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Documentation Index

Fetch the complete documentation index at: https://docs.brew.new/llms.txt

Use this file to discover all available pages before exploring further.

Connect your Customer.io account to use it as your email service provider for sending Brew-generated emails directly to your contacts.
Customer.io Integration

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Setup

1

Select your datacenter region

In Brew, go to Integrations and click the Customer.io card. Choose the region where your Customer.io account is hosted: US (United States) or EU (European Union).
Not sure which region you’re on? Check your Customer.io dashboard URL. EU accounts use fly.customer.io or have eu in the URL.
2

Go to API credentials in Customer.io

In Customer.io, navigate to Settings → Account Settings → API Credentials.
3

Paste your App API Key

Under App API Keys, create a new key, copy it, and paste it into Brew. Click Connect.
Use an App API key, not a Tracking API key. Copy it immediately as you won’t be able to view it again later.
That’s it. Customer.io is now connected to Brew.

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Sending through Customer.io

Once connected, send any email through Customer.io:
  1. Open an email you’ve created in Brew
  2. Click Send
  3. Choose to send through Customer.io instead of Brew
You still create and design emails in Brew. They get delivered through your Customer.io account.

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Importing templates into Customer.io Design Studio

The Customer.io integration sends emails through your account but doesn’t export templates directly into Customer.io. If you want to use a Brew email as a reusable template in Customer.io, you can do this manually via Customer.io’s Design Studio.
1

Export the HTML from Brew

In Brew, open the email you want to export. Click the three-dot menu and select Export HTML to download the HTML file.
2

Import into Design Studio

In Customer.io, go to Design Studio → Import → Upload and select the downloaded HTML file.
3

Edit in Code or Visual mode

The template will appear in Design Studio, where you can view and edit it in either Code or Visual mode using the Editor Preference toggle.
Design Studio uses an editor similar to Parcel.io (which is part of Customer.io). Visual edits — including spacing, padding, and styles — are made via CSS rather than Brew’s block-based controls. Images and links from the original Brew template are retained on import.

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Requirements

  • A Customer.io account
  • An App API key (not a Tracking API key)
  • Your datacenter region (US or EU)