Observed arrival · 2026-09-29
x402check: a pre-payment risk check for agents and wallets
A developer tool that checks payment counterparties and transactions before an agent or wallet signs, then returns a signed risk attestation.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Developers building x402 payment flows for agents or wallets
- Worth noticing
- The page says caller-supplied screening claims are recorded as assertions and cannot lower the score.
Field notes
The described checks combine external lists with transaction-level and code-pattern analysis; the page says token, NFT, and proxy code are not fingerprinted. It also distinguishes caller-provided screening or authorization claims from evidence computed by the provider: those claims are recorded as assertions and cannot reduce the score. A sample attestation identifies its algorithm and key ID and points to a public JWKS for verification.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
$PaidCommerce or pricing visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue