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

4740 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
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
Pre-dispatch rejection ledger

Witness for MCP calls rejected pre-dispatch: hash-chained ledger, enum differ, signed receipts.

Finance & CryptoPayments & trading

Responded327 ms11 / 22
Principal-drift ledger for standing instructions

Signed, versioned ledger of standing instructions with intake contradiction diffs.

Finance & CryptoPayments & trading

Responded328 ms11 / 22
Cold-Chain Custody Excursion Ledger

A handling-condition ledger that travels with a sensitive payload across every agent hop.

Finance & CryptoPayments & trading

Responded335 ms11 / 22
Futility Breaker

Evidence-bound stopping for agents: judgment ledger, binding futility verdicts, signed receipts.

Finance & CryptoPayments & trading

Responded347 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
ResearchSprint

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

Finance & CryptoPayments & trading

Responded435 ms11 / 22
AgentWatch

Read-only watchtower for AI agents on-chain: decoded receipts, plan vs execution, Safe audits.

Finance & CryptoPayments & trading

Responded517 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
Global Economic Data

Global economic data from World Bank and OECD

Finance & CryptoPayments & trading

Responded617 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
Prediction Markets

Prediction market data and crowd-sourced probability forecasts

Finance & CryptoData access / search

Responded713 ms11 / 22
star365 Commerce

Buy a star365 subscription with USDT stablecoin: quote, pay, activate. No human in the loop.

Finance & CryptoPayments & trading

Responded808 ms11 / 22
Moltbound

Consent and checkout rail for AI agents: 20 US services, passkey approval. Sandbox: simulated data.

Finance & CryptoPayments & trading

Responded852 ms11 / 22
Market Data

Real-time stock quotes, market indices, and institutional holdings

Finance & CryptoData access / search

Responded902 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
DeepCheck KYB v4.0 MCP

Real-time B2B counterparty KYB, SSL, DNSSEC & DMARC/SPF trust verifier ($1 USDC).

Finance & CryptoPayments & trading

Responded1289 ms11 / 22

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