X402 Paid Checks runs on your own machine — the client starts it, so there is no endpoint to ping.
Domain, email, vendor and ransomware checks paid per call in USDC via x402 from your wallet.
Today is the operative word: we check X402 Paid Checks every 15 minutes and re-read its code on every release. Watch it and you find out the day that stops being true.
This server runs on your own machine — install it with the package manager and the client starts it for you. Package name taken from the official registry entry.
claude mcp add x402-paid-checks -- npx -y x402-paid-checks-mcp
{
"mcpServers": {
"x402-paid-checks": {
"command": "npx",
"args": [
"-y",
"x402-paid-checks-mcp"
]
}
}
}
[mcp_servers.x402-paid-checks]
command = "npx"
args = ["-y", "x402-paid-checks-mcp"]
{
"mcpServers": {
"x402-paid-checks": {
"command": "npx",
"args": [
"-y",
"x402-paid-checks-mcp"
]
}
}
}
{
"servers": {
"x402-paid-checks": {
"type": "stdio",
"command": "npx",
"args": [
"-y",
"x402-paid-checks-mcp"
]
}
}
}
Optional settings from the registry entry, left out of the block above:
X402_PRIVATE_KEY (Your own EVM wallet private key used to pay per call. Optional; without it tools return the price only), X402_MAX_USD_PER_CALL (Refuse any call priced above this USD amount (default 0.10)).
Sanctions, crypto wallet, email and IP screening for agents. Pay per check in USDC via x402.
Pay-per-call tools for agents: web page to Markdown, tech stack, email domain check (x402 USDC)
Check emails before you send, and get a $1 SPF/DKIM/DMARC fix plan for your domain. Pay per call.
Checks if an email/domain is disposable (temp-mail). x402-metered per call.
Pay-per-call x402 agent tools (USDC): web reader, token/wallet/email/site checks, screenshots, PDFs.
Audit SPF, DKIM, DMARC, MX, BIMI, MTA-STS for a domain; score + grade. $0.003 USDC/call via x402.
Agent infra: email, phone, social, domains, VPS, wallets. Paid per-action via x402, no API key.
B2B company research and work-email lookup for AI agents. Pay per call in USDC on Base via x402.
Answers built from our own checks of this server.