How to integrate 123FormBuilder with MailChimp

With the 123FormBuilder – Mailchimp integration, you can import emails and leads from your submitters to your Mailchimp lists or unsubscribe them. Provide your Mailchimp API Key and select Customize to set up your integration.

Mailchimp API key

To retrieve the API key of your Mailchimp account, follow the steps below:

1. Log in to your Mailchimp account and go to your account settings (your username → Account).

2. Afterward, go to Extras and select API keys from the dropdown list.

API keys

3. Press Create A Key and a code will be generated on a line below Your API keys. That is your API key.

Mailchimp API keys

4. Copy-paste the API key in the Mailchimp application box from your form builder account.

Mailchimp integration

Customizing the integration

In the Customize lightbox, use the Action dropdown to select any of the two available options:

  • Add subscriber
  • Unsubscribe email

You cannot select more than one action per integration. The first action will create a new subscriber in the mailing list you have selected in the Use List dropdown. The second action will unsubscribe the email address that has been specified on the form.

In Options, you can choose to update existing subscribers or add a double opt-in to request confirmation before adding new subscribers to your list. It’s important to mention that the two options do not work together.

Use the Groups subsection if you have groups in the selected list.

In Fields, match Mailchimp fields with your form fields. If you have required fields in Mailchimp, it is necessary to match them with the corresponding field on your form. For the integration to work properly, we strongly recommend making the form field required as well.

Lastly, use the Error Handling subsection to set the email address that will be informed of any errors that might occur upon submission.

Customize Mailchimp application

Due to security reasons on behalf of Mailchimp, you cannot embed online forms in email marketing campaigns. Therefore, we recommend you add the link to your form in the email template, if you want to send it to your subscribers. Embedding forms in any email represents risks and there are very few services that support it, not to mention that there is a high chance end users will not be able to complete the form within the content of the email, as a reply.

Pro Tip: You can enable multiple Mailchimp integrations on the same form.

Frequently Asked Questions

Here is a list of the most frequently asked questions. For more FAQs, please browse through the  FAQs page.

Is this service free?
Yes, we offer a free form builder service. Just sign up to the Basic plan and you are all set. This plan is forever free, but you are limited with a few features only, such as 5 forms per account, 100 submissions per month and you have to keep the backlink to 123FormBuilder on your forms. Check out our features matrix for more information.
How many forms can I create?
It depends on the service plan you are on. Higher service plans enable more features, including more web forms for your account. If you need more forms, go to the My Account section of your account and click the upgrade button. To create an unlimited number of forms, either upgrade to the Platinum service plan or higher. Consult our features matrix for more information.
How can I publish my forms?
You can publish your forms in many ways, by using their direct URL or HTML link, embedding them with a JavaScript code, Inline HTML or iFrame, using the Facebook app or the WordPress plugin, using popups, the Blogger code snippet and many more. Once you have created and customized your form, go to the Publish section to complete your work. Read more in our documentation.
How do I change my form design?
You can change the design of your form for more information. in the Themes section, which is located in your form settings. We offer a set of more than 30 predefined form themes for your forms, but you can also create your own from scratch. You can customize the submit button, the logo and more. To apply your own stylesheets, all forms come with a custom CSS editor.

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