> ## Documentation Index
> Fetch the complete documentation index at: https://voucherify-pw-further-tests.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Update Vouchers in Bulk

> Updates specific metadata parameters for each code, respectively, in one asynchronous operation.

The request can include up to **10 MB** of data.

Upserts are not supported.

> 🚧
> 
> Currently, only **metadata** updates are supported.

The response returns a unique asynchronous action ID. Use this ID in the query paramater of the [GET Async Action](ref:get-async-action) endpoint to check, e.g.:

- The status of your request (in queue, in progress, done, or failed)

- Resources that failed to be updated

- The report file with details about the update



This API request starts a process that affects Voucherify data in bulk. In the case of small jobs (like bulk update), the request is put into a queue and processed when every other bulk request placed in the queue prior to this request is finished.