Current Affiliates

x4021 item

  1. Erik Reppel

    Software engineer and angel investor

    1. 5D

      Founder / CEO

      2026-06 – Present

    2. x402

      TSC Chair & Governing Board Liasion

      2026-04 – Present

    3. Coinbase

      Advisor, Agentic Commerce

      2026-05 – 2026-08

x402 | Cosign