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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3337 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
io.github.sanhaoyoung/sanhao-global-experts

885 paid business skills for brand, restaurant & marketing. x402 USDC per call on Base.

Finance & CryptoPayments & trading

Responded3665 ms13 / 22
x402 economy tools

Measured x402 ecosystem data, facilitator reliability, and live endpoint checks.

Finance & CryptoPayments & trading

Outdated check6070 ms13 / 22
Coinmarketcap

CoinMarketCap MCP — crypto prices, market cap, rankings

Finance & CryptoCode & DevOps

Outdated check6092 ms13 / 22
Coinpaprika

Coinpaprika MCP — alternative crypto data source

Finance & CryptoCode & DevOps

Outdated check6098 ms13 / 22
Crypto

Crypto MCP — cryptocurrency prices and currency conversion.

Finance & CryptoCode & DevOps

Outdated check6141 ms13 / 22
Brapi

brapi.dev MCP — Brazilian stock + crypto + ETF quotes.

Finance & CryptoCode & DevOps

Outdated check6152 ms13 / 22
Blockstream Info

Blockstream.info Esplora MCP — Bitcoin block/tx/address explorer.

Finance & CryptoPayments & trading

Outdated check6159 ms13 / 22
DeriveAI x402 APIs

25 pay-per-request intelligence APIs for AI agents via x402 micropayments (USDC/Base)

Finance & CryptoPayments & trading

Outdated check6465 ms13 / 22
XRPLHub — XRPLScore, MPT issuer risk & payment pre-checks

XRPL wallet scores, wallet permissions, batch send, MPT risk, screening, pre-checks. Never signs.

Finance & CryptoPayments & trading

Outdated check6491 ms13 / 22
CanaryGuard 402

Deterministic prompt-injection detection & sanitization for AI agents via x402 on Base.

Developer ToolsCode & DevOps

Outdated check6672 ms13 / 22
Crypto Data & Market Analysis Agent

Crypto positioning and macro for agents: funding, open interest, execution cost, volatility

Finance & CryptoCode & DevOps

Outdated check19 ms12 / 22
SendCheck — EVM address verification (x402)

Pre-send EVM address checks: free pre-check, $0.01 check, $0.05 deep scan. x402: payment is auth.

Finance & CryptoPayments & trading

Outdated check42 ms12 / 22
Yasha Hotel — Direct Booking

Book Yasha Hotel Luxembourg: live availability, exact prices, Stripe-secured booking.

Finance & CryptoPayments & trading

Responded49 ms12 / 22
PolyPulse: Polymarket odds & movers

Live Polymarket odds, 1h/24h movers, top markets. Free previews; full data via x402 USDC on Base.

Finance & CryptoPayments & trading

Responded56 ms12 / 22
Falcon Shield

Pre-sign Solana tx guard for agents: ALLOW/WARN/BLOCK verdict, x402 USDC pay-per-call.

Finance & CryptoPayments & trading

Responded60 ms12 / 22
com.x402supply/pii-redact

Detects and redacts PII (emails, phones, SSNs, names, addresses) from text. $0.02/call via x402.

ProductivityCommunication & messaging

Responded61 ms12 / 22
app.surewhynot.quartermaster/quartermaster

x402 toolkit for AI agents: paid web, AI, and Base chain tools per call in USDC. Free tools too.

Finance & CryptoPayments & trading

Responded61 ms12 / 22
sol-defi-desk

Paid Solana token safety checks over Streamable HTTP MCP (x402 USDC on Solana + Base).

Finance & CryptoPayments & trading

Responded64 ms12 / 22
io.github.holsson95/mythaitaxes-mcp

Free Thai personal income tax (PIT) calculator for salaried employees, from mythaitaxes.com.

Developer ToolsCode & DevOps

Responded65 ms12 / 22
com.x402supply/hts-classify

Classifies products into HS/HTS customs codes for import/export workflows. $0.10/call via x402.

Finance & CryptoAutomation & workflows

Responded67 ms12 / 22
POKT Agent Korea data (x402 paid)

Korean company due diligence, sanctions screening, Upbit/Bithumb events, HWP. Pay per call (x402).

Developer ToolsCode & DevOps

Responded67 ms12 / 22
nextbank.holiday

Next bank holiday for UK, Ireland, France, Germany and Spain. Free daily quota, then USDC via x402.

Finance & CryptoPayments & trading

Outdated check67 ms12 / 22
orbit x402 Picks

Which x402 endpoint to call: ranked by relevance, payers, recency, price. $0.005/call via x402.

Finance & CryptoPayments & trading

Responded68 ms12 / 22
L50 Data Tools

Every L50 data API in one MCP server: UK companies, tenders, property, eBay, YouTube. x402 USDC.

Finance & CryptoPayments & trading

Responded69 ms12 / 22

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