# Adds a referrer parameter to Radar options on Payment Intents ## What’s new Adds an optional [referrer](https://docs.stripe.com/api/payment_intents/create.md?api-version=2026-07-29.dahlia#create_payment_intent-radar_options-referrer) parameter to [radar_options](https://docs.stripe.com/api/payment_intents/create.md?api-version=2026-07-29.dahlia#create_payment_intent-radar_options) when you [create](https://docs.stripe.com/api/payment_intents/create.md?api-version=2026-07-29.dahlia) or [confirm](https://docs.stripe.com/api/payment_intents/confirm.md?api-version=2026-07-29.dahlia) a PaymentIntent. This parameter accepts the referrer URL of the current Checkout Session and provides it to [Radar](https://docs.stripe.com/radar.md) and Supportability for risk evaluation. The referrer parameter is request-only and doesn’t appear in the PaymentIntent response or webhook events. It acts as a fallback, so if a referrer is already available from a [Radar Session](https://docs.stripe.com/radar/radar-session.md) or another source, the value you pass in [radar_options.referrer](https://docs.stripe.com/api/payment_intents/create.md?api-version=2026-07-29.dahlia#create_payment_intent-radar_options-referrer) doesn’t override it. ## Impact You can now supply per-transaction referrer data directly on PaymentIntent creation or confirmation for [Radar](https://docs.stripe.com/radar.md) and Supportability risk evaluation. Use [Radar Sessions](https://docs.stripe.com/radar/radar-session.md) to collect complete browser and device information. Use [radar_options.referrer](https://docs.stripe.com/api/payment_intents/create.md?api-version=2026-07-29.dahlia#create_payment_intent-radar_options-referrer) when a Radar Session is unavailable or doesn’t contain a referrer. If your integration previously relied on the deprecated Risk Metadata API to pass referrer information, you can use this parameter instead. ## Changes #### REST API | Parameter | Change | Resources or endpoints | | --- | --- | --- | | `referrer` | Added | [PaymentIntent#create.radar_options](/api/payment_intents/create?api-version=2026-07-29.dahlia#create_payment_intent-radar_options), [PaymentIntent#confirm.radar_options](/api/payment_intents/confirm?api-version=2026-07-29.dahlia#confirm_payment_intent-radar_options) | #### Ruby | Parameter | Change | Resources or methods | | --- | --- | --- | | `referrer` | Added | [PaymentIntentCreateParams::RadarOptions](/api/payment_intents/create?api-version=2026-07-29.dahlia#create_payment_intent-radar_options), [PaymentIntentConfirmParams::RadarOptions](/api/payment_intents/confirm?api-version=2026-07-29.dahlia#confirm_payment_intent-radar_options) | #### Python | Parameter | Change | Resources or methods | | --- | --- | --- | | `referrer` | Added | [PaymentIntentCreateParamsRadarOptions](/api/payment_intents/create?api-version=2026-07-29.dahlia#create_payment_intent-radar_options), [PaymentIntentConfirmParamsRadarOptions](/api/payment_intents/confirm?api-version=2026-07-29.dahlia#confirm_payment_intent-radar_options) | #### PHP | Parameter | Change | Resources or methods | | --- | --- | --- | | `referrer` | Added | [PaymentIntent.create().$params.radar_options](/api/payment_intents/create?api-version=2026-07-29.dahlia#create_payment_intent-radar_options), [PaymentIntent.confirm().$params.radar_options](/api/payment_intents/confirm?api-version=2026-07-29.dahlia#confirm_payment_intent-radar_options) | #### Java | Parameter | Change | Resources or methods | | --- | --- | --- | | `referrer` | Added | [PaymentIntentCreateParams.radar_options](/api/payment_intents/create?api-version=2026-07-29.dahlia#create_payment_intent-radar_options), [PaymentIntentConfirmParams.radar_options](/api/payment_intents/confirm?api-version=2026-07-29.dahlia#confirm_payment_intent-radar_options) | #### Node.js | Parameter | Change | Resources or methods | | --- | --- | --- | | `referrer` | Added | [PaymentIntentCreateParams.radar_options](/api/payment_intents/create?api-version=2026-07-29.dahlia#create_payment_intent-radar_options), [PaymentIntentConfirmParams.radar_options](/api/payment_intents/confirm?api-version=2026-07-29.dahlia#confirm_payment_intent-radar_options) | #### Go | Parameter | Change | Resources or methods | | --- | --- | --- | | `Referrer` | Added | [PaymentIntentParams.RadarOptions](/api/payment_intents/create?api-version=2026-07-29.dahlia#create_payment_intent-radar_options), [PaymentIntentConfirmParams.RadarOptions](/api/payment_intents/confirm?api-version=2026-07-29.dahlia#confirm_payment_intent-radar_options) | #### .NET | Parameter | Change | Resources or methods | | --- | --- | --- | | `Referrer` | Added | [PaymentIntentCreateOptions.RadarOptions](/api/payment_intents/create?api-version=2026-07-29.dahlia#create_payment_intent-radar_options), [PaymentIntentConfirmOptions.RadarOptions](/api/payment_intents/confirm?api-version=2026-07-29.dahlia#confirm_payment_intent-radar_options) | ## 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. 2. 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: 2026-07-29.dahlia` 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. 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. 2. Upgrade your Ruby SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. 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. 2. Upgrade your Python SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. 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. 2. Upgrade your PHP SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. 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. 2. Upgrade your Java SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. 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. 2. Upgrade your Node SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. 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. 2. Upgrade your Go SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. 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. 2. Upgrade your .NET SDK to the latest version. 3. Upgrade the API version used for [webhook endpoints](https://docs.stripe.com/webhooks/versioning.md). 4. [Test your integration](https://docs.stripe.com/testing.md) against the new version. 5. If you use Connect, [test your Connect integration](https://docs.stripe.com/connect/testing.md). 6. 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).