Microsoft a month ago announced that it will begin charging for Bing Search API access. The company started offering the services on a subscription model and will starts at roughly at $40 for up to 20,000 queries. Bing Search API 2.0 will be free during a transition period which last several months. The subscriptions will be offered through the Windows Azure Marketplace, where developers have a choice to try the new version of the API for free right now.
For developers who need more than 5,000 queries, pricing starts at $20 per month for 10,000 queries and increases all the way up to the top tier of 2.5 million queries for $5,000 month. The API gives developers access to web, image, news and video search results. There is also a cheaper web results-only version of the Bing API that starts at $13 per month for 10,000 queries.