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.

Connect your agent

4113 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
x402 Market Intelligence + Russian Web Access

Check x402 endpoints before paying: liveness, price history, farm detection. Plus RU web access.

Finance & CryptoPayments & trading

Responded88 ms12 / 22
MoneyTools payment-safety suite

Call before paying any x402 seller: 402/OFAC precheck, verify, approval, ledger

Finance & CryptoPayments & trading

Responded89 ms12 / 22
Agent Checkout

AI shopping gateway for product search, inventory, carts, and merchant-hosted checkout.

Finance & CryptoPayments & trading

Responded93 ms12 / 22
Mat Web & Data Toolkit (x402, Cloudflare)

x402 web/data toolkit: tools, US$5 lead pack, free flapjax_check, paid Nostr relay

Finance & CryptoPayments & trading

Responded95 ms12 / 22
HOBO Works Agent Market

Fixed-price HOBO agent products, discovery feed, and direct checkout. Owner-only; no seller splits.

Finance & CryptoPayments & trading

Responded96 ms12 / 22
dev.workers.sebastiaan-ba3.mcpgateway/tools

Doormat Capital's paid x402 safety tools (token scan, HTTP security headers) for AI agents.

Finance & CryptoPayments & trading

Responded98 ms12 / 22
dev.workers.sebastiaan-ba3.x402lint/tools

Lints whether a paid API's 402 response speaks the x402 protocol correctly.

Finance & CryptoPayments & trading

Responded100 ms12 / 22
Dozo

PDF invoices (VAT by rate, EN/FR) and links to free in-browser PDF tools on dozokit.com.

Finance & CryptoPayments & trading

Responded101 ms12 / 22
Outdated check101 ms12 / 22
GeekVault

51 tools para agentes de IA, pagadas por llamada via x402 (USDC/Base). Sin cuentas ni keys.

Finance & CryptoPayments & trading

Responded102 ms12 / 22
io.github.Capataina/agentfulfyl

Research storefront for AI agents: fixed GBP prices, evidence ledgers, citation-refund guarantee.

E-commercePayments & trading

Responded105 ms12 / 22
markets.equitycapital/equitycapital-markets

Open ledger of U.S. share offerings from SEC EDGAR since 2002: IPOs, SPACs, shelves, withdrawals.

Finance & CryptoPayments & trading

Responded106 ms12 / 22
x402 Cartographer

Ranks x402 endpoints and Apify actors; real yield of Base LP pools. Pay per call via x402.

Finance & CryptoPayments & trading

Responded108 ms12 / 22
CryptoPulse Data API

Pay-per-call crypto market intelligence for AI agents. USDC on Base via x402.

Finance & CryptoPayments & trading

Responded109 ms12 / 22
The 402 Wall

Buy and paint 10x10 pixel blocks on a billboard only AI agents can buy: $1.00 USDC via x402 on Base.

Finance & CryptoPayments & trading

Responded114 ms12 / 22
satledger timestamp receipt

RFC 3161 timestamps with no account, and a signed agent-ledger workspace. Paid per call over x402.

Finance & CryptoPayments & trading

Responded114 ms12 / 22
Web Intel

8 pay-per-call web intel tools over MCP. Free discovery, calls settle in USDC on Base (x402).

Finance & CryptoPayments & trading

Outdated check114 ms12 / 22
io.github.nousulabs-debug/pohjola-api

Agent-native API for Finnish public company data via YTJ. Pay-per-call $0.01 USDC over x402.

Finance & CryptoPayments & trading

Outdated check117 ms12 / 22
Lenius

Order from local Danish shops: products, pickup times, card payment and AltID age verification.

Finance & CryptoPayments & trading

Responded119 ms12 / 22
io.github.ajwentcrazy/lazareus

S3 storage and Solana/Base/Ethereum health checks for AI agents, paid per call via x402.

Finance & CryptoPayments & trading

Responded120 ms12 / 22
NIAR

Which nearby physical shops in Spain have a product: stores, stock, prices, hours.

Finance & CryptoPayments & trading

Responded120 ms12 / 22
RCQ Data Oracle

Signed BTC and macro market intelligence for autonomous research, risk, and trading agents.

Finance & CryptoPayments & trading

Responded122 ms12 / 22
dev.workers.sebastiaan-ba3.signals/tools

Lighter funding/volume snapshot and multi-chain wallet balance checks for AI agents.

Finance & CryptoPayments & trading

Responded125 ms12 / 22
Compliance Tools

Pay-per-call compliance lead scanners with free MCP discovery and x402 payments.

Finance & CryptoPayments & trading

Outdated check125 ms12 / 22

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