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.

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3362 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
UNLAV Supplier Quote Compare

Compare complete supplier quotes with exact totals and shipping. 0.05 USDC on Base via x402.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Utilia Solana Transaction Evidence

Solana transaction diagnosis, simulation, token-risk evidence, and priority fees via x402 USDC.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
UXUS Agent Services: wallet lookup, entity labels, caller ID

Free wallet lookup, ENS, labels, caller ID. Paid x402: search, scrape, XRP yield and lending grades

Finance & CryptoData access / search

Outdated checkNot measured5 / 22
VaultRubric

Sourced, scored comparisons of crypto exchanges, wallets, savings accounts and brokerages.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Vayancy TravelOS

Mediterranean luxury villa booking rail with real-time PMS inventory & direct Stripe holds.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
VeraData

Verified LATAM data for AI agents: sanctions, entity, rates, KYB. Pay via x402.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Verified Numbers

Current source-cited 2026 US tax constants and calculators for AI agents; every answer cites IRS.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Verify China Supplier | Supplier Check

Verify a Chinese supplier before you pay: company identity, status, risk signals. x402 per call.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Wallet Doctor

Solana wallet forensics SDK, x402 pay-per-call, AI agents.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
Wealth Agent

x402 pay-per-call tools for AI agents: code review, data clean, briefs, regex, diff, URL meta.

Developer ToolsCode & DevOps

Outdated checkNot measured5 / 22
Web3 DNS (CNSLookup)

Read-only lookup of verified crypto wallet addresses for domains, .cns and ENS names.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Web3 Signals

AI crypto buy/sell signals for 20 assets: 6 data dimensions fused into 0-100 scores. x402 + MCP.

Finance & CryptoCode & DevOps

Outdated checkNot measured5 / 22
x402 Agent Tollbooth

On-chain DeFi smart contract auditor, arbitrage scanner, and agent tollbooth via x402 on Base.

Finance & CryptoCode & DevOps

Outdated checkNot measured5 / 22
x402 MCP Starter

Free self-hosted x402 USDC billing for Cloudflare MCP servers, with a Base Sepolia test endpoint.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
ai.avasis/quant-research

Crypto backtest statistics: the server owns the trial count, so it cannot be understated.

Data & AnalyticsData access / search

Requires authNot measured5 / 22Not checked yet
ai.marketintell/marketintell

AI analyst desk for stocks, options & crypto with sourced trade setups and a public accuracy record.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22Not checked yet
co.churnkey/churnkey

Read and manage Churnkey cancel flows, retention metrics, and payment recovery

Finance & CryptoPayments & trading

Requires authNot measured5 / 22
com.accountingqb/accountingqb

QuickBooks Online for Claude: reports, bookkeeping cleanup, and US & Canadian tax prep.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22
com.bykaranteli/mcp

Crypto derivatives data: funding, OI, liquidations, options, ETF flows. Free account key required.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22Not checked yet
com.inboxpolicy/send-decision

Send-decision email verification: agents get send/review/avoid with evidence, pay-per-call via x402.

ProductivityCommunication & messaging

Requires authNot measured5 / 22Not checked yet
com.jupitersignup/jupitersignup

List, read, create, and edit JupiterSignup sign-up and payment forms. API key required.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22
com.seenpaid/seenpaid

Agentic social media scheduler: 21 platforms, 50 MCP tools, and which posts made money via Stripe.

Marketing & SalesPayments & trading

Requires authNot measured5 / 22
com.taxlocus/taxlocus

US sales tax for AI agents: rates, economic nexus, taxability, filing. Citation-backed.

Finance & CryptoKnowledge & memory

Requires authNot measured5 / 22
com.withtallied/tallied

Log hours and invoice clients from your AI chat. Time tracking and invoicing for freelancers.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22

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