Official SDK guides

TypeScript SDK

The TypeScript SDK is production-ready and fully functional. It includes typed resources for tasks, cron jobs, runs, events, workspaces, organizations, and invites.

Install

npm install @underlayer-app/sdk

Initialize client

import { Underlayer } from "@underlayer-app/sdk"

const client = new Underlayer({
  apiKey: "ul_live_xxx",
})

Create your first task

const task = await client.tasks.create({
  name: "send-welcome-email",
  targetUrl: "https://api.example.com/webhooks/email",
  executeAt: "2026-07-01T10:00:00Z",
  method: "post",
  payload: JSON.stringify({ userId: "u_123" }),
})

console.log(task.id)