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

4034 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
Popdot AI

Rent verified subdomains by the hour, day, or month. Free 24h trials, x402 USDC on Base.

Finance & CryptoPayments & trading

Responded658 ms15 / 22
make.fun

Earn USDC on Solana by winning coding bounties: find a bounty, track entries, claim rewards.

Finance & CryptoPayments & trading

Responded659 ms15 / 22
Moltline Business Suite

30 finance, bookkeeping, legal-ops and SMB operations skill products. 6 of 8 tools free.

Finance & CryptoPayments & trading

Responded674 ms15 / 22
SCRIPTMASTERLABS — x402 Gateway

OMNIGATE by ScriptMasterLabs: x402 gateway + facilitator — Base/Arc USDC, 117+ services, no custody.

Finance & CryptoPayments & trading

Responded685 ms15 / 22
Mercury402: Treasury/FRED financial data over x402

Treasury/FRED financial data over x402: pay-per-call US yields, macro and forex in USDC on Base

Finance & CryptoPayments & trading

Responded687 ms15 / 22
Anyway Possible Agent Utilities

A free tool recommender plus eight x402 tools for payments, merchants, wallets, and web evidence.

Finance & CryptoPayments & trading

Responded689 ms15 / 22
OptimistFi

Perpetual futures across 40 venues, perps prop firms and sourced theses on 6,100+ US stocks.

Finance & CryptoPayments & trading

Responded693 ms15 / 22
Anyway Possible Paid Agent Utilities

Paid x402 tools for merchant intelligence, Base payment readiness, and verifiable web evidence.

Finance & CryptoPayments & trading

Responded709 ms15 / 22
MangroveAI

Guardrails for trading agents. Built-in risk management, 100+ tools for strategy R&D, 12+ venues.

Finance & CryptoPayments & trading

Responded714 ms15 / 22
MarketPing

Indian stocks: NSE/BSE filings read by AI with price reactions, fundamentals, IPOs and FPI flows.

Finance & CryptoPayments & trading

Responded717 ms15 / 22
Liquid Agent

Money tools for AI agents over x402: USDC bridge to 16 chains, Polymarket data, stocks, USDC gas.

Finance & CryptoPayments & trading

Responded725 ms15 / 22
Alertio

Real-time DeFi risk data: health factors, liquidations, stablecoin pegs, utilization. No API key.

Finance & CryptoPayments & trading

Responded728 ms15 / 22
Synchronity

Shop connected e-commerce stores: search, compare, cart, and checkout with buyer approval.

E-commercePayments & trading

Responded729 ms15 / 22
afterns

US stock earnings: next-day price reactions, beat/miss history, calendar, call summaries (KO/EN)

Finance & CryptoPayments & trading

Responded759 ms15 / 22
Sato Hub: Build Onchain & Crypto Agents

Build any crypto agent: x402, ERC-8004, wallets. Does a server take your key? Hosted? Maintained?

Finance & CryptoPayments & trading

Responded762 ms15 / 22
TATUAT.RO — Tattoo & Piercing Supplies

Tattoo and piercing supply catalog (Romania): search, live stock, shipping cost, checkout link.

Finance & CryptoPayments & trading

Responded763 ms15 / 22
Boundra — Payment Approval Gateway for AI Agents

Allow, ask, or veto — a policy decision point your agent consults before signing any payment

Finance & CryptoPayments & trading

Responded766 ms15 / 22
Market Eyes Live - stock ratings and mortgage-rate context

Free stock-rating MCP: tier, 0-100 score, 8 factors, 11,000+ US tickers, plus mortgage rates.

Finance & CryptoPayments & trading

Responded768 ms15 / 22
Untap

Check UK Delay Repay, UK261 flights and TfL refunds. Save claims and check commutes on request.

TravelPayments & trading

Responded773 ms15 / 22
vet402

Before your agent pays an x402 URL, see whether vet402 paid it and got the content back.

Finance & CryptoPayments & trading

Responded775 ms15 / 22
RiskState — Crypto Risk Engine

Live BTC/ETH risk state: risk policy, market structure and trading playbooks. Keyless free tier.

Finance & CryptoPayments & trading

Responded806 ms15 / 22
TradingAgentStack

Verified results for AI trading bots, vaults and algo strategies, plus safety scores and incidents.

Finance & CryptoPayments & trading

Responded812 ms15 / 22
x402 Endpoint Check (Tanod)

Check an x402 endpoint before you pay it, then test a payment and follow it to settlement.

Finance & CryptoPayments & trading

Responded881 ms15 / 22
x402 Micropayments MCP

Pay-per-call US city property compliance and Base tx checks, paid in USDC on Base via x402.

Finance & CryptoPayments & trading

Responded894 ms15 / 22

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