> ## Documentation Index
> Fetch the complete documentation index at: https://docs.dodopayments.com/llms.txt
> Use this file to discover all available pages before exploring further.

# v1.66.0 (December 8, 2025)

> Subscription.updated webhook, minimal address checkout, read-only API keys, UPI AutoPay & RuPay subscriptions for all businesses

## New Features 🚀

1. **`subscription.updated` Webhook**\
   A new webhook event that fires on every subscription object update, giving you real-time notifications about any changes to your subscriptions.

   Use this webhook to:

   * Get instant notifications when subscription details change
   * Keep your application state synchronized with Dodo Payments
   * React to subscription updates without polling the API

   <Tip>
     Subscribe to `subscription.updated` to eliminate the need for polling and keep your system in sync with real-time subscription changes.
   </Tip>

   Learn more: [Subscription Webhooks](/developer-resources/webhooks/intents/subscription)

2. **Minimal Address Support in Checkout**

   <Frame>
     <img src="https://mintcdn.com/dodopayments/7dyPZdWH7JucnLrT/images/changelog/minimal-address.png?fit=max&auto=format&n=7dyPZdWH7JucnLrT&q=85&s=cd0e5d6f8c32e052c7ab93a88d841fb8" alt="Minimal Address Support in Checkout" style={{ maxHeight: '500px', width: 'auto' }} width="1459" height="817" data-path="images/changelog/minimal-address.png" />
   </Frame>

   Reduce checkout friction with the new minimal address collection mode. Instead of collecting full address details, minimal address mode only collects:

   * **Country**: Always required for tax determination
   * **ZIP/Postal code**: Only collected in regions where it's necessary for sales tax, VAT, or GST calculation

   <Check>
     Result: Significantly faster checkout completion with fewer form fields for customers.
   </Check>

   **Enable minimal address:**

   <Tabs>
     <Tab title="Checkout Sessions">
       ```javascript theme={null}
       const session = await client.checkoutSessions.create({
         product_cart: [{ product_id: 'prod_123', quantity: 1 }],
         minimal_address: true
       });
       ```
     </Tab>

     <Tab title="Static Payment Links">
       Append `minimalAddress=true` to your payment link URL:

       ```
       https://checkout.dodopayments.com/buy/prod_123?minimalAddress=true
       ```
     </Tab>
   </Tabs>

   <Info>
     By default, checkout continues to collect complete addresses. We'll gradually transition all checkout links to minimal address mode. Enable the feature flag now to start benefiting from reduced checkout friction.
   </Info>

3. **Read-Only API Keys**\
   Create API keys with read-only permissions for safer integrations. When creating a new API key, uncheck **Enable write access** to create a read-only key.

   Read-only keys can:

   * Fetch payment, subscription, and customer data
   * List products and retrieve details
   * Access reports and analytics

   Read-only keys **cannot**:

   * Create or modify payments
   * Update subscriptions
   * Change product configurations

   <Tip>
     Uncheck "Enable write access" for dashboard integrations, analytics tools, and any system that only needs to view data without making changes.
   </Tip>

4. **UPI AutoPay & RuPay Card Subscriptions - Full Rollout**\
   UPI AutoPay and RuPay card subscriptions are now available for all businesses. This enables recurring payments for Indian customers with:

   * **UPI AutoPay**: Automated recurring charges via UPI mandate
   * **RuPay Cards**: Subscription support for India's domestic card network

   <Check>
     Result: Expanded subscription payment options for the Indian market with RBI-compliant mandate handling.
   </Check>

   Learn more: [Subscriptions with RBI-Compliant Mandates](/features/subscription#subscriptions-with-rbi-compliant-mandates)

5. **Plan Change Preview API**\
   A new API endpoint to preview subscription plan changes before committing to them. Get the exact charge amount and see how the subscription will look after the change - without making any actual modifications.

   ```javascript theme={null}
   const preview = await client.subscriptions.previewChangePlan('sub_123', {
     product_id: 'prod_pro_plan',
     proration_billing_mode: 'prorated_immediately',
     quantity: 1
   });

   console.log('Charge amount:', preview.immediate_charge.summary);
   console.log('New plan details:', preview.new_plan);
   ```

   Use this to:

   * Show customers exactly what they'll pay before confirming upgrades/downgrades
   * Build pricing calculators and plan comparison tools
   * Reduce support tickets by improving pricing transparency

   Learn more: [Preview Plan Change API](/api-reference/subscriptions/preview-change-plan)

6. **General Bug Fixes and Enhancements**\
   This release includes UI polish, performance improvements, and resolves minor bugs for a more reliable, streamlined experience.