Automate Lead Capture: WordPress Form to Mautic Integration with n8n

1. The Challenge Luiz Eduardo Faces: Manual Lead Entry Nightmare

Imagine Luiz Eduardo, a marketing manager running a growing online business. Luiz uses WordPress forms to collect leads daily. However, manually entering these leads into Mautic—a popular marketing automation platform—is time-consuming and prone to errors. Sometimes, invalid emails sneak through, causing wasted effort and poor campaign performance. Luiz spends hours every week rechecking form data and correcting mistakes, delaying follow-up and losing potential sales.

This lack of automation leads to decreased productivity, inconsistent contact records, and lost revenue. Luiz needs a way to automatically capture WordPress leads, validate emails, and push the cleaned data into Mautic without manual intervention.

2. What This Workflow Does

This n8n workflow solves Luiz’s problem with seamless automation. When a WordPress form is submitted, the workflow:

• Receives the form data via a webhook triggered by the WordPress form submission.
• Extracts and normalizes key contact information such as name, email, WhatsApp/mobile number, and form ID.
• Validates the email format to ensure only proper emails move forward.
• Creates or updates a contact in Mautic with the lead’s information if the email is valid.
• Flags and adds contacts with invalid emails to Mautic’s “Do Not Contact” list for compliance.
• Ends the process cleanly once the contact is handled, ensuring system resources are conserved.

By automating these steps, Luiz can save several hours per week, reduce human error, and maintain a high-quality, up-to-date marketing list effortlessly.

3. Prerequisites ⚙️

• n8n account (self-hosted or cloud)
• WordPress site with forms configured to POST data
• Mautic account with API access and credentials ready
• Slack or email account is not needed here, focus is on WordPress form and Mautic
• Basic knowledge of how to use n8n’s interface

4. Step-by-Step Guide to Build This Automation

Step 1: Set up the WordPress webhook trigger

Navigate to your workflow canvas in n8n, and add a Webhook node named WordPressForm.

• Set the HTTP Method to POST.
• Copy the generated webhook URL and configure your WordPress form to send submissions via POST to this URL.
• You should see a confirmation message that the webhook has been created.
• This node will capture all form submission data as JSON for further processing.
• Common mistake: Forgetting to use POST method or not updating the WordPress form action URL.

Step 2: Normalize received form data with the Set node

Add a Set node named LeadData connected to WordPressForm.

• Map these fields using n8n expressions exactly as:
  name = {{$json.body.Nome.toTitleCase()}}
email = {{$json.body['E-mail'].toLowerCase()}}
mobile = {{$json.body.WhatsApp}}
form = {{$json.body.form_id}}
email_valid = {{$json.body['E-mail'].isEmail()}}
• This step cleans and separates form data, ensuring only required data fields proceed.
• Common mistake: Typos in field names will cause missing data downstream.

Step 3: Create contact in Mautic if email is valid

Add a Mautic node named CreateContactMautic connected to LeadData.

• Set email, firstName, and additional fields such as mobile using expressions.
• Select your preconfigured Mautic API credentials.
• This will create or update the contact in your Mautic database.
• Common mistake: Invalid or missing API credentials will cause connection failures.

Step 4: Add conditional logic to check email validity

Add an If node named CheckEmailValid connected from CreateContactMautic.

• Configure the IF node to check if email_valid is true from the JSON data.
• If true, the workflow ends normally after contact creation.
• If false, proceed to mark the contact as Do Not Contact.
• Common mistake: Misconfiguring boolean condition can cause valid leads to be dropped incorrectly.

Step 5: Flag invalid emails in Mautic Do Not Contact list

Add another Mautic node named LeadMauticDNC connected from the false branch of CheckEmailValid.

• Set contactId to {{$json.id}} (coming from contact creation response).
• Choose editDoNotContactList operation.
• Use additional fields to specify reason and comments to track invalid email flags.
• Common mistake: Not mapping contact ID correctly causes failure to flag the contact.

Step 6: End the workflow cleanly

Add a NoOp node named End connected from LeadMauticDNC.

• This final step ensures the workflow terminates without extra processing or errors.
• This is a good practice in automations to keep things tidy.

Recap of Data Flow

The WordPress form triggers the webhook, passing raw data to the Set node which normalizes it. The workflow then creates a Mautic contact. Based on email validation, it either ends or flags the contact as Do Not Contact.

5. Customizations ✏️

• Add More Form Fields: In the LeadData Set node, add additional mappings by expanding JSON expressions to include fields like $json.body.company or $json.body.message.
• Send Notification Email: Add a Gmail or EmailSend node after contact creation to notify the sales team of new leads.
• Enhance Email Validation: Replace the simple isEmail() check in the Set node with an API call to an email validation service using an HTTP Request node for better accuracy.
• Log Leads to Google Sheets: Add a Google Sheets node to log all leads as a backup and reporting system.
• Filter Leads by Form ID: Add an If node before contact creation to process leads differently based on the form submitted.

6. Troubleshooting 🔧

Problem: “Invalid API credentials” error on Mautic node

Cause: API credentials expired or were entered incorrectly.

Solution: Go to n8n Credentials, re-enter Mautic API keys, test the connection again.

Problem: Webhook not receiving WordPress submissions

Cause: Incorrect URL or HTTP method mismatch (not POST).

Solution: Verify the WordPress form action URL and ensure it points to the correct n8n webhook URL with POST method configured.

Problem: Email validation allowing invalid emails

Cause: Built-in isEmail() function has limitations.

Solution: Use an HTTP Request node to call an external email validation API for higher accuracy.

7. Pre-Production Checklist ✅

• Test WordPress form submits trigger webhook with expected JSON payload.
• Verify the Set node extracts and transforms all fields correctly.
• Confirm Mautic contact creation works from manual data inputs.
• Test invalid and valid emails flow correctly through the If node branches.
• Backup your workflow and test on staging environment before live deployment.

8. Deployment Guide

Activate your workflow in n8n by toggling it to “Active” status.

Monitor webhook hits and Mautic contact creation logs at the start to ensure expected operation.

Set up notifications or dashboards if needed to be alerted on errors or high volumes.

If self-hosting n8n, ensure server reliability and database backups are in place.

9. FAQs

• Q: Can I use a different CRM instead of Mautic?
  A: Yes, replace the Mautic node with another CRM node with similar field mappings.
• Q: Does this workflow consume many API credits?
  A: Mautic API usage is minimal per lead; watch your API rate limits if lead volume is very high.
• Q: Is my form data secure?
  A: Yes, n8n Webhook nodes use secure HTTPS endpoints; always use SSL for data transmission.
• Q: Can I scale this for hundreds of leads daily?
  A: Yes, n8n workloads scale well with proper infrastructure and database optimization.

10. Conclusion

By implementing this WordPress Form to Mautic integration with n8n, Luiz Eduardo automated a previously tedious manual process, saving hours weekly and improving data quality substantially. This workflow ensures only valid leads enter the marketing funnel, improving campaign success rates while reducing wasted effort.

Next steps could include adding richer notifications, multi-channel lead logging, or deeper integration with sales CRMs to accelerate lead conversion.

With this setup, you too can transform your lead capture process into a streamlined, reliable system that scales with your business needs—and enjoy the time savings and better marketing insights that come with it.