langchain-paypack 0.7.5

让 AI Agent 自己收钱：一行代码集成支付宝/微信/USDC/ETH 支付。支持 LangChain Agent、x402 协议、AP2 协议。

langchain-paypack / paypack-langchain

AI Agent Payment — One line of code. Alipay · WeChat Pay · USDC · ETH.

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📦 安装 / Installation

pip install langchain-paypack
# or
pip install paypack-langchain

要求 Python 3.10+ | Requires Python 3.10+

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中文文档

🚀 三步接入

第一步：获取 API Key

curl -X POST https://rhcjw.com/pay/v1/register \
  -H "Content-Type: application/json" \
  -d '{"name": "你的项目名"}'

返回：

{"api_key": "ppk_你的API_KEY"}

第二步：创建一笔支付

from paypack_langchain import PayPackTool

tool = PayPackTool(
    api_key="ppk_你的API_KEY",
    base_url="https://rhcjw.com/pay"
)

result = tool.run(amount=0.01, subject="AI 数据查询")
print(result)
# 输出：订单已创建，金额 ¥0.01，扫码支付

第三步：查询支付结果

from paypack_langchain import PayPackQueryTool

query = PayPackQueryTool(api_key="ppk_你的API_KEY", base_url="https://rhcjw.com/pay")
print(query.run(order_id="PP2026071400ABC123"))
# 输出：{"status": "success", "amount": 0.01}

🧠 在 LangChain Agent 中使用

from langchain.agents import create_react_agent, AgentExecutor
from langchain_openai import ChatOpenAI
from langchain_core.tools import Tool
from paypack_langchain import PayPackTool

pay_tool = PayPackTool(api_key="ppk_你的API_KEY", base_url="https://rhcjw.com/pay")

tools = [
    Tool(
        name="pay_for_data",
        func=lambda q: pay_tool.run(amount=0.01, subject=q),
        description="用户需要付费数据时调用，返回支付二维码"
    )
]

llm = ChatOpenAI(model="gpt-4")
agent = create_react_agent(llm, tools, prompt="你是一个数据查询助手。付费数据先调用 pay_for_data 生成支付。")
executor = AgentExecutor(agent=agent, tools=tools, verbose=True)

result = executor.invoke({"input": "查最新市场数据"})
print(result)

💰 支持的币种

币种	路由	网络	示例
CNY	Cloud API	支付宝 / 微信支付	currency="CNY"
USDC	链上签名	Base / Ethereum / Polygon / Arbitrum	currency="USDC", to="0x..."
ETH	链上签名	Base / Ethereum / Polygon / Arbitrum	currency="ETH", to="0x..."

📖 API 参考

PayPackTool（创建支付）

参数	类型	必填	说明
api_key	string	CNY 必填	API Key (ppk_...)
base_url	string	CNY 必填	https://rhcjw.com/pay
private_key	string	USDC/ETH 必填	钱包私钥或环境变量 PRIVATE_KEY
network	string	可选	默认 base-sepolia
broadcast	bool	否	True=上链，False=仅签名
amount	float	是	金额（CNY=元，USDC/ETH=币数量）
subject	string	是	商品描述
currency	string	否	CNY(默认) / USDC / ETH
to	string	USDC/ETH 必填	收款地址 0x...
callback_url	string	否	回调地址

PayPackQueryTool（查询支付）

参数	类型	必填	说明
api_key	string	是	API Key
base_url	string	是	https://rhcjw.com/pay
order_id	string	是	订单号

🔗 链接

• 在线体验: https://rhcjw.com/pay
• GitHub: https://github.com/rhcjw/paypack
• 问题反馈: https://github.com/rhcjw/paypack/issues

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English Documentation

🚀 Quick Start

Step 1: Get API Key

curl -X POST https://rhcjw.com/pay/v1/register \
  -H "Content-Type: application/json" \
  -d '{"name": "my_project"}'

Returns:

{"api_key": "ppk_your_api_key"}

Step 2: Create a payment

from paypack_langchain import PayPackTool

tool = PayPackTool(
    api_key="ppk_your_api_key",
    base_url="https://rhcjw.com/pay"
)

result = tool.run(amount=0.01, subject="AI data query")
print(result)
# Output: Order created, ¥0.01, scan to pay

Step 3: Check payment status

from paypack_langchain import PayPackQueryTool
query = PayPackQueryTool(api_key="ppk_your_api_key", base_url="https://rhcjw.com/pay")
print(query.run(order_id="PP2026071400ABC123"))
# Output: {"status": "success", "amount": 0.01}

🧠 Use with LangChain Agent

from langchain.agents import create_react_agent, AgentExecutor
from langchain_openai import ChatOpenAI
from langchain_core.tools import Tool
from paypack_langchain import PayPackTool

pay_tool = PayPackTool(api_key="ppk_your_api_key", base_url="https://rhcjw.com/pay")

tools = [
    Tool(
        name="pay_for_data",
        func=lambda q: pay_tool.run(amount=0.01, subject=q),
        description="Call this when user needs paid data. Returns payment QR code."
    )
]

llm = ChatOpenAI(model="gpt-4")
agent = create_react_agent(llm, tools, prompt="You are a data assistant. For paid data, first call pay_for_data.")
executor = AgentExecutor(agent=agent, tools=tools, verbose=True)

result = executor.invoke({"input": "Get latest market data"})
print(result)

💰 Supported Currencies

Currency	Route	Networks	Example
CNY	Cloud API	Alipay / WeChat Pay	currency="CNY"
USDC	On-chain	Base / Ethereum / Polygon / Arbitrum	currency="USDC", to="0x..."
ETH	On-chain	Base / Ethereum / Polygon / Arbitrum	currency="ETH", to="0x..."

📖 API Reference

PayPackTool

Param	Type	Required	Description
api_key	string	for CNY	API Key (ppk_...)
base_url	string	for CNY	https://rhcjw.com/pay
private_key	string	for USDC/ETH	Wallet private key or env PRIVATE_KEY
network	string	optional	Default base-sepolia
broadcast	bool	no	True=broadcast, False=dry-run
amount	float	yes	Amount in CNY/USDC/ETH
subject	string	yes	Description
currency	string	no	CNY(default) / USDC / ETH
to	string	for USDC/ETH	Recipient 0x...
callback_url	string	no	Webhook URL

PayPackQueryTool

Param	Type	Required	Description
api_key	string	yes	API Key
base_url	string	yes	https://rhcjw.com/pay
order_id	string	yes	Order ID

🔗 Links

• Try it live: https://rhcjw.com/pay
• GitHub: https://github.com/rhcjw/paypack
• Issues: https://github.com/rhcjw/paypack/issues