Can you index your own data with the Bing search API? This looks like it lets you run the same software that runs Bing with your own data as opposed to only what Bing has crawled. From the link:
> You can now more easily load data from Azure DocumentDB, SQL Server running in Azure VMs, and Azure SQL Database to Azure Search using new indexers. The indexer infrastructure provides a no-code solution that allows you to point Azure Search to your data store where it will ingest data as well as data changes on a scheduled basis.