Set or clear webhook URL and/or custom field names. Partial update supported; URL must use HTTPS.
field_names allowlist. Omit fields to leave them unchanged. Use url: null or empty string to clear the webhook. Single lookups can send webhook_custom_fields in POST /incentives; batch items support webhook_custom_fields per item.API key for authentication. Include your Leap API key in the x-api-key header: x-api-key: leap_live_...