# Track a payment link Use URL parameters and UTM codes to track a payment link. Modify your payment link with URL parameters and [Urchin Tracking Module (UTM)](https://en.wikipedia.org/wiki/UTM_parameters) codes to get insight into customer behaviors and your marketing strategy’s effectiveness. These tools help identify the source of your traffic and the marketing campaigns leading to the most conversions. ## Track campaigns with UTM codes Use UTM codes to track how customers find your site when they pay using your payment link. You can add the following UTM codes as parameters in the query string of your URL: `utm_source`, `utm_content`, `utm_medium`, `utm_term`, and `utm_campaign`. | Paramètre | Description | | -------------- | ----------------------------------------------------------------------------------------------------------------------------------------- | | `utm_source` | Identifie l’origine du trafic (par exemple, un nom de site Web, des médias sociaux ou un moteur de recherche). | | `utm_content` | Identifie le contenu choisi par votre client. Utilisez ce paramètre pour distinguer les liens qui pointent vers la même page de paiement. | | `utm_medium` | Identifie le medium marketing qui accède à votre lien de paiement (par exemple, courriel, coût par clic (cpc) ou d’autres moyens). | | `utm_term` | Identifie des termes de recherche spécifiques et des mots clés dans vos annonces de recherche payantes. | | `utm_campaign` | Identifies your marketing campaigns using the payment link URL. | To add UTM codes, specify `redirect` as your [confirmation behavior](https://docs.stripe.com/payment-links/post-payment.md#change-confirmation-behavior). When customers complete a payment, your redirect URL contains the UTM code parameters specified in your payment link URL. Here’s what a payment link looks like with an appended UTM codes: `https://buy.stripe.com/test_eVa5nPg1j1wmfXq5kr?utm_medium=earned_email&utm_source=marketo&utm_campaign=campaign_a` > Construct UTM codes using alphanumeric characters, dashes, or underscores, ensuring they don’t exceed a 150-character limit. Invalid values are discreetly discarded, guaranteeing your payment links performance remains unaffected. ## Simplify reconciliation with a URL parameter You can simplify reconciliation with the `client_reference_id` URL parameter. Use URL parameters in the query string of your payment link URL. To configure URL parameters directly in the Dashboard [Payment Links](https://dashboard.stripe.com/payment-links) page: 1. Click the payment link you want to modify. 2. Click the down arrow of the **Copy** button and select **URL parameters**. 3. In the dialog, use the drop-down menu to select **Client reference ID**. 4. Enter a value that meets the requirements described in the following table to append the reference to your URL. 5. Copy the amended URL for use in your integration. | Paramètre | Description | Syntaxe | | --------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | `client_reference_id` | Use `client_reference_id` to attach a unique string of your choice to the Checkout Session. This can be a customer ID or a cart ID (or similar), and you can use it to reconcile the Session with your internal systems. If you add this parameter to your payment link, it’s sent in the [checkout.session.completed](https://docs.stripe.com/api/events/types.md#event_types-checkout.session.completed) *webhook* (A webhook is a real-time push notification sent to your application as a JSON payload through HTTPS requests) after payment completion. | `client_reference_id` can be composed of alphanumeric characters, dashes, or underscores, and be any value up to 200 characters. Invalid values are silently dropped, but your payment page continues to work as expected. Depending on how you share your Payment Links, they might show up in unexpected places. If you add a client reference ID to a payment link, make sure that it doesn’t include sensitive information or secrets such as passwords or API keys. Only share Payment Links that have URL parameters with intended recipients. | ## Track payments with the API Lorsque les clients utilisent un lien de paiement pour effectuer un paiement, Stripe envoie un lien de rappel HTTP [checkout.session.completed](https://docs.stripe.com/api/events/types.md#event_types-checkout.session.completed) que vous pouvez utiliser pour le traitement et le rapprochement. En savoir plus sur la [réception des événements Stripe dans votre intégration](https://docs.stripe.com/webhooks.md). Veillez à écouter des liens de rappel HTTP supplémentaires au cas où vous auriez activé des modes de paiement comme les prélèvements bancaires ou les coupons, dont la confirmation de paiement peut prendre entre 2 et 14 jours. Pour en savoir plus, consultez notre guide sur [l’exécution des commandes après le paiement d’un client](https://docs.stripe.com/checkout/fulfillment.md). Une fois qu’un client a effectué un achat, vous pouvez le rediriger vers une URL ou afficher un message personnalisé en définissant le paramètre [after_completion](https://docs.stripe.com/api/payment-link/create.md#create_payment_link-after_completion) sur le lien de paiement. ```curl curl https://api.stripe.com/v1/payment_links \ -u "<>:" \ -d "line_items[0][price]={{PRICE_ID}}" \ -d "line_items[0][quantity]=1" \ -d "after_completion[type]=redirect" \ --data-urlencode "after_completion[redirect][url]=https://example.com" ```