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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4754 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
Sardine: Kalshi crypto settlement history

How often Kalshi BTC/ETH/XRP contracts settled YES, counted not forecast, with a public record

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
SatoshiAPI — Bitcoin Intelligence via Lightning

Bitcoin intelligence API. Pay per call via L402 Lightning (10-200 sats). No accounts needed.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Saudi Arabia Payments (Tap Payments — mada / STC Pay)

Saudi Arabia payments for AI agents — mada / STC Pay via Tap Payments. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Saudi Invoices (ZATCA Fatoora Phase 2 reporting & clearance)

Saudi ZATCA Fatoora Phase 2: AI agents report B2C and clear B2B tax invoices, stateless.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Saylor Innovations: pay-per-call data

271 x402 agent APIs: research, law, medicine, science, finance, public data, security and crypto.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
ScrapeMole Arxiv

Pay-per-call x402 arXiv paper search, metadata, abstracts, and category listings.

Finance & CryptoKnowledge & memory

Outdated checkNot measured4 / 22
ScrapeMole Companies

Pay-per-call x402 SEC EDGAR data: company search, profiles, XBRL financials, filings.

Finance & CryptoData access / search

Outdated checkNot measured4 / 22
ScrapeMole Onchain

Pay-per-call x402 Base/Ethereum prices, DEX, ENS, gas, tokens, holders, balances, txs.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
ScrapeMole Quotes

Pay-per-call x402 stock, ETF, index, FX and crypto quotes, OHLCV history, ticker and coin search.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
ScrapeMole Reader

Pay-per-call x402 web reading: page to Markdown, link previews, RSS feeds, links, sitemaps.

Finance & CryptoFile & docs

Outdated checkNot measured4 / 22
ScrapeMole Search

Pay-per-call x402 web search results, news search and search autocomplete suggestions for agents.

Finance & CryptoData access / search

Outdated checkNot measured4 / 22
ScrapeMole Social

Pay-per-call x402 Telegram channels, Mastodon tags, Bluesky, Hacker News, Lobsters data.

Finance & CryptoCommunication & messaging

Outdated checkNot measured4 / 22
ScrapeMole Wiki

Pay-per-call x402 Wikipedia summaries/search and Wikidata facts, with CC BY-SA attribution.

Finance & CryptoKnowledge & memory

Outdated checkNot measured4 / 22
Screenshot & PDF Capture API

Capture screenshots (PNG/JPEG/WebP) and generate PDFs from any URL. x402 payments.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
SCRIPTMASTERLABS — Robinhood RWA Intelligence

Robinhood Chain stock-token + prediction-market intelligence MCP. Read-only, evidence-first.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
SEC EDGAR Fundamentals

Normalized SEC EDGAR fundamentals. 3 of 6 tools free; the rest $0.04-$0.10 per call in USDC.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Senegal Payments (Flutterwave — Orange Money / Wave)

Senegal payments for AI agents — Orange Money / Wave via Flutterwave. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Sentimatix

Real-time NSE/BSE stock sentiment, news NLP, technical analysis & RAG search via MCP.

Finance & CryptoCode & DevOps

Outdated checkNot measured4 / 22
Sentiment Analyzer API

Analyze text sentiment, emotions, confidence scores, and key phrases. x402 USDC.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Serbia Invoices (SEF eFaktura national API)

Serbia SEF eFaktura invoices for AI agents: build UBL 2.1 SRB-CIUS, upload to SEF, query, cancel.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Singapore Payments (HitPay — PayNow QR)

Singapore payments for AI agents — PayNow QR via HitPay. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
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
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

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