Getting Access to the Bing Webmaster Tools API
Webmasters are able to generate an API key from Bing Webmaster API to allow them to connect and get information from Bing Webmaster website such as “Impressions” and “Clicks”.
Getting your API Key
To be able to get your Webmaster API Key, follow the steps below:
Sign into your Bing Webmaster account at http://www.bing.com/webmaster with your LiveID. If you do not already have a LiveID you can get one by clicking "Sign up with Windows LiveID”
If you have no verified sites, please add and verify one. Then click on any site and select Webmaster API on the left hand side.
Read the Terms and Conditions if not done so already
Select on Generate to create an API Key. You only get 1 API key at a time
Lost or Compromised API Key?
Do not give out your API key to any 3rd party or anyone you do not trust. If you feel the key has been compromised or used by an unauthorized party you can create a new key by deleting your current one and clicking generate. Note that if you delete your key all applications tied with this key will no longer function and need to be updated with the new API key that was generated for you.