Want to grow your email list by connecting your WordPress form to Kit (formerly ConvertKit)? With this integration, you can automatically send form submissions to your Kit account and add subscribers to your marketing list.
With the Form block from Nexter Blocks, you can connect your Kit (formerly ConvertKit) account to your WordPress form.
Best Used For:
- WordPress sites with contact or lead capture forms that feed into email marketing
- WooCommerce stores using Kit to build customer email lists from purchase forms
- Online course or membership sites capturing leads with Kit automations
To check the complete feature overview documentation of the Nexter Blocks Form block, see How to Add a Form in WordPress.
Note: This block is part of Nexter Blocks. Make sure Nexter Blocks is installed and activated before following these steps.
Learn via Video Tutorial
For this, you must have the Kit (formerly ConvertKit) API Key.
Get Kit (formerly ConvertKit) API Key
Create an account in Kit (formerly ConvertKit) if you do not already have one. Once you are logged into your account, follow the steps.
1. Click on the user profile on the top right.
2. Then click on Settings from the dropdown.
3. On the next page, click on Developer in the left menu.
4. On the screen, you will have your API Key.

Create a Form in Kit (formerly ConvertKit)
Now you have to create a form in Kit (formerly ConvertKit). To do this, follow the steps.
1. From the Kit (formerly ConvertKit) dashboard, go to Grow > Landing Page & Forms.
2. Then, on the next page, click on the Create a Form button.
3. On the next page, select any form type.
4. After that, select a form template.
5. Then click on the Publish button on the next page.
Note: Make sure to disable Double-Opt-in in your form so users can be added automatically, otherwise, you have to manually approve each user.
Use the Form Block
Now, add the Form block to the page and select the appropriate form type, then follow the steps.
1. Add the required form fields and customize them as needed.
2. Then select the main form block and go to the Action After Submit tab and select ConvertKit from the Options dropdown.
3. You will now see the ConvertKit tab. Open it.
4. Then add your API key in the Custom API Key field. To show the form only to specific visitor segments, the Display Rules feature lets you control when and where the form appears on your site.
Now, when a user fills out your form, they will be automatically added to your Kit (formerly ConvertKit) contact list. To display the form as an overlay instead of inline, see How to Add a Popup Builder in WordPress to embed the form inside a timed or triggered popup.











