Bing Search API Transaction Counting For Composite Queries

Question

Does a composite query count as 1 transaction or multiple transactions? 

For example is the below query 1 transaction or 6?

https://api.datamarket.azure.com/Bing/Search/Composite?Sources=%27web%2bimage%2bvideo%2bnews%2bspell%2brelatedsearch%27&$format=json&Query=example

Answer 1

1 transaction.

Every HTTP call with 200 response status code is 1 transaction.

But if you follow the next link explicitly/implicitly, it will cost extra transactions for each response. You can use fiddler to see how many http call your code made.