Authorize.net

How to integrate Authorize.net with Webflow

Webflow does not offer native Authorize.net support in its Ecommerce platform. According to the official Webflow Help Center, only Stripe and PayPal integrate directly through site settings. This means you'll connect Authorize.net through embedded payment forms, third-party integration platforms, or custom API implementations.

Embedded forms and third-party platforms work well for standard checkout flows and donation forms. API implementations give you control over custom payment workflows, subscription management, and integration with external systems. You'll find documentation for both approaches in the Authorize.net API Reference and Webflow Data API Documentation.

This guide covers embedded payment solutions first, then custom API implementation patterns for developers who need programmatic control.

Native features, direct embeds and widgets

Webflow's embed capabilities let you add Authorize.net hosted payment forms without writing backend code. These forms handle payment processing on Authorize.net's secure infrastructure while maintaining your site's design context.

The Webflow Embed component accepts HTML form code that posts directly to Authorize.net's payment endpoints. This approach qualifies for SAQ-A PCI compliance because payment data never touches your server. You configure the payment form in your Authorize.net merchant interface, generate the embed code, and paste it into an Embed element in Webflow Designer.

Accept Hosted iframe integration displays a payment form inside your Webflow page without redirecting customers. Configure this through the Accept Hosted API, which returns a secure token you embed in an iframe. The form matches your brand colors and collects payment information within Authorize.net's PCI-compliant environment.

Simple Checkout redirect method sends customers to a hosted payment page on Authorize.net's domain. Generate the form through Tools > Simple Checkout in your merchant interface, as documented in Authorize.net's Simple Checkout features. Customers complete payment on Authorize.net's page, then return to a confirmation URL you specify.

Third-party integration platforms connect Webflow forms to Authorize.net without custom code. Zapier integrations with Webflow trigger payment processing when someone submits a form. Pabbly Connect offers prebuilt workflows like "Create Subscription in Authorize.net when New Form Submission in Webflow." Foxy.io provides cart functionality with Authorize.net payment processing that works alongside Webflow's design tools.

PCI compliance requirements change based on your method. Iframe and redirect solutions qualify for SAQ-A compliance with around 22 questions. Merchant-hosted forms using Accept.js tokenization require SAQ A-EP compliance. Direct API integration without tokenization escalates to SAQ-D compliance with quarterly vulnerability scans, according to community discussions on PCI requirements.

Build with Webflow and Authorize.net APIs

API integration gives you programmatic control over payment flows, subscription management, and transaction monitoring. You'll use Webflow's CMS and form APIs to manage content and collect customer data, then process payments through Authorize.net's transaction APIs.

This approach works when you need custom checkout flows, real-time payment monitoring, or integration with external business systems. The implementation requires a middleware layer because Webflow's client-side environment can't securely store Authorize.net API credentials.

Processing one-time payments

One-time payment processing combines Webflow form submissions with Authorize.net's transaction API. Customers enter payment information in your Webflow form, JavaScript sends that data to your secure server, and your server creates a transaction through Authorize.net.

Use Webflow's Form element to collect customer details and payment amounts. Configure the form's action URL to point to your middleware endpoint instead of Webflow's default form handler. This endpoint must implement server-side processing because exposing Authorize.net API keys in client-side code creates security vulnerabilities.

Your server creates transactions with the createTransactionRequest API endpoint, which accepts payment details and returns transaction results. The API processes credit cards, e-checks, and other payment methods through a single endpoint with different payment profile objects.

Rate limits apply to transaction creation. The API allows 60 requests per minute per merchant account for createTransactionRequest calls, according to Authorize.net's developer community documentation. Burst traffic exceeding 120 requests per minute triggers 503 errors. Design your integration to handle rate limit responses and queue requests during high traffic periods.

Accept.js tokenization improves security for merchant-hosted payment forms. Include the Accept.js library in your Webflow page's custom code section, collect payment data in a form, and tokenize it before sending to your server. The Accept.js API reference documents the dispatchData method that converts sensitive payment information into single-use tokens.

Managing subscription billing

Subscription billing requires Customer Profile and Recurring Billing APIs. Create customer profiles that store payment methods, then set up recurring charges that process automatically on your schedule.

The Customer Profile API creates reusable payment profiles tied to customer records. Store a customer profile ID in your Webflow CMS using the CMS API. When customers manage their subscriptions through your Webflow site, update their profile through Authorize.net's updateCustomerPaymentProfile endpoint.

Recurring billing subscriptions charge customers automatically. Create subscriptions with the Recurring Billing API, specifying interval length, start date, and total occurrences. The API supports monthly, daily, and custom interval billing cycles.

Webhook events notify your application when subscription payments succeed or fail. Configure webhooks through the Webhooks API to receive real-time notifications. Listen for events like net.authorize.payment.authcapture.created and net.authorize.customer.subscription.failed to update subscription status in your Webflow CMS.

Webhook reliability has limitations during high load periods. Authorize.net retries failed webhook deliveries only 3 times at 30-second intervals before permanently dropping the notification, according to webhook documentation. Implement webhook signature validation using HMAC SHA-512 to verify authentic requests, and design your handler to respond within 10 seconds to avoid timeouts.

Syncing transaction data with Webflow CMS

Transaction monitoring synchronizes payment data with your Webflow site content. Use webhooks to receive transaction events, then update CMS items through Webflow's Data API to reflect payment status, customer purchase history, or order fulfillment state.

Webflow webhooks notify your middleware when form submissions or CMS items change. Configure webhooks with POST https://api.webflow.com/sites/:siteId/webhooks and subscribe to events like form_submission or collection_item_created. Your middleware receives these events, processes the payment through Authorize.net, and updates the CMS item with transaction results.

The Webflow CMS API manages collection items programmatically. Create items with POST /collections/:collectionId/items, update them with PUT /collections/:cid/items/:itemId, and publish changes with POST /collections/:cid/staged-items/:itemId/publish-item. Store transaction IDs, payment status, and customer details in CMS fields that your Webflow pages display.

Authorize.net webhooks send payment event notifications to your endpoint. Register webhooks through POST https://apitest.authorize.net/rest/v1/webhooks (sandbox) or the production equivalent with your API login ID and transaction key encoded as HTTP Basic Auth. Parse incoming webhook payloads that contain notificationId, eventType, and transaction details, then query Webflow's API to update corresponding CMS records.

Authentication requires different approaches for each API. Webflow uses Bearer token authentication with an Authorization: Bearer <token> header and Accept-Version: 1.0.0 to specify the API version, documented in the Data API reference. Authorize.net requires HTTP Basic Auth with Base64-encoded API credentials for webhook endpoints and merchant authentication for transaction APIs, detailed in the API authentication guide.

What you can build

Integrating Authorize.net with Webflow enables payment collection across healthcare services, digital products, subscriptions, and donation campaigns.

• Healthcare appointment booking: Medical practices embed payment forms in appointment request pages, collecting deposits or co-pays through Accept Hosted integration that meets HIPAA and PCI requirements
• Course enrollment with payment plans: Educational platforms sell courses through Webflow landing pages while processing installment payments via Recurring Billing API subscriptions
• Nonprofit donation forms: Organizations add customizable donation forms to campaign pages using Simple Checkout that redirect to secure payment pages
• Membership site access: Subscription-based content sites gate access by syncing Customer Profile API payment status with Webflow CMS collection items that control page visibility