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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4707 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
PayStage

Umbrella MCP: payment preflight, auth watch, HIP-3 trade preflight, velocity checks

Finance & CryptoPayments & trading

Responded95 ms13 / 22
Trust Check

Base crypto safety for agents: honeypot/tax test, address poisoning, rug feed, creator record.

Finance & CryptoCode & DevOps

Responded95 ms13 / 22
Bitcoin Power Law (btclaw.io)

Live Bitcoin power-law data: price vs trend, trend and bands on any date, when BTC reaches a price.

Finance & CryptoPayments & trading

Responded95 ms13 / 22
Eudigo – EUDI Wallet index

Independent EUDI Wallet index: status in all 27 EU states, deadlines, registers, standards, news.

Finance & CryptoPayments & trading

Responded95 ms13 / 22
io.github.tony8713/casa

Private, permanent encrypted storage for AI agents. Paid per call in USDC via x402.

Finance & CryptoPayments & trading

Responded95 ms13 / 22
Fiscalo MCP by usefulapi

Read and create customers, items and draft invoices in Fiscalo.

Finance & CryptoPayments & trading

Responded95 ms13 / 22
Усилитель сигнала

Cellular signal booster shop in Moscow: catalog, live prices and stock, equipment picks, order link

Finance & CryptoCode & DevOps

Outdated check96 ms13 / 22
io.github.klever-io/mcp-klever-vm

MCP server for Klever blockchain smart contract development.

Finance & CryptoPayments & trading

Outdated check96 ms13 / 22
x402 Agent Tools

Pay-per-call web, Base onchain and crypto-alert tools for agents. USDC on Base via x402, no API key.

Finance & CryptoPayments & trading

Outdated check97 ms13 / 22
Tradoshi rankings and research

2027 rankings of trading schools and prop firms, every criterion sourced, plus market data

Finance & CryptoData access / search

Responded98 ms13 / 22
MEO Preflight

Read-only machine payment preflight using dated MEO evidence, with explicit unknowns.

Finance & CryptoPayments & trading

Responded98 ms13 / 22
entsoe-mcp

European power-market data: day-ahead & balancing prices, load, generation, flows, outages. 47 zones

Finance & CryptoData access / search

Responded98 ms13 / 22
io.github.Vertisky/toolalize-mcp

Free unit & live currency conversion tools from toolalize.com (convert_units, convert_currency).

Finance & CryptoCode & DevOps

Responded98 ms13 / 22
Datoka Agent

Signed agent execution declarations. Free verification; issuance 0.002 USDC via x402 on Base.

Finance & CryptoPayments & trading

Responded99 ms13 / 22
WELANDA Engraving Designer

Design a laser engraving for a WELANDA snus case, preview it and hand the user a checkout link.

Finance & CryptoPayments & trading

Responded99 ms13 / 22
CoinPaprika

Real-time crypto market data: prices, tickers, exchanges, OHLCV candles, and metadata.

Finance & CryptoData access / search

Responded99 ms13 / 22
uk.co.hopi/hopi

Free UK calculators, converters and validators (tax, VAT, stamp duty, dates, units), read-only.

Finance & CryptoPayments & trading

Outdated check99 ms13 / 22
eglise.shop — Christian bookstore (FR/EN)

Christian bookstore (French/English): search books, prices in 12 currencies, cart, checkout link.

Finance & CryptoPayments & trading

Responded100 ms13 / 22
IranTools (paid)

Persian and Iranian utilities for agents plus text tooling. Paid via x402 or MPP.

Finance & CryptoPayments & trading

Outdated check100 ms13 / 22
PaidPilot Invoice Tools

Invoice tools: reminders, late fees, terms, timesheets and a receivables health report (x402).

Finance & CryptoPayments & trading

Responded102 ms13 / 22
HoldKit

Idempotency keys, locks, timers, and inboxes for agents over MCP. No payments.

Finance & CryptoPayments & trading

Responded104 ms13 / 22
PayperAnswer

Pay-per-call chat on GPT-6.1, Claude, Gemini and Grok over x402. No API key; a failed call is free.

Finance & CryptoAI / LLM tooling

Responded105 ms13 / 22
Datoka API

Signed API declarations for agent handoffs. Free demo and verification; receipts cost 0.002 USDC.

Finance & CryptoPayments & trading

Responded107 ms13 / 22
Safe Rate

US mortgage rate estimates, lender rankings and research, and US Treasury market data.

Finance & CryptoData access / search

Responded107 ms13 / 22

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