v1.78.0 (February 2, 2026)

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New Features

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1. Communication Preferences

• Revamped email designs: Fresh, modern email templates with clear calls-to-action and improved readability
• Push notifications: Get instant alerts on your mobile device for critical events like new sales, disputes, and payouts
• Granular controls: Choose exactly which events trigger notifications and through which channels
• Multi-email support: Add multiple email addresses to receive notifications
• Customer email preferences: Configure which emails your customers receive

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2. Custom Fields in Checkout Sessions

const session = await client.checkoutSessions.create({
  product_cart: [{ product_id: 'pdt_123', quantity: 1 }],
  custom_fields: [
    {
      key: 'company_name',
      label: 'Company Name',
      field_type: 'text',
      required: true
    },
    {
      key: 'team_size',
      label: 'Team Size',
      field_type: 'dropdown',
      options: ['1-10', '11-50', '51-200', '200+'],
      required: true
    },
    {
      key: 'newsletter',
      label: 'Subscribe to our newsletter',
      field_type: 'boolean',
      required: false
    }
  ],
  return_url: 'https://yoursite.com/success'
});

• Flexible data collection: Gather any information needed for fulfillment or personalization
• Validation built-in: Email and URL fields automatically validate input format
• Required/optional control: Mark fields as required or optional based on your needs
• Webhook delivery: Custom field values are included in payment webhook events

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3. Expanded Checkout Language Support

const session = await client.checkoutSessions.create({
  product_cart: [{ product_id: 'pdt_123', quantity: 1 }],
  customization: {
    force_language: 'ko' // Force Korean language
  },
  return_url: 'https://yoursite.com/success'
});

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4. General Bug Fixes and Enhancements