OpenRouter AI SDK , tool example

README.md

OpenRouter AI SDK , tool example

---

• install

npm install @openrouter/ai-sdk-provider ai zod tsx

---

• start

npx tsx example.ts

---

example.ts

import { createOpenRouter } from '@openrouter/ai-sdk-provider';
import { generateText, tool, stepCountIs } from 'ai';
import { z } from 'zod';

const OPENROUTER_API_KEY="your-key";
const MODEL_NAME = "openai/gpt-oss-120b";

export const getWeather = async (modelName: string) => {
  const openrouter = createOpenRouter({
    apiKey: OPENROUTER_API_KEY,
  });
  const { text } = await generateText({
    model: openrouter(modelName),
    prompt: 'Tokyo の天気は ?',
    tools: {
      getWeather: tool({
        description: 'Get the current weather in a given city.',
        parameters: z.object({
          city: z.string().describe('The city name'),
        }),
        execute: async ({ city }) => {
          return `The weather in ${city} is sunny.`; 
        },
      }),
    },    
    stopWhen: stepCountIs(5),
  });
  console.log(text);
  return text;
};

const main = async function(){
  await getWeather(MODEL_NAME);
}
main();

package.json

{
  "name": "ai_test1",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "type": "module",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "@openrouter/ai-sdk-provider": "^2.10.0",
    "ai": "^6.0.217",
    "tsx": "^4.22.4",
    "zod": "^4.4.3"
  }
}