# Erik Reppel

> Erik Reppel is co-author of the x402 whitepaper; TSC Chair at x402 Foundation. x402 on Anchor Terminal, with grades, an about and public profiles.

- Canonical: https://www.anchorterminal.com/people/erik-reppel/
- Markdown: https://www.anchorterminal.com/people/erik-reppel/index.md (~650 tokens)
- Slim: https://www.anchorterminal.com/people/erik-reppel/index.min.md (~530 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/people/erik-reppel/index.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (full text: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-10-28

Co-author of the x402 whitepaper; TSC Chair, x402 Foundation.

## What Erik builds

- [x402](https://www.anchorterminal.com/tools/x402.md), graded A, 80/100, in Pay-per-call protocols. Protocol for per-request stablecoin payments using HTTP 402. Co-author of the x402 whitepaper; TSC Chair, x402 Foundation, researched 2026-10-28.

## Works with

- [Brian Armstrong](https://www.anchorterminal.com/people/brian-armstrong/), Co-founder and CEO, Coinbase
- [Fred Ehrsam](https://www.anchorterminal.com/people/fred-ehrsam-2/), 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

- 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, /about/#author). 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.

---

Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp