Set Up NMI in GoHighLevel

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How to Set Up the NMI Integration in GoHighLevel

If you manage payments across multiple platforms like ClickUp and CRM tools, integrating NMI with GoHighLevel lets you centralize payment processing for your funnels and forms. This guide walks you step by step through connecting your NMI payment gateway so you can start collecting payments securely inside your account.

The process involves preparing your NMI account, entering the correct keys into your GoHighLevel settings, and then enabling NMI inside your funnels and payment forms.

Prerequisites before connecting NMI to GoHighLevel

Before you configure the integration, confirm the following requirements are met so the GoHighLevel connection works smoothly:

  • An active NMI merchant account with login access
  • Administrator access to your GoHighLevel agency or sub-account
  • Correct API credentials from your NMI account (API key, security key, and/or username and password, depending on your NMI setup)
  • At least one funnel or form where you plan to accept payments

Having these items ready will make the GoHighLevel integration process much faster and help you avoid connection errors.

Step 1: Collect your NMI credentials for GoHighLevel

The first step is to log into your NMI account and locate the credentials that GoHighLevel requires for a secure integration.

  1. Sign in to your NMI merchant portal using your administrator credentials.

  2. Navigate to the section where API keys or security keys are managed. This is typically under settings, security, or API configuration.

  3. Locate your API key, security key, or username and password that NMI uses for gateway connections.

  4. Copy these credentials and store them in a safe temporary location so you can paste them into GoHighLevel in the next step.

Make sure you copy the values exactly as shown in NMI, because a single incorrect character will cause the GoHighLevel integration to fail.

Step 2: Open payment settings in GoHighLevel

Once your NMI details are ready, you can move into your GoHighLevel account and open the payment configuration area.

  1. Log in to your GoHighLevel dashboard with an account that has access to payment settings.

  2. Select the location or sub-account where you want to use NMI as a payment gateway.

  3. From the left-hand menu, open the Settings section.

  4. Within Settings, look for the Payments or Integrations area where payment gateways are configured.

This is where GoHighLevel allows you to connect different gateways, including NMI, so your funnels, forms, and invoices can process transactions.

Step 3: Add NMI as a payment gateway in GoHighLevel

With your NMI credentials ready and payment settings open, you can now create the live connection between NMI and GoHighLevel.

  1. In the payment or gateway section, click the option to Add Gateway or Connect NMI, depending on the exact label in your GoHighLevel interface.

  2. Choose NMI from the list of supported payment gateways.

  3. Paste your NMI API key, security key, username, and any other requested fields into the matching boxes.

  4. Verify that each field matches what you copied from NMI.

  5. Click Save or Connect to complete the integration.

If the credentials are valid, GoHighLevel will confirm that NMI is connected and ready to use. If you see an error, double-check the keys in your NMI account and re-enter them carefully.

Step 4: Enable NMI in GoHighLevel funnels and forms

After adding NMI as a gateway, you must enable it on the specific funnel steps and forms where you want to accept payments through GoHighLevel.

  1. Go to the Funnels section of your GoHighLevel sub-account.

  2. Open the funnel that includes an order form, checkout page, or payment step.

  3. Edit the funnel step that collects payments.

  4. Inside the step settings, locate the Products or Payment configuration area.

  5. Select NMI as the gateway for this funnel step, or toggle NMI on if multiple gateways are available.

  6. Save your funnel step to apply the NMI connection.

Repeat these actions for each funnel or form where you want NMI to process transactions inside GoHighLevel.

Step 5: Test your NMI integration in GoHighLevel

Before you send traffic to your live offers, run a test transaction to confirm NMI is working correctly with GoHighLevel.

  1. Open the published version of the funnel or form that you just configured.

  2. Complete the checkout form with test data, following any NMI testing instructions if you have a sandbox or test mode.

  3. Submit the form and confirm that the payment processes without errors.

  4. In your NMI dashboard, verify that the test transaction appears as expected.

  5. Back in GoHighLevel, check the contact record and any pipeline or workflow steps tied to a successful payment.

If everything looks correct, your NMI integration is ready for real customers in GoHighLevel.

Troubleshooting NMI and GoHighLevel integration issues

If NMI does not connect or payments fail in GoHighLevel, use the following checklist to diagnose the issue:

  • Incorrect credentials: Re-copy your API key, security key, and login details from NMI.
  • Gateway not selected on the funnel step: Confirm that NMI is enabled in the payment settings for each funnel step or form.
  • Permissions in NMI: Make sure the user account generating API keys has the correct gateway access.
  • Multiple gateways: If you use more than one gateway in GoHighLevel, confirm that NMI is chosen for the specific product or funnel you are testing.

For platform-specific behavior, always refer to the official GoHighLevel documentation on NMI integration at this support article.

Best practices for using NMI with GoHighLevel

To maintain a reliable and secure payment system, keep these best practices in mind when running NMI inside GoHighLevel:

  • Secure your credentials: Never share your NMI keys publicly or through unsecured channels.
  • Monitor failed payments: Use GoHighLevel reporting and your NMI dashboard to track declines or errors.
  • Keep funnels updated: After cloning or editing funnels, verify that the NMI gateway is still properly attached to each payment step.
  • Test after major changes: Whenever you update NMI settings or GoHighLevel payment configurations, run a fresh test transaction.

These steps help ensure that customers can complete purchases without interruptions and that your GoHighLevel automations run correctly after each successful payment.

Additional resources for GoHighLevel users

If you need strategic help implementing funnels, automations, or payment workflows around NMI in GoHighLevel, you can explore expert resources at Consultevo for consulting and implementation support.

For the most accurate and current technical instructions related directly to the NMI integration, always review the official GoHighLevel help center article at How to Set Up the NMI Integration.

Once NMI is configured correctly, you can confidently run paid funnels, manage subscriptions, and automate follow-up sequences inside your GoHighLevel account, all powered by your existing NMI merchant gateway.

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