CloudFlare is a content delivery network that both increases website performance through faster load times and provides security. It provides developers with a Client Interface API that is used to check or modify the settings of a CloudFlare account. Developers can use the API to update CloudFlare Settings like DNS record, threat control listings, Security Level, Cache Purge, Development Mode. It also allows users to retrieve basic statistics for their website, retrieve the settings for features such as security level, toggle on and off the development mode feature to temporarily bypass the CloudFlare cache, change the current security level, request a purge of the CloudFlare cache, check whether a particular website/domain is associated with an account. The API uses HTTP calls and responses are formatted in JSON or JSONP.