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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3357 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
CryptoData API

Crypto MCP with 21 tools for market data, DeFi, analytics, and sentiment. Post-paid USDC billing.

Finance & CryptoData access / search

Responded134 ms12 / 22
Japan Business Calendar MCP

Japanese business days, holiday checks and invoice due dates for your AI agent.

Finance & CryptoPayments & trading

Outdated check136 ms12 / 22
Canada Business Calendar MCP

Canadian federal and provincial holidays, business-day maths and invoice due dates.

Finance & CryptoPayments & trading

Outdated check136 ms12 / 22
US Business Calendar MCP

US federal holidays, business-day maths, invoice due dates and IRS deadlines.

Finance & CryptoPayments & trading

Outdated check142 ms12 / 22
Responded148 ms12 / 22
DejaBars

Find historical chart-pattern matches across crypto markets from a sketch.

Finance & CryptoData access / search

Responded150 ms12 / 22
Stablecoin rails, corridors and payment provider data

Cited stablecoin rails, corridors, providers, rail holidays, regulators for agents. x402/MPP paid.

Finance & CryptoPayments & trading

Responded157 ms12 / 22
Orbuc

On-chain stablecoin market cap and Bitcoin institutional holdings data.

Finance & CryptoPayments & trading

Responded164 ms12 / 22
UK Sanctions Screening MCP

Screen names vs the UK Sanctions List (FCDO/OFSI) plus OFAC crypto address checks.

Finance & CryptoCode & DevOps

Outdated check180 ms12 / 22
Irish rent benchmarks and house price comps

Irish rent, rent limits, house price comps (IE, NL, EU), housing report. x402/MPP paid.

Real Estate & PropertyPayments & trading

Responded184 ms12 / 22
Oblique Markets

x402-paid analytics, market intelligence, research, and LLM inference for AI agents.

Data & AnalyticsAI / LLM tooling

Responded220 ms12 / 22
APEX web reader

Web page to markdown $0.002, web read $0.003, page extract $0.009, site extract lite $0.03. x402.

Finance & CryptoFile & docs

Responded223 ms12 / 22
ifthenpay Payments MCP

Remote MCP for ifthenpay payments: Multibanco, MB WAY and Payshop.

Finance & CryptoPayments & trading

Responded263 ms12 / 22
com.ai-rook.agents/trading-mcp

72 x402 endpoints: trading, AI inference, blockchain, escrow. USDC on Base+Solana.

Finance & CryptoPayments & trading

Responded322 ms12 / 22
io.github.mifactory-bot/mifactory-payments

Stripe payments for AI agents. Create links, verify, manage customers.

Finance & CryptoPayments & trading

Responded416 ms12 / 22
app.vercel.stripecheckup/stripecheckup

Scan pasted Stripe webhook/checkout code for common integration bugs.

Finance & CryptoPayments & trading

Responded429 ms12 / 22
x402 Oracle

Paid x402 help: debug 402 errors, review MCP manifests, rewrite Bazaar listings. USDC on Base.

Finance & CryptoPayments & trading

Outdated check456 ms12 / 22
taxmeup.xyz

Free educational tax deduction analysis. Check common deductions with IRS publication citations. Tax

Finance & CryptoKnowledge & memory

Responded462 ms12 / 22
S+S Agentic

Doors for AI agents: witness, letter, poison check, ghost check, wall. No account, no payment.

Finance & CryptoPayments & trading

Responded500 ms12 / 22
loop-mcp

15 pay-per-call Bitcoin and developer tools, paid in sats over Lightning (L402).

Finance & CryptoPayments & trading

Responded538 ms12 / 22
Las Vegas Guide — Resort Fees, Strip Walk Times & 160+ Venues

Out-the-door Las Vegas hotel resort fees, 13.38% tax receipts, Strip walk routing, and show dates.

TravelData access / search

Responded540 ms12 / 22
Primary Source Commodities

Primary-source commodities data for AI agents — EIA, FRED, CFTC, USDA, USGS via x402 on Base.

Developer ToolsCode & DevOps

Responded545 ms12 / 22
Phoenix operational_context unpaid canary

Unpaid qualification-gated operational_context canary. Staging data. No wallet.

Finance & CryptoPayments & trading

Outdated check573 ms12 / 22
Responded600 ms12 / 22

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