feat: (ecosystem) ZeroPay

[sunhuachuang]

Description

ZeroPay is an open source, lightweight, self-hosted payment gateway that enables merchants to accept stablecoin and cryptocurrency payments with minimal setup. ZeroPay now supports the x402 Agent-to-Agent (A2A) payment protocol. And we also open source the 8004 SDK for user to register the payment service.

Documentation:
code: https://github.com/zpaynow/ZeroPay/tree/main/x402
docs: https://github.com/zpaynow/ZeroPay/blob/main/x402.md

Tests

Checklist

• I have formatted and linted my code
• All new and existing tests pass
• My commits are signed (required for merge) -- you may need to rebase if you initially pushed unsigned commits

[cb-heimdall]

✅ Heimdall Review Status

Requirement	Status	More Info
Reviews	✅ 2/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2

[vercel]

@sunhuachuang is attempting to deploy a commit to the Coinbase Team on Vercel.

A member of the Team first needs to authorize it.

[sunhuachuang]

Update: we have a online playground for try and test x402 with our service: https://play.zpaynow.com/x402

Hi @erikreppel-cb How about this PR ?

[phdargen]

Hi @sunhuachuang, looks great but we require commit signing, happy to merge on you rebase with signed commits.

See here for instructions: https://docs.github.com/en/authentication/managing-commit-signature-verification/about-commit-signature-verification

[sunhuachuang]

Hi @phdargen, Thanks! I've rebased the branch and re-signed all commits — they should now show as verified.
Please let me know if anything else is needed.