5 hours ago
x402-trust gives AI agents a "check before you pay" layer for the x402 ecosystem.
This MCP queries a service (https://x402.fuchss.app/) that continuously probes every publicly listed x402 endpoint and scores each one (0-100, graded A-F) from real signals:
> 30-day uptime
> 402-envelope spec compliance
> latency
> observed age
> advertised-price stability
> actual on-chain USDC settlement volume to the endpoint's payTo address
Every score is deterministic and auditable. Full component breakdown, machine-readable flags, and a clear verdict (proceed / caution / avoid), with a live probe at purchase time so "up" means up right now.
It catches what uptime-only checkers and raw explorers miss:
> dead endpoints still showing cumulative transaction counts
> settlement volume that can't be attributed to one endpoint because the payTo is shared
> malformed resource URLs
> recently-changed payTo addresses
Free tier:
> ecosystem stats
> a top-25 trustworthy-endpoint leaderboard
> a preview trust score (fewer details)
Paid (pay-per-call over x402, auto-pays if a Base USDC wallet is configured):
> per-endpoint trust score
> raw observation history
All endpoints are also listed on x402scan. Go to https://www.x402scan.com/ and search for "x402.fuchss.app".
Let your agent know before he pays.
Server Config
{
"mcpServers": {
"x402-trust": {
"command": "npx",
"args": [
"-y",
"x402-trust-mcp"
],
"env": {
"X402_TRUST_API_BASE": "https://x402.fuchss.app",
"X402_PRIVATE_KEY": "0xYOUR_BASE_WALLET_KEY",
"X402_MAX_USD": "0.05",
"X402_MAX_TOTAL_USD": "1.00",
"X402_MAX_CALLS": "1000",
"X402_TIMEOUT_MS": "20000"
}
}
}
}