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      How to Use the Letterhead WordPress Plugin

      This article explains how to install, connect, and use the Letterhead WordPress plugin so you can easily embed subscribe forms or newsletter content directly on your WordPress site.

      What You Can Do With the Plugin

      With the Letterhead WordPress plugin, you can:

      • Embed your newsletter signup form on any page or post

      • Add Letterhead blocks using the WordPress block editor

      • Customize styling directly from WordPress

      Step-by-Step Instructions

      Part 1: Install the Plugin

      1. Log in to your WordPress Dashboard.

      2. Navigate to Plugins in the left-hand sidebar and click Add New.

      3. In the search bar, type Letterhead.

      4. Locate the plugin created by tryletterhead and click Install Now.

      5. Once installed, click Activate.

      Part 2: Generate Your API Key

      To connect WordPress to Letterhead, you need a secure key from your Letterhead account.

      1. Open a new tab and log in to your Letterhead Dashboard.

      2. Go to Settings and select API Keys from the menu.

      3. Click the + Generate new key button.

      4. Enter a name for the key (e.g., "WordPress Connection") and click Save. 


      Part 3: Configure Plugin Settings

      1. Return to your WordPress Dashboard.

      2. Navigate to Settings > Letterhead.

      3. Paste the key you copied into the API Key field.

      4. Enter a Prefix for your site (this helps identify the source of the content in Letterhead).

      5. Click Save. You should see a "Settings saved" confirmation message.

      Part 4: Map Your Channels

      1. On the Letterhead settings page in WordPress, click the Channels tab.

      2. You will see your Site Name listed. Click the dropdown menu under Mapped Channel.

      3. Select the specific Letterhead channel you want your WordPress posts to feed into.

      4. Click Save Mapping.

      Part 5: Create and Use Content

      1. Create and Publish a new post in WordPress.

      2. Go back to your Letterhead Dashboard.

      3. Navigate to Newsletters > Curations.

      4. Your new WordPress post should appear in the list with the source marked as "Application."

      Troubleshooting & FAQs

      • My API key isn't working. If you receive an error regarding the API key, return to the Letterhead Settings > API Keys section, generate a brand new key, and paste the new secret into your WordPress settings.
      • My posts aren't showing up in Letterhead. Ensure that you have clicked Save Mapping in the Channels tab of the plugin settings. If a channel is not selected, Letterhead will not know where to route your content.

      Need Help?

      If you have questions or need assistance, please contact our support team at support@tryletterhead.com or log a support ticket through the Help Center!