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

3337 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
Agent Lead Generation

Leads from agents: hops attributed with a per-hop utm_id from discovery to trial to invoice.

Marketing & SalesPayments & trading

Outdated check99 ms13 / 22
Bitcoin PSBT, Address & Descriptor Verifier + WorkSats L402 MCP

Verify Bitcoin PSBTs, addresses, and BIP380 descriptors; earn or spend WorkSats L402 bearer credits.

Finance & CryptoPayments & trading

Responded100 ms13 / 22
CleanPage

Turn any URL into clean, structured, agent-ready content. $0.02/call via x402 on Base.

Developer ToolsCode & DevOps

Responded103 ms13 / 22
Ens

ENS (Ethereum Name Service) MCP.

Finance & CryptoPayments & trading

Outdated check115 ms13 / 22
Open Claw x402 Tools

Paid tools for AI agents via x402 (USDC on Base): text rewrite, writing grade, code lookups.

Finance & CryptoPayments & trading

Responded131 ms13 / 22
Outdated check132 ms13 / 22
Outdated check161 ms13 / 22
alalanet — check before your agent installs, connects or pays

Check packages, MCP servers and x402 endpoints before agents install, connect or pay. Signed.

Finance & CryptoPayments & trading

Outdated check226 ms13 / 22
HSH Data-on-Demand

Made-to-order data for AI agents: company intel, B2B contacts, scraping. Pay per call via x402.

Developer ToolsCode & DevOps

Outdated check246 ms13 / 22
APEX EVM Reads

Agent reads, ETH/Base/Arc/BNB: prices, FX, sanctions, payment checks, balances, NFTs, gas, ENS.

Finance & CryptoPayments & trading

Responded296 ms13 / 22
Crypto Perp Funding Arbitrage Radar MCP

Hyperliquid, Binance & Bybit perpetual funding rate arbitrage & DeFi APY yield scanner MCP.

Finance & CryptoPayments & trading

Responded438 ms13 / 22
Apollo.io B2B Person Enrichment & Verified Email Finder (x402)

Apollo.io B2B Person Enrichment & Verified Work Email Finder via x402 on Base ($0.03, free on miss).

Developer ToolsCommunication & messaging

Responded443 ms13 / 22
Base L2 Transaction Simulator & Wallet Drain Guard

Pre-execution Base eth_call/eth_estimateGas simulator & ERC-20 approve drain detector.

Finance & CryptoPayments & trading

Responded524 ms13 / 22
cc.accrue/mcp

Stablecoin Yield Index (SYX) and live USDC vault APYs across Ethereum, Base, Arbitrum.

Finance & CryptoPayments & trading

Responded542 ms13 / 22
io.github.Algiras/agentum-entity-resolver

Company registry, VAT, sanctions, vendor KYB, IBAN and wallet checks; pay per call by x402 or card.

Finance & CryptoPayments & trading

Outdated check563 ms13 / 22
TrustBench

x402 provider rankings + Ed25519-signed payment receipts + signature verification (3 tools).

Finance & CryptoPayments & trading

Responded627 ms13 / 22
JarvisClaw — AI Gateway & API Marketplace

320 AI models + 2,720 pay-per-call APIs. x402 USDC on Base or Solana, no API key.

Finance & CryptoPayments & trading

Outdated check764 ms13 / 22
NetGrant — Canadian funding

Search 1,300+ live Canadian funding opportunities — grants, tax credits, accelerators, and loans.

Finance & CryptoData access / search

Outdated check801 ms13 / 22
Carry Intel — Hyperliquid funding screens

Read-only Hyperliquid funding screens via x402 v2/Solana; not positions or returns.

Finance & CryptoPayments & trading

Responded877 ms13 / 22
Attest

Scan agent payment endpoints (x402, AP2, L402, MPP, 402) for a trust grade A-F before paying.

Finance & CryptoPayments & trading

Outdated check1080 ms13 / 22
com.cryptowhaleinsights/whale-insights

Free read-only crypto whale-tracking & market-data MCP tools across 14 chains. No auth.

Finance & CryptoData access / search

Responded1208 ms13 / 22
BitCLI

Real-time crypto futures order flow, BCT-30 matrices, and HFT alerts across 1,650+ contracts.

Finance & CryptoCode & DevOps

Responded1289 ms13 / 22
io.github.konstantinbozukov/pathmint

Before you pay an x402 URL, ping it live or dead. One cent, USDC on Base.

Finance & CryptoPayments & trading

Responded1342 ms13 / 22
Stock Bloc

SEC filing jobs, 13F holdings, market data, quant scores for agents. x402 USDC pay-per-call on Base.

Finance & CryptoData access / search

Outdated check1444 ms13 / 22

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