Format: Variable length, up to 64 AN
Description: A label to identify the webhook.
Conditional Requirement: Required for 'Add a Webhook.'

Format: Variable length, up to 256 AN
Description: The webhook endpoint to which requests will be posted. The endpoint must use HTTPS and should serve HTTP POST requests. The endpoint URL should respond with an HTTP 2xx response. Any other HTTP response message is considered a failure, and we will retry posting the same request until a successful response is received or the request expires, whichever comes first.
Conditional Requirement: Required for 'Add a Webhook.'

Format: Variable length, up to 5 AN
Description: The authentication type. By default, the authentication type is NONE. Use one of the following:

• NONE - No authentication.
• BASIC - The POST request will be secured by HTTP BASIC authentication. When auth_type is BASIC, auth_settings is required with at least one of the following fields: user_name, user_password.

Format: Variable length, up to 16 N
Description: The node at which the webhook should be created. If you use a merchant ID in this field, the webhook is created for the merchant. If this field is absent from the request, the webhook is created at the API key's node.
Conditional Requirement: This field is not applicable to the 'Update a Webhook' request. Once a webhook node is created, its value cannot be updated.