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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4698 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
AgentDiet Base & Solana DEX Whale Orderflow & Accumulation Scanner

Tracks real-time 1h/24h DEX buy/sell orderflow ratios, whale accumulation signals, and liquidity.

Finance & CryptoPayments & trading

Outdated check549 ms14 / 22
AgentDiet DeFi Stablecoin & Liquidity Pool Yield Arbitrage Scanner

Scans live DeFiLlama APYs, TVL depth, and risk-adjusted yield spreads across Base, Arbitrum, Sola.

Finance & CryptoPayments & trading

Outdated check551 ms14 / 22
io.github.onrampbtc/proof-of-custody

Bitcoin custody scores, failure registry, ETF custody, stablecoin and x402 data, source router.

Finance & CryptoPayments & trading

Responded554 ms14 / 22
Distill

Pre-computed answers with sources and confidence, paid per call over x402 (USDC on Base).

Finance & CryptoPayments & trading

Responded555 ms14 / 22
URL to Markdown API — ScriptMasterLabs

$0.001/read URL-to-Markdown via x402 on Base. Settle-proven end-to-end 2026-11-02 (SELF-PROOF).

Finance & CryptoFile & docs

Responded555 ms14 / 22
OPX

Buyer-side machine commerce: choose where to spend using recent paid x402 provider evidence.

Finance & CryptoPayments & trading

Responded558 ms14 / 22
XRPL-Utilities

XRPL data tools for AI agents: wallet classifier, signals, RWA tracker, ETF flows. Pay via x402.

Finance & CryptoPayments & trading

Responded561 ms14 / 22
RQM Studio Jobs

Delegate 20 fail-closed RQM Studio quantum work products with fixed-request x402.

Finance & CryptoPayments & trading

Outdated check561 ms14 / 22
SmartFin

Backtest S&P 500 stocks and ETFs on real prices, plus loan, savings, FIRE and retirement tools.

Finance & CryptoPayments & trading

Responded562 ms14 / 22
Grideōs Facts

Read-only facts about Grideōs from its signed, hash-chained ledger. Verify before you cite.

Finance & CryptoPayments & trading

Responded563 ms14 / 22
TeamPredict HR Calculators

HR, payroll and date calculators: turnover, eNPS, US take-home pay, bonus tax, overtime. No key.

Finance & CryptoPayments & trading

Responded564 ms14 / 22
SavePropTax

Free check of a California home for a Proposition 8 property tax reduction, plus owner filing.

Finance & CryptoPayments & trading

Outdated check565 ms14 / 22
Neuron Sports Ad Exchange

Autonomous AI sports ad exchange with quote-bound Stripe settlement and live delivery telemetry.

Finance & CryptoPayments & trading

Responded567 ms14 / 22
Signo

AI agents that watch DeFi positions: read a wallet report, draft agents for the owner to sign.

Finance & CryptoPayments & trading

Outdated check567 ms14 / 22
SignalHarness.ai

330 production AI-agent services for data, validation, AI, crypto, and x402 pay-per-use.

Finance & CryptoPayments & trading

Responded568 ms14 / 22
Leal

Design and launch Apple Wallet and Google Wallet loyalty stamp cards for your shop, café or salon.

Finance & CryptoPayments & trading

Responded569 ms14 / 22
AgentLedger

Meter, cap, and block AI agent spend before the provider is charged.

Finance & CryptoCode & DevOps

Outdated check569 ms14 / 22
Piku

Find creators and read their Rate Cards. Creators draft quotes and invoices on their Piku account.

Finance & CryptoPayments & trading

Outdated check569 ms14 / 22
JetForge

Solana launchpad trading: markets, quotes, wallet balances and unsigned buy/sell transactions

Finance & CryptoPayments & trading

Responded573 ms14 / 22
Paddock

Pre-payment verification for AI agents.

Finance & CryptoPayments & trading

Outdated check574 ms14 / 22
PlainText Wallet Approval Checker

Explains wallet approvals and signature requests in plain language: SAFE, CAUTION or RISK.

Finance & CryptoPayments & trading

Outdated check577 ms14 / 22
MINT Protocol — Universal Work Attestation

Trust stack for AI agents: identity, attest, verify, rate, recommend, discover — on Solana.

Finance & CryptoPayments & trading

Outdated check578 ms14 / 22
SCRIPTMASTERLABS — Triple-Trigger

Triple-Trigger MCP: SPEC v2 triple-trigger ticker scans on live Schwab data. $0.05 x402 on Base.

Finance & CryptoPayments & trading

Responded583 ms14 / 22
Daras MCP by usefulapi

Read products, stock, orders, returns and shipments; update prices and stock in Daras.

Finance & CryptoPayments & trading

Responded585 ms14 / 22

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