402Sentinel

A counterparty risk gate for AI agents in the x402 economy. Call it before paying an x402 counterparty — get a 0-100 risk score and an allow / review / block decision relative to your policy, scored purely from on-chain settlement behaviour.

What it scores

• identity provenance — address age, contract/EOA provenance
• sybil / flow — real-payer diversity after removing facilitators (so facilitator-batched flow isn't mistaken for a healthy crowd, and self-wash clusters aren't hidden)
• settlement maturity — how much settlement history exists

Endpoint

• POST /api/assess — $0.01 — body { target: { payto_address }, payment_context?, policy? } → risk score + decision + confidence + coverage.

Pay per call in USDC on Base (x402, gas-free via Circle Gateway — no signup, no API key). Honest by design: thin on-chain data → low confidence → review, never a fake allow.

Algorithmic risk signal, informational only — not advice, not an endorsement, and not an accusationabout any party. Provided “as is”, no warranty; do your own due diligence and don't rely on it as your sole basis to pay or refuse. See Terms & Disclaimer.