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

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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
io.github.normancomics/phantomoperator

Authorized privacy and exposure checks for people and agents; USDC on Base via x402.

Finance & CryptoPayments & trading

Responded341 ms13 / 22
SafeRoute

Noncustodial Base x402 payment control and seller settlement recovery

Finance & CryptoPayments & trading

Outdated check342 ms13 / 22
Simples Nacional

Looks up a company's status in the Simples Nacional tax regime from the CNPJ, including opt-in and b

Developer ToolsCode & DevOps

Outdated check343 ms13 / 22
Stripe

Payments and billing on Stripe with the full official REST API (api.stripe.com), covers the entire d

Finance & CryptoPayments & trading

Outdated check344 ms13 / 22
Restituição IRPF

Looks up an individual's income tax refund status from the CPF, date of birth, and tax year. Platfor

Developer ToolsPayments & trading

Outdated check353 ms13 / 22
io.github.jdhart81/taxcredit-engine

Auditable US clean-energy tax-credit scenarios for 45Q, 45V, 45Y, 48E, and 45X.

Developer ToolsCode & DevOps

Outdated check354 ms13 / 22
x402 Scraper API

Paid web extraction: markdown, structured JSON, market-rules and page-change checks via x402.

Developer ToolsBrowser & web scraping

Outdated check355 ms13 / 22
NFe Inutilizações

Looks up the electronic invoice numbering voidings for a company from the CNPJ and year. Platform-ho

Finance & CryptoPayments & trading

Outdated check358 ms13 / 22
x402 Merchant Check

Pre-payment merchant trust checks for x402 agents on Base and Solana.

Finance & CryptoPayments & trading

Responded359 ms13 / 22
AGORA Omega

Pay-per-call checks for AI agents: sanctions, MiCA, French KYB, AI Act. USDC via x402.

Finance & CryptoPayments & trading

Responded359 ms13 / 22
Advan: Solana trading tools

Non-custodial Solana trading MCP: Jupiter quotes/swaps, token risk, portfolio. x402-paid.

Finance & CryptoPayments & trading

Outdated check359 ms13 / 22
PagSeguro

PagSeguro / PagBank payments, orders, charges (get, cancel, refund), checkouts and public key via th

Finance & CryptoPayments & trading

Outdated check362 ms13 / 22
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

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