# Subscribe to Webhook Topic

Creates a subscription to a specific webhook topic for an existing webhook configuration. The webhook will receive notifications for events matching the specified topic.

Endpoint: POST /v1/webhook-subscribers/{id}/subscriptions
Version: v1
Security: ApiKey

## Path parameters:

  - `id` (string, required)
    ID of the resource

## Request fields (application/json-patch+json):

  - `topic` (string, required)
    The event topic for this subscription (e.g., 'project.created', 'project.updated').

## Response 201 fields (application/json):

  - `id` (string)
    The unique identifier of the webhook subscription.

  - `webhook_subscriber_id` (string)
    The unique identifier of the parent webhook subscriber configuration.

  - `topic` (string)
    The event topic for this subscription (e.g., 'project.created', 'project.updated').

  - `created_date` (string)
    The date and time when the subscription was created.

  - `modified_date` (string)
    The date and time when the subscription was last modified.

## Response 400 fields (application/json):

  - `type` (string)
    RFC reference for the error type

  - `title` (string)
    Human-readable summary of the error

  - `status` (integer)
    HTTP status code

  - `errors` (array)
    Detailed error messages for each validation failure

  - `trace_id` (string)
    Trace identifier for debugging