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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3365 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
Sivut SEC Crypto Filing Radar

SEC EDGAR crypto filing radar MCP with x402-paid Base USDC data URLs.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
SLB Florida Business Intelligence

312K+ FL commercial parcels, 6,400+ verified listings, AI visibility reports, x402 micropayments

Data & AnalyticsCode & DevOps

Outdated checkNot measured4 / 22
Slovakia Payments (Stripe — cards / Apple Pay)

Slovakia payments for AI agents — cards / Apple Pay via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Slovenia Payments (Stripe — cards / Apple Pay)

Slovenia payments for AI agents — cards / Apple Pay via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Slug Generator API

URL-friendly slugs from text — transliteration, custom separators. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
SMARD Energy Prices (x402)

Paywalled SMARD day-ahead electricity prices (DE-LU, 15‑minute resolution) via x402 on Base mainnet.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
SMS Validator API

Validate SMS-capable phone numbers — mobile vs landline, E.164 format. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Social Profile Enrichment API

Social media profile lookup for GitHub, Twitter/X, LinkedIn, YouTube. x402.

Marketing & SalesCode & DevOps

Outdated checkNot measured4 / 22
Solana Delta

Live cached Solana decisions and delta feeds purchasable by AI agents through x402.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Solana Pool Liquidity Scanner API

Solana DEX pool liquidity depth — TVL, slippage, volume, Raydium/Orca/Meteora. x402.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Solana Priority Fee Estimator API

Solana priority fees at 6 levels, cost in SOL/USD, congestion. x402.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Solana Token Launch Scanner API

New Solana token launches — pump.fun, Raydium, PumpSwap. Price, liquidity, volume. x402.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
South Africa Payments (Paystack — cards / EFT)

South Africa payments for AI agents — cards / EFT via Paystack. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Spain Payments (Stripe — cards / Apple Pay)

Spain payments for AI agents — cards / Apple Pay via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
SparkForge — 20+ Utility APIs with x402 Micropayments

20+ pay-per-use APIs: image gen, crypto data, email verify, SSL check, web scraping, and more.

Finance & CryptoBrowser & web scraping

Outdated checkNot measured4 / 22
SSL Checker API

SSL certificate check — validity, expiry, issuer, chain, grade. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Stock Price API

Real-time stock quotes — price, change, volume, market cap. x402 micropayment.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Swarm0x

Run before you buy on Robinhood Chain: a simulated buy and sell, plus trades your own wallet signs.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22
Sweden Payments (Stripe — Klarna)

Sweden payments for AI agents — Klarna via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Switzerland Payments (Stripe — TWINT)

Switzerland payments for AI agents — TWINT via Stripe. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Taiwan Laws + U.S. Company Financials (x402)

Taiwan laws and U.S. XBRL financials (paid, x402) plus AI City: free agent registry, tasks, votes.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22
Taiwan Payments & E-Invoice (ECPay 綠界 / NewebPay 藍新)

Taiwan payments (ECPay 綠界 + NewebPay 藍新) & e-invoices for AI agents. Stateless, never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
TalkToMyAgent

Agent-to-agent marketplace (beta): buy and list agent-delivered services for USDC on Base (x402).

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Tanzania Payments (Flutterwave — M-Pesa / Tigo Pesa)

Tanzania payments for AI agents — M-Pesa / Tigo Pesa via Flutterwave. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22

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