probe402-check runs on your own machine — the client starts it, so there is no endpoint to ping. 43 installs a week from npm. Last commit 1 Oct 2026.
Ask probe402's public record about an x402 or MPP endpoint before an agent pays it.
Today is the operative word: we check probe402-check 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 probe402-check -- npx -y probe402-check
{
"mcpServers": {
"probe402-check": {
"args": [
"-y",
"probe402-check"
],
"command": "npx"
}
}
}
[mcp_servers.probe402-check]
command = "npx"
args = ["-y", "probe402-check"]
{
"mcpServers": {
"probe402-check": {
"args": [
"-y",
"probe402-check"
],
"command": "npx"
}
}
}
{
"mcpServers": {
"probe402-check": {
"args": [
"-y",
"probe402-check"
],
"command": "npx"
}
}
}
Check an x402 endpoint before your agent pays it: avoid / caution / ok, proven on-chain.
Check an x402 endpoint before your agent pays: pay, skip or recheck. Plus a verified x402 catalog.
Verify x402 payment endpoints before an AI agent pays: scam scan, on-chain checks, trust scores.
Check an x402 endpoint before your agent pays it: challenge validity and on-chain payer evidence.
Wash-traffic risk checks for Algorand x402 endpoints before your agent trusts or pays them.
Check x402 endpoints before your agent pays: payTo, paid test purchases, payee and buyer reports
Check stablecoin and x402 payments before an AI agent pays: approve, hold or reject.
Check an x402 endpoint before you pay it: verdict, risk score and what is wrong. $0.005 in USDC.
Answers built from our own checks of this server.