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

4745 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
Taskmarket Onchain API

On-chain receipts, balances, tx status and address activity, pay-per-call via x402 USDC on Base.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
textkit (paid)

Text and Unicode utilities for agents: homoglyphs, scripts, slugify, entropy, dates. Paid via x402.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Token risk x402

Pre-trade token safety checks for AI agents on Solana and Base. x402 USDC per call, no key.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Tollbooth Swap API

Token swaps and honeypot/rug checks for AI agents on 8 chains, paid per-call in USDC via x402.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
Unit & Currency Converter

60+ units, live FX, timezones, and date arithmetic for AI agents.

Finance & CryptoCode & DevOps

Outdated checkNot measured5 / 22
UNLAV CSV Reconcile

Compare CSV tables by key; report changes and ambiguous rows. 0.05 USDC on Base via x402.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
UNLAV Supplier Quote Compare

Compare complete supplier quotes with exact totals and shipping. 0.05 USDC on Base via x402.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Utilia Solana Transaction Evidence

Solana transaction diagnosis, simulation, token-risk evidence, and priority fees via x402 USDC.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
UXUS Agent Services: wallet lookup, entity labels, caller ID

Free wallet lookup, ENS, labels, caller ID. Paid x402: search, scrape, XRP yield and lending grades

Finance & CryptoData access / search

Outdated checkNot measured5 / 22
VaultRubric

Sourced, scored comparisons of crypto exchanges, wallets, savings accounts and brokerages.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Vayancy TravelOS

Mediterranean luxury villa booking rail with real-time PMS inventory & direct Stripe holds.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
Wallet Doctor

Solana wallet forensics SDK, x402 pay-per-call, AI agents.

Finance & CryptoPayments & trading

UnreachableNot measured5 / 22
Web3 DNS (CNSLookup)

Read-only lookup of verified crypto wallet addresses for domains, .cns and ENS names.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
Web3 Signals

AI crypto buy/sell signals for 20 assets: 6 data dimensions fused into 0-100 scores. x402 + MCP.

Finance & CryptoCode & DevOps

Outdated checkNot measured5 / 22
WhaleScope MCP

Binance Futures market intelligence: funding, OI, order book, klines, cross-exchange comparison.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
x402 Agent Tollbooth

On-chain DeFi smart contract auditor, arbitrage scanner, and agent tollbooth via x402 on Base.

Finance & CryptoCode & DevOps

Outdated checkNot measured5 / 22
x402 MCP Starter

Free self-hosted x402 USDC billing for Cloudflare MCP servers, with a Base Sepolia test endpoint.

Finance & CryptoPayments & trading

Outdated checkNot measured5 / 22
ai.bobwork/emailwarmup

Warm up mailboxes, check the ready-for-outbound gate, run cold email and get checkout links.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22Not checked yet
ai.crayonz/mcp

Design custom apparel from chat: AI art on tees and hoodies, then a checkout link to buy.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22
ai.marketintell/marketintell

AI analyst desk for stocks, options & crypto with sourced trade setups and a public accuracy record.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22Not checked yet
co.churnkey/churnkey

Read and manage Churnkey cancel flows, retention metrics, and payment recovery

Finance & CryptoPayments & trading

Requires authNot measured5 / 22
com.accountingqb/accountingqb

QuickBooks Online for Claude: reports, bookkeeping cleanup, and US & Canadian tax prep.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22
com.bykaranteli/mcp

Crypto derivatives data: funding, OI, liquidations, options, ETF flows. Free account key required.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22Not checked yet
com.jupitersignup/jupitersignup

List, read, create, and edit JupiterSignup sign-up and payment forms. API key required.

Finance & CryptoPayments & trading

Requires authNot measured5 / 22

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