Observed arrival · 2026-09-21
ZECX402 — A payment rail where agents pay per request
Credibility concern recorded. The source reference remains available for verification and correction.
A browser-based HTTP 402 demonstration for AI-agent payments using public deposits, shielded notes, and devnet settlement.
- For
- Developers experimenting with agent payments and privacy
- Worth noticing
- The page documents timing leakage and a small anonymity set instead of presenting privacy as solved.
Field notes
The console models a request as a sequence of quote, signature, retry, work, and settlement, exposing fields such as the recipient, fee route, nonce, and payment amount. Its shielded mode uses blind-signed notes and nullifiers, but the page says the current construction is Chaum-style RSA rather than a zk-SNARK. The displayed devnet starts with a 5.000000 USDG faucet balance and currently records no requests or settled volume.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
One card from the complete issue