Certainly! To pass additional data to a webhook when the registration flow is completed in Ory, you can use the

transient_payload

field. This field allows you to send extra, non-persisted data to your webhook, which can then be accessed in your webhook's Jsonnet template via the

ctx.transient_payload

object. Example: 1. Submitting the registration flow with additional data: When you submit the registration flow, include the

transient_payload

field in your request. For example, using cURL:

bash curl -X POST \     -H 'Content-Type: application/json' \     -H 'Accept: application/json' \     -d '{       "method": "password",       "csrf_token": "your-csrf-token",       "traits.email": "<mailto:email@example.com|email@example.com>",       "password": "verystrongpassword",       "traits.tos": "true",       "transient_payload.consents": "newsletter,usage_stats"     }' \     -b cookies.txt \     -c cookies.txt \     "https://$<http://PROJECT_SLUG.projects.oryapis.com/self-service/registration?flow=<your-flow-id|PROJECT_SLUG.projects.oryapis.com/self-service/registration?flow=<your-flow-id>>"

This sends the

transient_payload.consents

value along with the registration request. This data will be forwarded to any configured webhooks but will not be persisted by Ory [Submit registration flow](https://www.ory.sh/docs/kratos/bring-your-own-ui/custom-ui-basic-integration#submit-registration-flow). 2. Webhook configuration to receive the additional data: In your webhook's Jsonnet template, you can access the additional data via

ctx.transient_payload

. For example:

jsonnet function(ctx) {   user_id: ctx.identity.id,   consents: ctx.transient_payload.consents }

This template will include both the user's ID and the additional

consents

data in the webhook request body [Define HTTP request](https://www.ory.sh/docs/guides/integrate-with-ory-cloud-through-webhooks#define-http-request). Summary: - Add your extra data to the

transient_payload

field when submitting the registration flow. - Access this data in your webhook using

ctx.transient_payload

in your Jsonnet template. This approach is documented and supported in Ory [Passing additional data on registration](https://www.ory.sh/docs/guides/integrate-with-ory-cloud-through-webhooks) and [transient_payload field usage](https://github.com/ory/network/issues/187).