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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3336 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
The Quant Space Research Corpus

Scored quant-finance paper corpus. Free search tools plus x402 pay-per-call premium tools.

Finance & CryptoData access / search

Responded364 ms13 / 22
Certidão TJ (Cível, Criminal e Fiscal)

Issues the civil, criminal, and tax clearance of a person or company at the state Court of Justice,

LegalCode & DevOps

Outdated check364 ms13 / 22
NFe Completa

Looks up the full data of an electronic invoice (NFe) from the access key. Platform-hosted, no crede

Finance & CryptoPayments & trading

Outdated check367 ms13 / 22
PRG Risk Oracle

Market regime, 7-dimension risk vectors and payment hazard grades. Abstains when data is thin.

Finance & CryptoPayments & trading

Outdated check370 ms13 / 22
Batchloom Evidence

Free report citation preflight and real-source trials; paid evidence via a local wallet adapter.

Finance & CryptoPayments & trading

Responded373 ms13 / 22
Liquidação de Sentença

Judgment and debt liquidation for AI: sum installments and payments, apply official correction (IPCA

Finance & CryptoPayments & trading

Outdated check373 ms13 / 22
CARF (Recursos Fiscais)

Looks up proceedings of a person or company at the Administrative Board of Tax Appeals (CARF) from t

Developer ToolsCode & DevOps

Outdated check375 ms13 / 22
API Acre

75 x402-paid Base and Solana APIs with free discovery, samples, workflows, and Pixel Acre.

Finance & CryptoPayments & trading

Responded376 ms13 / 22
Certidão de Débitos PF

Issues the joint federal tax debt certificate for an individual from the CPF. Platform-hosted, no cr

GovernmentCode & DevOps

Outdated check379 ms13 / 22
Mercado Financeiro BR

Brazilian financial market data (B3): quotes, fundamentals, dividends, REITs (FIIs), BDRs, crypto, F

Finance & CryptoData access / search

Outdated check380 ms13 / 22
Blackwood State

Pay-per-call tools for agents: onchain data, ECB FX rates, text tools. USDC on Base, x402

Finance & CryptoPayments & trading

Responded382 ms13 / 22
Token Risk Checker

Base token risk screen: rug-pull liquidity, honeypots, copycats. Pay per call via x402 (USDC).

Finance & CryptoPayments & trading

Responded384 ms13 / 22
Ventis

Crypto data for AI agents: prices, Solana wallets, token risk, swap quotes. Pay per call via x402.

Finance & CryptoPayments & trading

Responded385 ms13 / 22
Bybit

Bybit crypto exchange, unified account and Funding wallet balances, open derivatives positions, orde

Finance & CryptoPayments & trading

Outdated check387 ms13 / 22
Brük — verified XRP Ledger answers

Verified XRP Ledger answers with proof: payment, send, and issuer checks. Pay per call via x402.

Finance & CryptoPayments & trading

Responded389 ms13 / 22
Pagar.me

Stone's payments gateway (api.pagar.me), orders, charges (card, Pix, boleto), customers and cards, p

Finance & CryptoPayments & trading

Outdated check389 ms13 / 22
CND Municipal

Issues the municipal tax clearance certificate for a person or company from the CPF or CNPJ, municip

GovernmentCode & DevOps

Outdated check389 ms13 / 22
ca.arrowmem/arrowmem-mcp

Canadian public-sector data and legal information for AI agents, paid per call in USDC over x402

GovernmentPayments & trading

Responded392 ms13 / 22
SentEdge Idea Machine

Buy adversarially-debated AI product ideas over x402: $0.10 pulls, $1 buyouts, USDC on Base.

Finance & CryptoPayments & trading

Responded397 ms13 / 22
IntentFence Agent Action Firewall

Fail-closed action authorization, MCP risk scanning, x402 checks, and signed receipts.

Developer ToolsCode & DevOps

Outdated check399 ms13 / 22
Psychevus email security tools

DKIM signature checks with DMARC alignment, email header analysis and payment-fraud checks.

Finance & CryptoPayments & trading

Responded409 ms13 / 22
SEC EDGAR Filings MCP

SEC EDGAR MCP: search, preview, purchase filings. x402 USDC on Polygon. xpay + Cloud Run upstream.

Finance & CryptoPayments & trading

Outdated check414 ms13 / 22
SCRIPTMASTERLABS — OmniPost

One post → native, validated posts for 14 social platforms, with x402 pay-per-call tools.

Finance & CryptoPayments & trading

Responded421 ms13 / 22
Mifori CertAgent Trust Oracle

Live AI agent trust oracle: audit synthetic IQ, latency & JSON compliance via x402 or free tokens.

Developer ToolsCode & DevOps

Responded424 ms13 / 22

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