Microsoft has launched their Bing Search API on the Windows Azure Marketplace.
The API offer 5000 queries for free per month. Developers requiring more would have to pay for additional usage.
The company said in a statement:
Right now, we’re offering a free limited time trial for any subscription tier to help in the transition process. We encourage existing developers to begin transitioning to the Windows Azure Marketplace before Bing Search API 2.0 AppIDs are decommissioned on August 1, 2012. On and after this date, AppIDs will no longer return results.