export BROWSERBASE_API_KEY="your_api_key"

browse functions init my-function
cd my-function

my-function/
├── package.json
├── index.ts        # Your function code
└── .env            # Add credentials here

echo "BROWSERBASE_API_KEY=$BROWSERBASE_API_KEY" >> .env

pnpm install

import { defineFn } from "@browserbasehq/sdk-functions";
import { chromium } from "playwright-core";

defineFn("my-function", async (context) => {
  const { session, params } = context;

  // Connect to browser
  const browser = await chromium.connectOverCDP(session.connectUrl);
  const page = browser.contexts()[0]!.pages()[0]!;

  // Your automation
  await page.goto(params.url || "https://example.com");
  const title = await page.title();

  // Return JSON-serializable result
  return { success: true, title };
});

browse functions dev index.ts

curl -X POST http://127.0.0.1:14113/v1/functions/my-function/invoke \
  -H "Content-Type: application/json" \
  -d '{"params": {"url": "https://news.ycombinator.com"}}'

browse functions publish index.ts

Function published successfully
Build ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
Function ID: xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx