MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

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

3366 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
JSON Validator API

JSON syntax validation, JSON Schema checking, structure stats. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Jupiter Solana Swap Quote API

Solana swap quotes via Jupiter — best route, price impact, priority fees, USD pricing. x402.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
JWT Decoder API

Decode JWT tokens — inspect header, payload, claims, expiry. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Kazakhstan Payments (Freedom Pay — cards (Freedom Pay))

Kazakhstan payments for AI agents — cards (Freedom Pay) via Freedom Pay. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22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

Kenya payments for AI agents — M-Pesa via Flutterwave. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Keyword Research API

SEO keyword research with Google Suggest, intent scoring, long-tail discovery. x402.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
KHOTEM

Paid API bazaar for agents: seals, audits, wallet intel, codec ops. x402.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22
Korea Invoices (POPBiLL 전자세금계산서 issue, query & NTS transmit)

Korea POPBiLL e-tax-invoice: AI agents issue, query & transmit e-invoices, stateless BYO.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Korea Payments (Toss Payments — cards / KakaoPay·NaverPay / virtual accounts)

Korea payments for AI agents — card, KakaoPay/NaverPay, 가상계좌 via Toss Payments. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
KTA-Oracle

Live KTA rates, market data, payment rails, AML/VAT compliance, SDK snippets. 16 tools.

Finance & CryptoData access / search

Outdated checkNot measured4 / 22
Kuwait Payments (Tap Payments — KNET)

Kuwait payments for AI agents — KNET via Tap Payments. Never holds funds.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Landing en 24h

Argentina data tools: dolar blue/MEP/CCL, INDEC inflation, feriados, CUIT/CBU, FX; x402 pay-per-call

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22
Language Detector API

Detect language from text via trigram analysis. 30+ languages, script detection. x402.

Developer ToolsCode & DevOps

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

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

Finance & CryptoPayments & trading

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

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

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Live bitcoin bot logbook

Weekly results of a live BTC-EUR bot, grid-bot simulation and bitcoin drawdowns on real prices.

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Lorem Ipsum Generator API

Generate placeholder text — paragraphs, sentences, words. x402 micropayment.

Developer ToolsCode & DevOps

Outdated checkNot measured4 / 22
Lunium — Brazilian PIX and stablecoin payments

Accept Pix in Brazil and settle in USDT/USDC; pay Pix with crypto; verify a Pix with no API key.

Finance & CryptoPayments & trading

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

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

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Malaysia Payments (Billplz — FPX / DuitNow QR / cards)

Malaysia payments for AI agents — FPX banking, DuitNow QR, cards via Billplz. Never holds funds.

Finance & CryptoPayments & trading

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

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

Finance & CryptoPayments & trading

Outdated checkNot measured4 / 22
Markdown Renderer API

Render markdown to styled HTML with light/dark/github themes. x402 micropayment.

Developer ToolsFile & docs

Outdated checkNot measured4 / 22
Markdown to HTML API

Convert markdown to clean HTML with headings, lists, code blocks. x402 micropayment.

Developer ToolsFile & docs

Outdated checkNot measured4 / 22
Mat Web & Data Toolkit (x402)

28 pay-per-call web/data tools: RDAP, SSL, DNS, SEO, FX, crypto, more. 0.01 USDC each via x402.

Finance & CryptoPayments & trading

UnreachableNot measured4 / 22

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