@article{hardeningx402piisafeagenticpaymentsviapr,
  title = {Hardening x402: PII-Safe Agentic Payments via Pre-Execution Metadata Filtering},
  author = {Vladimir Stantchev},
  year = {2026},
  eprint = {2604.11430},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2604.11430},
}