# Adds default value to custom fields on Payment Links ## What’s new Adds the `default_value` parameter to the existing [`custom_fields[][text]`](https://docs.stripe.com/api/payment-link/create.md#create_payment_link-custom_fields-text), [`custom_fields[][numeric]`](https://docs.stripe.com/api/payment-link/create.md#create_payment_link-custom_fields-numeric) and [`custom_fields[][dropdown]`](https://docs.stripe.com/api/payment-link/create.md#create_payment_link-custom_fields-dropdown) parameters on the [Create a Payment Link](https://docs.stripe.com/api/payment-link/create.md?api-version=2025-03-31.basil) and [Update a Payment Link](https://docs.stripe.com/api/payment-link/update.md?api-version=2025-03-31.basil) endpoints. ## Impact Payment Links users can now provide a default value when using custom fields. Default values prefill the form field on the payment page. ## Changes #### REST API | Parameter | Change | Resources or endpoints | | --------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `default_value` | Added | `PaymentLink#create.custom_fields[].dropdown`, `PaymentLink#create.custom_fields[].numeric`, `PaymentLink#create.custom_fields[].text`, `PaymentLink#update.custom_fields[].dropdown`, `PaymentLink#update.custom_fields[].numeric`, `PaymentLink#update.custom_fields[].text`, `PaymentLink.custom_fields[].dropdown`, `PaymentLink.custom_fields[].numeric`, `PaymentLink.custom_fields[].text` | #### Ruby This change does not affect the Ruby SDK. #### Python | Parameter | Change | Resources or methods | | --------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `default_value` | Added | `PaymentLink.CreateParamsCustomFieldDropdown`, `PaymentLink.CreateParamsCustomFieldNumeric`, `PaymentLink.CreateParamsCustomFieldText`, `PaymentLink.CustomField.Dropdown`, `PaymentLink.CustomField.Numeric`, `PaymentLink.CustomField.Text`, `PaymentLink.UpdateParamsCustomFieldDropdown`, `PaymentLink.UpdateParamsCustomFieldNumeric`, `PaymentLink.UpdateParamsCustomFieldText` | #### PHP This change does not affect the PHP SDK. #### Java | Parameter | Change | Resources or methods | | -------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `defaultValue` | Added | `PaymentLink.custom_fields[].dropdown`, `PaymentLink.custom_fields[].numeric`, `PaymentLink.custom_fields[].text`, `PaymentLinkCreateParams.custom_fields[].dropdown`, `PaymentLinkCreateParams.custom_fields[].numeric`, `PaymentLinkCreateParams.custom_fields[].text`, `PaymentLinkUpdateParams.custom_fields[].dropdown`, `PaymentLinkUpdateParams.custom_fields[].numeric`, `PaymentLinkUpdateParams.custom_fields[].text` | #### Node.js | Parameter | Change | Resources or methods | | --------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `default_value` | Added | `PaymentLink.custom_fields[].dropdown`, `PaymentLink.custom_fields[].numeric`, `PaymentLink.custom_fields[].text`, `PaymentLinkCreateParams.custom_fields[].dropdown`, `PaymentLinkCreateParams.custom_fields[].numeric`, `PaymentLinkCreateParams.custom_fields[].text`, `PaymentLinkUpdateParams.custom_fields[].dropdown`, `PaymentLinkUpdateParams.custom_fields[].numeric`, `PaymentLinkUpdateParams.custom_fields[].text` | #### Go | Parameter | Change | Resources or methods | | -------------- | ------ | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | | `DefaultValue` | Added | `PaymentLinkCustomFieldsDropdownParams`, `PaymentLinkCustomFieldsDropdown`, `PaymentLinkCustomFieldsNumericParams`, `PaymentLinkCustomFieldsNumeric`, `PaymentLinkCustomFieldsTextParams`, `PaymentLinkCustomFieldsText` | #### .NET | Parameter | Change | Resources or methods | | -------------- | ------ | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `DefaultValue` | Added | `PaymentLinkCustomFieldsDropdownOptions`, `PaymentLinkCustomFieldsDropdown`, `PaymentLinkCustomFieldsNumericOptions`, `PaymentLinkCustomFieldsNumeric`, `PaymentLinkCustomFieldsTextOptions`, `PaymentLinkCustomFieldsText` | ## Upgrade #### REST API 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. If you use an SDK, upgrade to the corresponding SDK version for this API version. - If you don’t use an SDK, update your [API requests](https://docs.stripe.com/api/versioning.md) to include `Stripe-Version: 2025-03-31.basil` 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Ruby 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Ruby SDK to [v15.0.0](https://github.com/stripe/stripe-ruby/releases/tag/v15.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Python 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Python SDK to [v12.0.0](https://github.com/stripe/stripe-python/releases/tag/v12.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### PHP 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your PHP SDK to [v17.0.0](https://github.com/stripe/stripe-php/releases/tag/v17.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Java 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Java SDK to [v29.0.0](https://github.com/stripe/stripe-java/releases/tag/v29.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Node.js 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Node SDK to [v18.0.0](https://github.com/stripe/stripe-node/releases/tag/v18.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### Go 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your Go SDK to [v82.0.0](https://github.com/stripe/stripe-go/releases/tag/v82.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md). #### .NET 1. [View your current API version](https://docs.stripe.com/upgrades.md#view-your-api-version-and-the-latest-available-upgrade-in-workbench) in Workbench. 1. Upgrade your .NET SDK to [v48.0.0](https://github.com/stripe/stripe-dotnet/releases/tag/v48.0.0) 1. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 1. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 1. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 1. In Workbench, [perform the upgrade](https://docs.stripe.com/upgrades.md#perform-the-upgrade). You can [roll back the version](https://docs.stripe.com/upgrades.md#roll-back-your-api-version) for 72 hours. Learn more about [Stripe API upgrades](https://docs.stripe.com/upgrades.md).