customerio-hello-world

name	customerio-hello-world
description	Create a minimal working Customer.io example. Use when learning Customer.io basics, testing SDK setup, or creating your first identify + track integration. Trigger: "customer.io hello world", "first customer.io message", "test customer.io", "customer.io example", "customer.io quickstart".
allowed-tools	Read, Write, Edit, Bash(npm:*), Bash(npx:*), Glob, Grep
version	1.14.0
license	MIT
author	Jeremy Longshore <[e-mail]>
tags	["saas","customer-io","quickstart","testing"]
compatibility	Designed for Claude Code

Customer.io Hello World

Overview

Create a minimal working Customer.io integration: identify a user (create/update their profile), track an event, and send a transactional email. This covers the three fundamental Customer.io operations.

Prerequisites

• customerio-node installed (npm install customerio-node)
• CUSTOMERIO_SITE_ID and CUSTOMERIO_TRACK_API_KEY configured
• CUSTOMERIO_APP_API_KEY configured (for transactional email example)

Instructions

Step 1: Identify a User (Create/Update Profile)

// hello-customerio.ts
import { TrackClient, RegionUS } from "customerio-node";

const cio = new TrackClient(
  process.env.CUSTOMERIO_SITE_ID!,
  process.env.CUSTOMERIO_TRACK_API_KEY!,
  { region: RegionUS }
);

// identify() creates the user if they don't exist, or updates if they do.
// The first argument is your internal user ID (immutable — use DB primary key).
await cio.identify("user-123", {
  email: "[e-mail]",          // Required for email campaigns
  first_name: "Jane",
  last_name: "Doe",
  plan: "pro",
  created_at: Math.floor(Date.now() / 1000),  
});

.();