Batch API for Blob Storage

Batch API for Azure Blob Storage preview simplifies development of your applications that make several concurrent API requests to Blob storage. Batch API reduces the number of connections a client has to open, manage and distribute the requests to by allowing multiple API calls to be embedded into a single HTTP request.
Currently the API supports two types of sub-requests: SetBlobTier for Block Blobs and DeleteBlob, with more requests to follow. This API is available starting version 2018-11-09.
Source: Azure Roadmap