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

7917 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
Agent Kiosk — 23-in-1 B2A Intelligence, Action & x402 API

23-in-1 MCP server: EVM tx simulator, funding rate arb, macro radar, swap calldata & security.

Developer ToolsPayments & trading

Outdated check1058 ms14 / 22
Actora — Agent Identity, Subscriptions & A2A

ERC-8004 agent identity, on-chain subscriptions, reputation, A2A tasks and chat over 53 tools.

Finance & CryptoPayments & trading

Outdated check1124 ms14 / 22
Actora Platform — Agent Publishing, Subscriptions & A2A

Actora developer tools: ERC-8004 identity, subscriptions, listings, A2A, reputation.

Developer ToolsPayments & trading

Outdated check1173 ms14 / 22
Fara

FARA (Foreign Agents Registration Act) MCP.

Developer ToolsCode & DevOps

Outdated check6284 ms14 / 22
Muhu island dialect of Estonian — dictionary and RAG

Muhu island dialect of Estonian, Estonia. RAG, dictionary, newspaper, book and audio references.

MediaAI / LLM tooling

Responded41 ms13 / 22
Swapper - XMR to USDC swaps

Swap Monero (XMR) <-> native USDC on Arbitrum One. No account or API key required. For AI agents.

Finance & CryptoPayments & trading

Responded45 ms13 / 22
com.openwakeword/wake-word-training

Train custom wake words from your agent: estimator, GPU training, benchmarks. Card or crypto.

Finance & CryptoPayments & trading

Responded53 ms13 / 22
SuperSkill Registry

Find, inspect and install reviewed reusable AI-agent capabilities from superskill.sh.

Developer ToolsCode & DevOps

Outdated check54 ms13 / 22
cloud.fetcher/fetcher

The web capability layer for AI agents: render, extract, DNS, SSL, WHOIS & more via x402.

Finance & CryptoPayments & trading

Responded56 ms13 / 22
Wren Pre-sign Check

Check a tx, EIP-712 payload, text or Base token before your agent signs. Paid per call over x402.

Developer ToolsCode & DevOps

Responded59 ms13 / 22
e18e

The official e18e MCP server keeping your agent in check from installing bloated dependencies.

Developer ToolsCode & DevOps

Responded60 ms13 / 22
Cairn — keep your agent's daily build streak (public trail + badge)

Log one line each daily run; grow a public agent build-streak, trail page, and badge. No signup.

Developer ToolsCode & DevOps

Responded61 ms13 / 22
com.modelpricewatch/mcp

Live LLM API pricing: token prices, comparisons, cheapest-model lookups. No key required.

OtherData access / search

Responded61 ms13 / 22
Baron Power Play

Pay-per-call AI infra for agents: DeFi market data, LLM inference, STT/TTS. x402 v2, USDC on Base.

Finance & CryptoData access / search

Outdated check61 ms13 / 22
Fabler x402 Tools

Free catalog and 2,048-character secret-scan preview for Fabler's x402 agent tools on Base.

Finance & CryptoPayments & trading

Outdated check61 ms13 / 22
VendorIndex

Rank vendors/libraries per use case from verified pricing, agent-friction and health.

Developer ToolsCode & DevOps

Responded62 ms13 / 22
Wayreceipt

Proof of delivery for agent work: verify countersigned receipts and deliverable hashes. Free.

Developer ToolsCode & DevOps

Responded62 ms13 / 22
Koot by Datakoot

One-call briefings for AI agents: dependency risk (KEV/EPSS), SEC companies, domains, US places.

Developer ToolsCode & DevOps

Responded62 ms13 / 22
Andromeda Agent Lab

Research on how AI agents find the web: a daily task that's checked automatically, and a guestbook.

Developer ToolsCode & DevOps

Responded62 ms13 / 22
MoneyTools AI Sales Partner program

AI agent affiliate program: 20% of net revenue 12 months + 5% tier 2 (max 2). Not MLM

Marketing & SalesData access / search

Responded63 ms13 / 22
app.agentguestbook/agent-guestbook

Open guestbook for AI agents: read messages and leave a human-reviewed message.

Developer ToolsCode & DevOps

Responded63 ms13 / 22
ai.getvda/rssa

Read and verify signed RSS-A agent feeds; post, reply and react on the RSS-A Agent Network board.

Developer ToolsCode & DevOps

Responded63 ms13 / 22
Ergonia Works

Verifiable work for AI agents: every task carries a condition a stranger can execute.

Developer ToolsCode & DevOps

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

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