Intelliprint
Intelliprint

Marketing automation

Klaviyo

Add postcards and letters to Klaviyo flows — one webhook, no Zapier required.

Direct API integrationVisit Klaviyo

What it does

How Klaviyo works with Intelliprint.

Klaviyo is excellent for email. It is not a strategy for the customers who never open email. Connecting Klaviyo to Intelliprint lets you add a postcard or letter step to any Klaviyo flow — welcome series, abandoned cart, win-back, post-purchase — so the contacts who've gone cold still get reached through the one channel they can't filter out.

One route handles everything. In your Klaviyo Flow Builder, add a Webhook step that calls the Intelliprint API directly — no separate app to install, no per-automation cost. It supports letters, postcards, and direct mail from the same flow.

Mail lands three to five working days later. Intelliprint creates each piece as a draft by default, so you can preview before switching a flow to live.

Common use cases

What teams build with Klaviyo + Intelliprint.

  • Send a postcard to profiles that haven't opened email in 30 days (via webhook)
  • Trigger a letter when a customer reaches VIP status (via webhook)
  • Post a welcome pack after first purchase (via webhook)
  • Send a reactivation postcard to lapsed high-LTV customers (via webhook)
  • Mail a physical thank-you after a review submission (via webhook)

Set-up

Get connected in 4 steps.

  1. Get an Intelliprint API key

    Create a key in the Developers → API Keys section of your Intelliprint dashboard. Keys are shown once when created — store it securely.

    Creating an API key in the Intelliprint dashboard's Developers → API Keys screen

  2. Add a webhook step to your Klaviyo flow

    In Flow Builder, click the + icon to add a step, then choose Webhook from the Data sub-menu.

    In your Klaviyo Flow Builder, click the + icon to add a step, then choose Webhook from the Data sub-menu:

    Adding a Webhook step via the Data menu in the Klaviyo Flow Builder

  3. Configure the webhook

    Set the destination URL, an Authorization header with your API key, and the JSON body.

    Set the destination URL to https://api.intelliprint.net/v1/prints, add an Authorization header with your Intelliprint API key, and build the JSON body from your profile properties:

    Example JSON body
    JSON
    {
  "testmode": false,
  "confirmed": true,
  "template": "YOUR_TEMPLATE_ID",
  "recipients": [
    {
      "address": {
        "name": "John Doe",
        "line": "123 Main Street, Anytown, Anyplace",
        "postcode": "AB1 2CD",
        "country": "GB"
      },
      "variables": {
        "salutation": "Mr."
      }
    }
  ]
}
    Klaviyo webhook configuration panel showing the Authorization header and JSON body editor

  4. Test, then go live

    Test with a single profile before enabling for the full segment. Intelliprint creates the piece as a draft by default; preview in the dashboard, then switch to auto-send.

On the roadmap. A native Klaviyo integration with Flow Actions is on the roadmap. Today, letters, postcards, and direct mail can all be sent via a single Webhook step in Klaviyo Flow Builder, calling the Intelliprint API directly.

Ready to send mail from Klaviyo?

Free to start. No setup fees, no minimum order.

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