customerio-webhooks-events

name	customerio-webhooks-events
description	Implement Customer.io webhook and reporting event handling. Use when processing email delivery events, click/open tracking, bounce handling, or streaming to a data warehouse. Trigger: "customer.io webhook", "customer.io events", "customer.io delivery status", "customer.io bounces", "customer.io open tracking".
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","webhooks","events","delivery"]
compatibility	Designed for Claude Code, also compatible with Codex and OpenClaw

Customer.io Webhooks & Events

Overview

Implement Customer.io reporting webhook handling: receive real-time delivery events (sent, delivered, opened, clicked, bounced, complained, unsubscribed), verify HMAC-SHA256 signatures, process events reliably with queuing, and stream to a data warehouse.

How Reporting Webhooks Work

Customer.io                    Your Server                   Data Warehouse
──────────                    ───────────                   ──────────────
Email sent   →  POST /webhooks/cio  →  Verify signature
Email opened →  POST /webhooks/cio  →  Parse event type
Link clicked →  POST /webhooks/cio  →  Route to handler  →  INSERT INTO events
Email bounced → POST /webhooks/cio  →  Suppress user

Configure at: Data & Integrations > Integrations > Reporting Webhooks

Prerequisites

• Public HTTPS endpoint for webhook receiver
• Webhook signing key from Customer.io dashboard
• Express or similar HTTP framework

Instructions

Step 1: Define Webhook Event Types

// types/customerio-webhooks.ts

// Customer.io reporting webhook event metrics
type CioMetric =
  | "sent"          // Message sent to delivery provider
  | "delivered"     // Delivery provider confirmed receipt
  | "opened"        // Recipient opened the email
  | "clicked"       // Recipient clicked a link
  | "converted"     // Recipient completed a conversion goal
  | "bounced"       // Email bounced (hard or soft)
  | "spammed"       // Recipient marked as spam
  | "unsubscribed"  // Recipient unsubscribed
  | "dropped"       // Message dropped (suppressed, invalid)
  | "deferred"      // Delivery temporarily deferred
  | "failed";       // Delivery failed

  {
  
  : ;
  : ;
  : ;          

  
  : ;
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}