@orizn/langchain

LangChain.js tools for the Orizn Visa API — check visa requirements for 39,585 passport-destination pairs in 15 languages.

Install

npm install @orizn/langchain

Quick start

import { OriznQuickVisaCheckTool, OriznVisaCheckTool } from "@orizn/langchain";

// No API key needed for quick checks
const quick = new OriznQuickVisaCheckTool();
const result = await quick.invoke(
  { passport: "FRA", destination: "JPN" }
);
console.log(result);

// Full details (needs API key)
const full = new OriznVisaCheckTool("your-api-key");
const details = await full.invoke(
  { passport: "FRA", destination: "JPN", lang: "fr" }
);
console.log(details);

Use with a LangChain agent

import { ChatOpenAI } from "@langchain/openai";
import { AgentExecutor, createOpenAIFunctionsAgent } from "langchain/agents";
import { OriznQuickVisaCheckTool, OriznVisaCheckTool } from "@orizn/langchain";

const tools = [
  new OriznQuickVisaCheckTool(),
  new OriznVisaCheckTool("your-api-key"),
];

// Use with your preferred LangChain agent setup

Available tools

| Tool | Description | API Key | |------|-------------|---------| | OriznVisaCheckTool | Full visa details with documents, process & tips | Required | | OriznQuickVisaCheckTool | Quick yes/no visa check | Not needed |

Links

• API
• Docs
• MCP Server
• Python package

License

MIT