BuyWhere LangChain Integration

LangChain tools for the BuyWhere product catalog API. Add product search, price comparison, and affiliate links to any LangChain agent.

Installation

pip install buywhere-langchain

Quick Start

from langchain.agents import create_react_agent, AgentExecutor
from langchain_openai import ChatOpenAI
from buywhere_langchain import BuyWhereToolkit

toolkit = BuyWhereToolkit(api_key="bw_live_xxx")
tools = toolkit.get_tools()

llm = ChatOpenAI(model="gpt-4o")
agent = create_react_agent(llm, tools, prompt)
agent_executor = AgentExecutor(agent=agent, tools=tools)

result = agent_executor.invoke({"input": "find me a laptop under $1000 in Singapore"})
print(result["output"])

Available Tools

LangGraph

from langgraph.prebuilt import ToolNode

tool_node = ToolNode(toolkit.get_tools())

Error Handling

Tools return typed errors for auth failures, rate limits, and not-found:

• BuyWhereError — base exception
• RateLimitError — retry with backoff
• AuthenticationError — invalid API key
• NotFoundError — product/resource not found

Get an API Key

Sign up at buywhere.ai to get your API key.