We're happy to announce that Flickr now supports OAuth! This is an open standard for authentication, which is now fully supported by the Flickr API. You can get started by going to our OAuth documentation. As part of this announcement, we would also like to note that the old Flickr authentication is now deprecated, and is expected to be disabled early 2012.
The old Flickr authentication was very similar to OAuth in a lot of ways. You start by getting a request token (frob in the old flow), redirecting the user to the authentication page, and then getting a token which can be used to make authenticated requests. With proper OAuth support, though, you will be able to use one of the many libraries available in a variety of languages to get started.
In addition to this, we have streamlined the authentication process across desktop, mobile and web, and have simplified the user experience by removing the anti-phishing step for the Desktop flow, which is no longer necessary.
Currently, weRead More »from Flickr Now Supports OAuth