LangChain

process.env.VALYU_API_KEY = "your-valyu-api-key-here";

import * as dotenv from "dotenv";
dotenv.config();

process.env.ANTHROPIC_API_KEY = "your-anthropic-api-key";
process.env.OPENAI_API_KEY = "your-openai-api-key";

import { ValyuSearchTool, ValyuAdapter } from "@valyu/langchain";

const valyuClient = new ValyuAdapter(process.env.VALYU_API_KEY!);

const tool = new ValyuSearchTool({
  client: valyuClient,
});

const searchResults = await tool.invoke({
  query: "What are agentic search-enhanced large reasoning models?",
  search_type: "all", // "all", "web", or "proprietary"
  max_num_results: 5,
  relevance_threshold: 0.5,
  max_price: 30.0,
});

console.log("Search Results:", JSON.parse(searchResults));

import { ValyuContentsTool, ValyuAdapter } from "@valyu/langchain";

const valyuClient = new ValyuAdapter(process.env.VALYU_API_KEY!);

const contentsTool = new ValyuContentsTool({
  client: valyuClient,
});

const urls = [
  "https://arxiv.org/abs/2301.00001",
  "https://example.com/article",
];

const extractedContent = await contentsTool.invoke({ urls });
const results = JSON.parse(extractedContent);

console.log("Extracted Content:", results.results);

for (const result of results.results || []) {
  console.log(`URL: ${result.url}`);
  console.log(`Title: ${result.title}`);
  console.log(`Content: ${result.content?.substring(0, 200)}...`);
  console.log(`Status: ${result.status}`);
  console.log("---");
}

import { ValyuSearchTool, ValyuAdapter } from "@valyu/langchain";
import { ChatAnthropic } from "@langchain/anthropic";
import { createReactAgent } from "@langchain/langgraph/prebuilt";
import { HumanMessage } from "@langchain/core/messages";

const valyuClient = new ValyuAdapter(process.env.VALYU_API_KEY!);

const llm = new ChatAnthropic({
  model: "claude-sonnet-4-20250514",
  apiKey: process.env.ANTHROPIC_API_KEY,
});

const valyuSearchTool = new ValyuSearchTool({
  client: valyuClient,
});

const agent = createReactAgent({ llm, tools: [valyuSearchTool] });

const userInput =
  "What are the key factors driving recent stock market volatility, and how do macroeconomic indicators influence equity prices across different sectors?";

const stream = await agent.stream({
  messages: [new HumanMessage(userInput)],
});

for await (const step of stream) {
  console.log(step.messages[step.messages.length - 1].content);
}