X402 Trust Scores

What is X402 Trust Scores?

X402 Trust Scores is an MCP server that queries a continuously running service (https://x402.fuchss.app/) which probes every publicly listed x402 endpoint and scores each one from 0–100 (graded A–F) using real signals. It provides auditable, deterministic trust scores that catch issues that uptime-only checkers and raw explorers miss.

How to use X402 Trust Scores?

Configure the server to point to the service endpoint. The free tier returns ecosystem stats, a top-25 leaderboard, and a preview of the highest, lowest, and average scored endpoints. For per-endpoint trust scores and raw observation history, a Base USDC wallet must be configured to auto-pay per call over x402.

Key features of X402 Trust Scores

• Scores based on uptime, compliance, latency, age, price stability, and on-chain settlement volume.
• Every score is deterministic and fully auditable.
• Includes a live probe at purchase time so "up" means right now.
• Provides machine-readable flags and a clear verdict (proceed / caution / avoid).
• Free tier offers ecosystem stats, top-25 leaderboard, and preview examples.

Use cases of X402 Trust Scores

• Evaluate the trustworthiness of an x402 endpoint before using it.
• Detect dead endpoints still showing cumulative transaction counts.
• Identify endpoints with shared payTo addresses that obscure true settlement volume.
• Spot malformed resource URLs or recently-changed payTo addresses.

FAQ from X402 Trust Scores

What signals does the trust score use?

The score combines 30-day uptime, 402-envelope spec compliance, latency, observed age, advertised-price stability, and actual on-chain USDC settlement volume to the endpoint’s payTo address.

Is there a free tier?

Yes. The free tier provides ecosystem stats, a top-25 trustworthy-endpoint leaderboard, and a preview example showing the highest, lowest, and average scored endpoints with all stats.

How do I get per-endpoint scores?

Per-endpoint trust scores and raw observation history require a paid (pay-per-call over x402) plan, which auto-pays if a Base USDC wallet is configured.

Where can I see the full list of endpoints?

All endpoints are also listed on x402scan.com. Search for "x402.fuchss.app" on that site.

What does the live probe do?

The service performs a live probe at purchase time so that an "up" status means the endpoint is actually reachable at that moment, not just historically.