# Replace all line item attributes in bulk across subscription contracts

This API replaces all existing attributes for the specified line items within subscription contracts. Use carefully, as any attributes not included in the request will be removed.

Endpoint: PUT /api/external/v2/subscription-contracts-bulk-update-line-item-attributes
Version: 0.0.1

## Header parameters:

  - `X-API-Key` (string, required)
    API Key for authentication

## Query parameters:

  - `contractIds` (string)
    Optional comma-separated list of subscription contract IDs to update. Example: 32665403611,3266540311,326654036123. Ignored if allSubscriptions=true.

  - `allSubscriptions` (boolean)
    If true, updates all active subscriptions of the shop. If false (default), updates only the provided contractId or contractIds.

## Request fields (application/json):

  - `key` (string)

  - `value` (string)