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

3359 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
com.airblockfz/seoul-apt-signal

Seoul apartment signals: 25 districts from official transactions, scans. Pay-per-call x402.

Finance & CryptoPayments & trading

Responded95 ms11 / 22
HexScan Token Security

Honeypot detection & token risk scan for ERC-20s. Risk score 0-100, tax, source verification.

Finance & CryptoPayments & trading

Responded103 ms11 / 22
MLP Tax Computation Engine

Deterministic MLP tax engine with IRS citations. 6 tools: basis, §751, estate, projections.

Finance & CryptoKnowledge & memory

Responded122 ms11 / 22
Money-Engine x402 Research

Free agent discovery + paid x402 research (outline 0.01 / brief 0.02 USDC Base).

Finance & CryptoPayments & trading

Responded139 ms11 / 22
Hookjar

Public webhook inboxes for agents. Receive OAuth redirects, payment callbacks and CI notifications.

Finance & CryptoCommunication & messaging

Responded277 ms11 / 22
Treat Rocks

Buy a $2 novelty digital rock over x402 (USDC on Base). Serves payment instructions only.

Finance & CryptoPayments & trading

Responded324 ms11 / 22
A.X.E.L Filing (public tools)

UK company lookup, filing deadlines, late penalties and Corporation Tax maths. No account.

Finance & CryptoData access / search

Responded326 ms11 / 22
Penny Engine — Agent Operations

Remote MCP utilities for agents: structured data, commerce checks, and x402 paid API discovery.

Developer ToolsCode & DevOps

Responded366 ms11 / 22
LION — Verified Company & Compliance Data

Keyless x402 compliance on Base: $0.001 OFAC wallet screen, $0.05 pack, $0.95 company file.

Finance & CryptoPayments & trading

Responded402 ms11 / 22
NEXUS Agent Utilities

Paid deterministic utilities and automation services for AI agents via MCP and x402.

Developer ToolsAutomation & workflows

Responded429 ms11 / 22
ResearchSprint

AI research reports: market analysis, competitor intel, blog posts. USDC payment.

Finance & CryptoPayments & trading

Responded435 ms11 / 22
APEX Runner Crypto Signals

Live crypto market signals for trading agents, pay-per-call in USDC on Base via x402.

Finance & CryptoPayments & trading

Responded526 ms11 / 22
DeskPulse

Paid MCP for Kraken + Hyperliquid book depth, funding and basis. x402 USDC on Base.

Finance & CryptoCode & DevOps

Responded575 ms11 / 22
DeskPulse

Paid MCP for Kraken + Hyperliquid book depth, funding and basis. x402 USDC on Base.

Finance & CryptoPayments & trading

Responded576 ms11 / 22
LION Trend Intent MCP

Read-only x402-paid trend-intent MCP tools for JSON and CSV signals.

Developer ToolsCode & DevOps

Responded585 ms11 / 22
SCRIPTMASTERLABS — 402Proof

Invoice/verify/score via RLUSD on XRPL. Own settlements proven end-to-end (SELF-PROOF).

Finance & CryptoPayments & trading

Responded682 ms11 / 22
Knox Anchor

Bitcoin-anchored, tamper-evident audit-permanence layer for AI agents, FRE 902(13)/(14)-shaped.

Finance & CryptoPayments & trading

Responded704 ms11 / 22
Ecosystem Monitor

Ecosystem monitoring: service status and x402 activity metrics

Data & AnalyticsMonitoring & observability

Responded922 ms11 / 22
SouthPow API

Pay-per-call data for AI agents in USDC on Base (x402): web search, US insider buys, Polymarket odds

Finance & CryptoData access / search

Responded990 ms11 / 22
NexusSDR AI — 4-Agent B2B Buying-Intent & Outbound Server

Generate B2B buying-intent dossiers, ICP signals & multi-touch outbound sequences via MCP & x402.

Finance & CryptoPayments & trading

Responded1160 ms11 / 22
InvoiceGuard AI v4.0 — B2B Invoice & Tax Compliance Verifier

Cross-Border B2B Invoice Generator, W-8BEN / EU VAT Verifier & Fraud Scanner ($1 USDC, $950 Buyout).

Finance & CryptoPayments & trading

Responded1190 ms11 / 22
AgentPay Gate v4.0 MCP

Drop-in x402 v2 PAYMENT-REQUIRED validator & MCP Ed25519 manifest builder ($1 USDC).

Finance & CryptoPayments & trading

Responded1399 ms11 / 22
io.github.Odds7/fia-signals-mcp

Crypto market intelligence: regime detection, funding rates, liquidations, prices, signals.

Finance & CryptoCode & DevOps

Responded1732 ms11 / 22
io.github.michu5696/agora402

Escrow protection for agent payments on Base — USDC held in smart contract until job completion.

Finance & CryptoPayments & trading

Responded120 ms10 / 22

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