Tag: crypto

All the articles with the tag "crypto".

• A Paywall for AI Agents, Built on a Forgotten HTTP Code

  Updated:May 30, 2026 |  at 09:37 AM

  HTTP 402 "Payment Required" was reserved in 1997 and never shipped. I used it to build a paywall that AI agents can pay through on their own, with on-chain settlement, non-extractable keys, and verification that runs on an edge function with no database. Here is how the handshake works and the decisions that made it safe.

• Proof of Mandate, or How to Hijack an Agent and Steal Nothing

  Updated:May 9, 2026 |  at 04:52 PM

  The industry's reflex on agent safety is "make the model safer." I think that is the wrong fight. Assume the model will be fully compromised, and make the theft impossible anyway, by turning the agent's permissions into a keyring it cannot exceed rather than a rulebook it is asked to follow. Here is the design, and a demo where a jailbroken agent tries to drain a treasury and fails at signing time.

• How I scaled a trading engine to 100K TPS?

  Updated:Jul 23, 2020 |  at 03:22 PM

  How Migrating to Go-Lang Transformed a Cryptocurrency Exchange's Matching Engine, Achieving High Concurrency, Low Latency, and Optimal CPU Utilization for Enhanced Trade Speeds