How do I integrate workflow-generated dynamic content into my SendGrid dynamic template in n8n?

Below is how you can add dynamic data when using a SendGrid dynamic template in n8n:

Using Dynamic Template Fields

When you use a SendGrid dynamic template, you need to pass a JSON object containing your variable data. For example, if your dynamic template has placeholders like {{firstName}} and {{bodyContent}}, you would supply a JSON object with keys that match these variable names.

1. In your SendGrid node in n8n, locate the Dynamic Template Fields section.

2. Click the pencil (or use the expression editor) to open the JSON editor.

3. Enter your JSON mapping. For example:

   JSONCopied
   {
     "firstName": "John",
     "bodyContent": "This is the generated content from my workflow."
   }

   If your data is coming from previous nodes you can set the values with expressions:

   JSONCopied
   {
     "firstName": {{$json["firstName"]}},
     "bodyContent": {{$json["bodyContent"]}}
   }

Make sure your workflow’s output contains these keys.

When You Don’t See a Field to Map Variables

The UI may only show a generic text area for Dynamic Template Fields. Although it might seem like you can’t add or map any values, using the expression editor will allow you to input any data you need. Simply click into the field, switch to expression mode, and provide your JSON with the dynamic values.

Other Email Options in n8n

Currently, if you want to leverage dynamic template features with variable data, the SendGrid node is the best option within n8n. (Alternatively, you could use the Send Email node with SMTP if you prefer to build your own template in HTML, but that won’t be using SendGrid’s built-in dynamic template system.)

In summary, to input your variables:

• Use the JSON input within the Dynamic Template Fields by clicking into the field to enable expression mode.
• Map your keys (as set up in your SendGrid dynamic template) to your workflow data.

This approach works for SendGrid in n8n, and currently there isn’t an email service node that offers dynamic field mapping in a more guided way than what SendGrid offers.