Plugin
Updated
Authorize net
Ninja Forms Authorize.net is an add-on plugin by Ninja Forms that connects your forms to the Authorize.net payment gateway. Visitors can pay by credit card right on your site without being redirected, so a regular form can handle one-time charges, recurring billing and donations.
- Version
- 3.1.6
- Released
- Apr 20, 2026
- Developer
- Ninja Forms
- Type
- WordPress plugin
- Requires
- Ninja Forms
- Licence
- GPL
- Included in
- Every plan, or $4.79 a year on its own
What’s new in Authorize net 3.1.6
Version 3.1.6 · Apr 20, 2026
Latest
- FixedPrevent duplicate transactions when form has multiple payment actions
- ImprovedFix PHP 8.2 dynamic property deprecation warnings
- FixedFix undefined array key warnings in PaymentGateway
- ImprovedFix translation loading timing for merge tags
What it does
Collecting payments through a contact or registration form often means sending people off to a separate checkout page. This add-on keeps the whole process on your WordPress site. It works with Ninja Forms, which it requires, and links any form to your Authorize.net account using your API keys. Once connected, a form can take a credit card payment as part of the normal submission, which suits donations, event registrations, product orders and recurring plans.
Setup is mostly a matter of entering your API keys and adjusting a few settings, with no coding needed. You can run payments in sandbox mode to test everything before switching to live transactions. Amounts can be fixed, entered by the visitor or calculated within the form. Recurring payments support custom intervals, quantities and trial periods. Paired with the Ninja Forms PayPal add-on and Conditional Logic, one form can offer a choice between card and PayPal, and transaction data and logs are available inside Ninja Forms.
Best for
- Nonprofits collecting one-time or recurring donations
- Event organizers taking paid registrations
- Small businesses selling products or subscriptions through forms
Features
Simple API key connection
Connect any Ninja Form to your Authorize.net account by entering your API keys and toggling a few settings, with no coding required.
On-page card payments
Visitors enter their credit card details and pay directly on your site, so they are never redirected to another page to complete the transaction.
One-time and recurring billing
Accept single charges or set up subscription plans with customizable payment intervals and quantities for ongoing billing.
Subscription trial periods
Add a trial period to recurring payments so new subscribers can start before regular billing begins.
Flexible payment amounts
Charge a fixed price, let people type in their own payment or donation amount, or calculate the total from other fields in the form.
Sandbox and live modes
Test your payment workflow in sandbox mode with no real charges, then switch to live mode when your forms are ready.
Card or PayPal choice
Combined with the Ninja Forms PayPal add-on and Conditional Logic, a single form can let users choose between credit card and PayPal.
Transaction data and logs
Review transaction details and logs inside Ninja Forms to track payments and find the cause of card verification or submission errors.
Authorize net older versions
- 3.1.5Feb 53 fixes
- 3.1.1Apr 18, 20231 improvement, 1 removal
Members and buyers of this product can download older versions.
Questions about Authorize net
Do I need Ninja Forms to use this?
Yes. This is an add-on for Ninja Forms, so the Ninja Forms plugin must be on your site. It adds Authorize.net payment processing to the forms you build there, and you will also need an Authorize.net account with API keys.
Can donors choose how much they want to give?
Yes. You can let visitors enter their own payment or donation amount. You can also set a fixed price or have the form calculate a total from other fields, depending on what the form is for.
Can I test payments before accepting real money?
Yes. The add-on includes a sandbox mode for testing your payment workflow without real charges. When you are satisfied that everything works as expected, you switch the form to live mode to start processing actual transactions.
Can I offer PayPal alongside credit cards on the same form?
You can, by pairing this add-on with the Ninja Forms PayPal add-on and Conditional Logic. That setup lets visitors pick their payment method, either credit card through Authorize.net or PayPal, within a single form.
Is Authorize net free?
The code of Authorize net is licensed under the GPL, so anyone may use, change and share it. GPL Feast is a paid service: a plan or a single purchase gives you the download and automatic updates. The developer's own support, licence key and online services are not included.
Which version of Authorize net is this?
Version 3.1.6, released Apr 20, 2026. New versions appear here when the developer publishes them, and members get them as automatic updates.
How do I update Authorize net?
Install the free GPL Feast Updater on your site and connect it with your API key. It installs new versions of Authorize net automatically and keeps a backup, so you can roll back.
What does Authorize net need?
Authorize net needs Ninja Forms installed and active.
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