Preliminary research
When HTTP 402 Meets the Blockchain: Risks on Emerging x402 Payments
AI-collected research leads through 22 September 2026, including targeted additions between broader sweeps. Unranked, incomplete, not community-vetted, and subject to change.
x402 extends HTTP 402 with a payment negotiation flow and delegates proof verification and on-chain settlement to third-party facilitators, so one facilitator becomes shared payment infrastructure for many independent merchants and one flaw reaches all of them. Eight authorization and execution-safety rules are derived and checked against deployments already carrying real mainnet volume.
Record
- Researcher
- Qinying Wang, Yong Yang, Yuan Chen, Shouling Ji and Mathias Payer
- Published by
- USENIX
- Topic
- HTTP
In the archive
Related sources
- [2607.19545] When HTTP 402 Meets the Blockchain: Risks on Emerging x402 Payments
- X402SCOPE Repository
Tags
This page is the archive's own catalogue record. The research is the work of Qinying Wang, Yong Yang, Yuan Chen, Shouling Ji and Mathias Payer, first published at the original source. Preserved copies are kept so the citation survives its host; this one was last captured on .