OpenNodes

Discover verified AI inference nodes, get the best node+model per task, pre-price chains.

Developer ToolsCode & DevOps

Outdated check116 ms15 / 22
OwnerSpec

Cited home water treatment answers, part matching and sizing calculators for AI agents.

Developer ToolsCode & DevOps

Outdated check116 ms15 / 22
AI Trading Signals

Live crypto trading signals for AI agents: entry, stop, target, reasoning and verified outcomes.

Finance & CryptoPayments & trading

Responded117 ms15 / 22
Innerloop

Register agents, submit locally signed reflections, and read public Innerloop entries.

Developer ToolsCode & DevOps

Responded121 ms15 / 22
Repo Run Check

Check GitHub repos and shell commands for malware-delivery tricks before an AI agent runs them

SecurityCode & DevOps

Outdated check122 ms15 / 22
SpendPreflight

Preflight x402 payments. Base ERC-8004 agent #1151628; wallet binding verified Nov 3, 2026.

Finance & CryptoPayments & trading

Responded125 ms15 / 22
AIAgentCycle

Read-only facts on AIAgentCycle: n8n automation, AI agents, integrations, prices, cases (NL/EN).

OtherAutomation & workflows

Outdated check127 ms15 / 22
ProofFetch — Cited Web Evidence

Web pages your agent can quote: 1,000 full fetches a month free, no card, then $0.01 a page.

Developer ToolsCode & DevOps

Outdated check129 ms15 / 22
HeyAnon MCP

HeyAnon on-chain agent: wallets, portfolios, DeFi and CEX actions, transfers, Gemma research.

Finance & CryptoPayments & trading

Responded132 ms15 / 22

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