MCP 服务器

CorteX402

Pay-per-call x402 data products on Base mainnet — sanctions screening, aviation weather, mortgage rates, US property dossier, title chain, wallet balance, and agent session auth. Every call settles in USDC with an on-chain receipt, no accounts or API keys.

README

cortex402-mcp

MCP server for CorteX402 — exposes pay-per-call x402 data products as Claude-callable tools. Settles in USDC on Base mainnet.

Tools

Tool	Cost	Description
`sanctions_screen`	$0.50 USDC	OFAC/UN/EU/UK + 100+ sanctions lists. Name + DOB + country in, normalized match score with provenance out. Source: OpenSanctions.
`aviation_weather`	$0.10 USDC	METAR + TAF + 24h forecast for ICAO airports (batch up to 10). Sources: NOAA AviationWeather + Open-Meteo.
`property_dossier`	$2.00 USDC	US address → 50-field property + demographics + risk dossier. Currently in development (returns clean status, no payment taken).

Install — Claude Desktop

Add to ~/Library/Application Support/Claude/claude_desktop_config.json:

{
  "mcpServers": {
    "cortex402": {
      "command": "npx",
      "args": ["-y", "cortex402-mcp"],
      "env": {
        "CORTEX402_WALLET_PRIVATE_KEY": "0x..."
      }
    }
  }
}

Restart Claude Desktop. The three CorteX402 tools become available to Claude.

Install — Claude Code

claude mcp add cortex402 -- npx -y cortex402-mcp

Then set the env var in your shell or in the config file produced.

Wallet setup

You need a wallet with USDC on Base mainnet (NOT Base Sepolia, NOT Ethereum mainnet). The wallet's private key goes in the CORTEX402_WALLET_PRIVATE_KEY env var.

Easiest funding path:

Coinbase Wallet (self-custody app, not the exchange) → Buy crypto → USDC on Base network → debit card
~$5 USDC gives ~50 sanctions checks or ~50 aviation queries
Export the private key from Coinbase Wallet (Settings → Show recovery phrase → derive key)

Or use any existing Base mainnet wallet that you control the private key for.

What happens per call

Claude decides one of the CorteX402 tools is relevant to your question
The MCP server constructs the request and calls the corresponding cortex402.vercel.app endpoint
The endpoint returns HTTP 402 with payment requirements
The MCP server signs an EIP-3009 USDC transfer authorization with your wallet
Coinbase's CDP-authenticated facilitator settles the transfer on Base mainnet
The endpoint returns the data + an on-chain transaction hash receipt
Claude formats and returns the data to you

Total time per call: ~3–4 seconds end-to-end. No accounts, no API keys, no monthly minimums.

Security

Your private key is stored in your MCP client config and read via env var by this MCP server. The server never logs or transmits it.
All payments happen wallet-to-wallet on Base mainnet. No platform takes a cut.
Each successful call returns a Base mainnet transaction hash, permanently auditable.