Building a listed tool
Erik Reppel
Co-author of the x402 whitepaper; TSC Chair, x402 Foundation, named behind the x402 listing on Anchor Terminal.
What Erik builds
x402 A · Pay-per-call protocols
Protocol for per-request stablecoin payments using HTTP 402.
Co-author of the x402 whitepaper; TSC Chair, x402 Foundation, researched 28 October 2026 · the people behind it
Works with
- Brian Armstrong Co-founder and CEO, Coinbase
- Fred Ehrsam Co-founder, Coinbase
Questions
Who is Erik Reppel?
Erik Reppel is co-author of the x402 whitepaper; TSC Chair at x402 Foundation.
What does x402 Foundation (Linux Foundation) make?
Anchor Terminal lists x402 from x402 Foundation (Linux Foundation). Protocol for per-request stablecoin payments using HTTP 402.
How are Erik's tools graded?
x402 is graded A, 80 out of 100, on Anchor Terminal's benchmark, which scores every listing against the same checklist.
Sources (9)
- https://x402.org/
- https://x402.org/contact/
- https://x402.org/linux-foundation-announces-operational-launch-of-x402-foundation-to-standardize-internet-native-payments-for-ai-agents-and-applications/
- https://x402.org/leadership/
- https://x402.org/x402-whitepaper.pdf
- https://en.wikipedia.org/wiki/Coinbase
- https://www.ycombinator.com/companies/coinbase
- https://en.wikipedia.org/wiki/Brian_Armstrong_(businessman)
- https://en.wikipedia.org/wiki/Fred_Ehrsam
These are the people building the tools we list, named for their public role in the company or project behind a listing, from public pages, with the date it was researched. They don't work for Anchor Terminal (our own team is on the about page). We show public roles, public profiles and what the listing pages show, nothing private. To correct something, send an about or a photo, or have a page removed, write to privacy@anchorterminal.com.