Connect WPForms to MailerLite

Connect WPForms to MailerLite and every submission becomes a subscriber in the group you choose. The free ClickSyncr for MailerLite plugin adds a ClickSyncr MailerLite section to the WPForms builder: paste a key, pick a group, map fields, save. Groups and fields load the moment the key is in place.

Before you begin

You need three things: the ClickSyncr for MailerLite plugin activated, WPForms active, and a MailerLite account (the free tier is fine, with permission to create an API token). WPForms stores the API key per form, inside the form builder’s Settings panel.

Get your MailerLite API key

Log in to MailerLite and go to Integrations → API (dashboard.mailerlite.com/integrations/api).
Generate a new token and give it a recognisable name such as WordPress ClickSyncr.
Copy it immediately: MailerLite shows the full token only once. If you lose it, generate another.

Treat the token like a password. Anyone holding it can read and modify your MailerLite subscribers.

WPForms setup, step by step

Edit a form, then open Settings → ClickSyncr MailerLite. In the form builder, click Settings in the left column, then ClickSyncr MailerLite in the list of sections. Direct link pattern: /wp-admin/admin.php?page=wpforms-builder&view=settings&form_id=YOUR_FORM_ID&section=clicksyncr_mailerlite.

ClickSyncr MailerLite in the WPForms Settings sidebar.
Paste your API key, then pick the group. The key box is masked as you type. As soon as a valid key is in place the group dropdown and the mapping rows load automatically; you do not have to save first.

Masked API key with the group list already populated from MailerLite.
Map your fields. Each MailerLite field gets a dropdown of your form’s fields. Every dropdown starts blank on purpose: nothing syncs until you map Email, which prevents the wrong field being sent silently. Set Email first, then add the others.

Field mapping: each MailerLite field paired with a WPForms field.
Save the form. Save at the top right of the builder stores the key and mapping.

The nine MailerLite fields

Every builder maps the same nine standard MailerLite fields, and any custom fields in your account appear in the list automatically. Only Email is mandatory; an unmapped field is simply skipped and never overwrites existing subscriber data with a blank value. If MailerLite rejects one value’s type, that single field is dropped and the subscriber still syncs.

Field	MailerLite key	Notes
Email	`email`	Required. The subscriber identifier.
Name	`name`	First name.
Last name	`last_name`
Phone	`phone`
Company	`company`
City	`city`
Country	`country`
State	`state`
Zip	`z_i_p`	MailerLite’s key really is z_i_p.

Verify the sync

Submit the form on the front end (not the admin preview) with a test address you can recognise, filling every mapped field. In MailerLite, open Subscribers and confirm the subscriber exists, sits in the group you selected, and carries the mapped values. That one minute catches almost every configuration mistake.

Troubleshooting

Symptom	Cause and fix
The group dropdown is empty	The key is missing, mistyped, or was revoked in MailerLite. Re-paste it and reconnect. A key with a trailing space is the classic culprit.
Submissions do not appear in MailerLite	Nine times out of ten the Email field is not mapped. It is the one required mapping. Fix it, then submit a fresh test.
Changing the key did not take effect everywhere	WPForms stores a key per form, so update each form that syncs.
The subscriber syncs but a field is empty	Either that field is unmapped, or it was blank on the submission. Empty values are skipped so they never wipe existing MailerLite data.
One field never arrives, the rest do	MailerLite rejected that value’s type, for example letters in a number field. The plugin drops just the offending field and syncs the rest.

Why are the WPForms mapping dropdowns blank at first?

By design. A blank default can never silently send the wrong field to MailerLite. Map Email and the sync starts working.

Do I need WPForms Pro?

No. The integration works with the free WPForms plugin; it lives in the builder’s standard Settings panel.

Other form builders

ClickSyncr for MailerLite also connects Contact Form 7 · Gravity Forms · Ninja Forms · Fluent Forms · Formidable Forms · Forminator. Overview, features and pricing: MailerLite integration for WordPress. Browse all ClickSyncr integrations.

“MailerLite” is a trademark of its respective owner. ClickSyncr for MailerLite is an independent integration and is not affiliated with, endorsed by, or sponsored by MailerLite.

Frequently asked questions

Does unchecked consent send an Unconfirmed subscriber to MailerLite?

An unchecked configured consent field currently prevents the WPForms submission from being sent to MailerLite. That differs from selecting Unconfirmed as the saved subscriber status when no consent field is used. Check both controls before testing: the consent answer takes priority. A recorded “Nothing was sent. Consent was not given.” result means there was no subscriber request for that submission.

What does the MailerLite rate-limiting error mean?

The message “MailerLite is rate limiting this account. Try again shortly.” means MailerLite refused the request because of its request limit. It is a delivery error, not evidence that the WPForms field mapping is wrong. Avoid repeatedly submitting the form while investigating. Check the contact and the recorded result, allow the account limit to clear, and then run a controlled test.

Which types can a new MailerLite custom field use?

The plugin’s field-creation method accepts text, number, or date. A field also needs a nonempty name; choosing another type is rejected before the creation request is sent. Decide what the WPForms answer represents before creating its destination field. A numeric answer belongs in a number field, while descriptive content needs text. After creating the field, check the mapping and submit a representative value.

Connect WPForms. Send every lead to MailerLite.

Connect, map, test, publish.

Prepare the fields

Connect the account

Choose the destination

Match the fields

Submit and verify

The ClickSyncr for MailerLite settings.

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