Welcome to the Bitly API! If you're looking to create Bitlinks, bundles, or retrieve link-level or user-level analytics programmatically, you've come to the right place.
If all you're looking to do is create Bitlinks on behalf of a single user or site, you can call the Bitly API's /v3/shorten method using your generic oauth token which you can you can generate here by confirming your account password at the bottom of the page.
If you are looking to work with multiple end-users, or to pull any information on a user level for your own account (including Bitlink history, bundle history, and/or analytics), you'll need to register an application with us to authenticate with our API.
Once you've registered an app with us, you can check out some libraries and tools for interacting with the Bitly API via a number of popular programming languages, or proceed to the API documentation directly.
If you're looking for some help getting started with the Bitly API, feel free to reach out to the API developer community with any questions!