PayPack · by Xiamen Shizhun Technology

Release notes and milestones

PayPack ships as langchain-paypack on PyPI. This page records the published versions and the milestone each one corresponds to.

Published versions

VersionPublishedNote
0.7.92026-07-17Current release on PyPI
0.7.82026-07-17Patch iteration
0.7.72026-07-17Patch iteration
0.7.62026-07-17Patch iteration
0.7.52026-07-14Patch iteration
0.7.42026-07-14Patch iteration
0.7.32026-07-13Patch iteration
0.7.22026-07-13Patch iteration
0.7.12026-07-13Patch iteration
0.7.02026-07-13Signer abstraction, batch settlement
0.5.02026-07-08Earlier public release

Milestones

MilestoneWhat it deliveredStatus
v0.1Base testnet x402 payment loop (ETH + USDC)Done
v0.2AP2 protocol supportDone
v0.3LangChain plugin publishedDone
v0.4Signer abstraction + ERC-4337 batch settlementDone
v0.5RPC failover + retry + limit persistenceDone
Dify pluginPay / query / refund toolsPublished
v0.6Alipay production launchVerified in production
v0.7WeChat Pay production launchVerified in production
v1.0PayPack Cloud managed serviceLive

Verified transactions

End-to-end payments recorded during development, used as integration proof:

CurrencyAmountReference
ETH0.0001 ETHOn-chain transaction hash
USDC0.001 USDCOn-chain transaction hash
Alipay (sandbox)CNY 0.63Sandbox trade number
Alipay (production)CNY 0.10Production trade number (paid and refunded)
WeChat Pay (production)CNY 0.05Production order (paid)

How to check the current version yourself

pip index versions langchain-paypack

or open the PyPI project page: pypi.org/project/langchain-paypack

Release cadence

The project publishes patch releases as integration fixes land. Check the PyPI release history for the complete, authoritative list — this page summarises it for readers who arrive from search.

Summary

PayPack is a developer tool for payment integration. It does not provide investment services, does not promise returns, and does not hold user funds.
Operated by Xiamen Shizhun Technology Co., Ltd. (Unified Social Credit Code: 91350211MA34XHGG5T) · Website: rhcjw.com · ICP filing: 闽ICP备2024041817号-2