PayPerScreen MCP server

Give your AI agent compliance checks. Claude, Cursor or any MCP client can screen people, companies, crypto wallets, emails and IP addresses with PayPerScreen, paying 1 to 2 cents per check in USDC over x402. No account, no API key, no subscription.

Tool	What it does	Price
screen_name	Person or company against OFAC SDN, UN, EU and UK sanctions lists (refreshed daily). Each hit: listed name, score, record ID, programmes, aliases, and a date of birth / nationality / type comparison against what you pass	$0.02
screen_wallet	Wallet against every OFAC-sanctioned address (names the party), Tether's USDT freeze list on Tron, and FBI-identified hack wallets	$0.02
check_email	Ten deterministic fraud signals (disposable domain, domain age, blocklists, typo-squats…)	$0.02
check_ip	Spamhaus ZEN and Tor exit node check (beta)	$0.01
lists_coverage	Which lists are checked, record counts, publication dates	free
sample_name_screen, sample_wallet_screen	Real results for fixed examples, to see the format	free
spending_status	What this session has spent against its cap	free

Results are possible matches for review, not legal determinations. Bad input is never charged.

Set up

You need Node.js 20+ and, for the paid tools, a wallet with a few dollars of USDC on Base (or Polygon or Arbitrum). Use a dedicated wallet for this, not your main one: the key sits in your MCP client's config.

Claude Code

claude mcp add payperscreen -e PAYPERSCREEN_PRIVATE_KEY=0xYOUR_KEY -- npx -y payperscreen-mcp

Claude Desktop (Settings → Developer → Edit config), Cursor (~/.cursor/mcp.json) and most other clients:

{
  "mcpServers": {
    "payperscreen": {
      "command": "npx",
      "args": ["-y", "payperscreen-mcp"],
      "env": {
        "PAYPERSCREEN_PRIVATE_KEY": "0xYOUR_KEY",
        "PAYPERSCREEN_MAX_SPEND": "1.00"
      }
    }
  }
}

Leave out the key to use only the free tools.

Settings

Variable	Default	Purpose
PAYPERSCREEN_PRIVATE_KEY	none	Wallet that pays. Without it, paid tools explain how to add one
PAYPERSCREEN_MAX_SPEND	1.00	Spending cap in USD per session; checked before any payment is signed
PAYPERSCREEN_NETWORK	base	base, polygon or arbitrum: where your wallet holds USDC
PAYPERSCREEN_API_URL	https://api.payperscreen.com	API to call

No ETH or gas needed: you only sign a USDC authorization, and Coinbase's facilitator settles it.

How it works

Each paid tool calls the PayPerScreen API. The API answers 402 Payment Required with the price; the server signs a USDC payment from your wallet and retries; the result comes back with a receipt (amount, transaction, session total). See the API docs and methodology.

Develop

npm install
PAYPERSCREEN_API_URL=http://localhost:4025 PAYPERSCREEN_PRIVATE_KEY=0x... npm run test:e2e

MIT licence.