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As someone who has actually built working micro payments systems, this was of interest. Worth noting though that it's really just "document-ware" -- there's no code there[1], and their proposed protocol doesn't look like it was thought through to the point where it has all the pieces that would be needed.

[1] E.g. this file is empty: https://github.com/coinbase/x402/blob/main/package.json

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> Worth noting though that it's really just "document-ware" -- there's no code there

That's not true. That project is a monorepo, with reference client and middleware implementations in TypeScript, Python, Java, and Go. See their respective subdirectories. There's also a 3rd-party Rust implementation[1].

You can also try out their demo at [2]. So it's a fully working project.

[1]: https://github.com/x402-rs/x402-rs

[2]: https://www.x402.org/

> As someone who has actually built working micro payments systems

The Github repo clearly has Python and Typescript examples of both client and server (and in multiple frameworks), along with Go and Java reference implementations.

Maybe check the whole repo before calling something vaporware?

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