An annotation data file in one of the supported custom track formats may be uploaded by any of the following methods:

If a login and password is required to access data loaded through a URL, this information can be included in the URL using the format protocol://user:password@server.com/somepath. Only Basic Authentication is supported for HTTP. Note that passwords included in URLs are not protected. If a password contains a non-alphanumeric character, such as @, the character must be replaced by the hexidecimal representation for that character. For example, in the password mypwd@wk, the @ character should be replaced by %40, resulting in the modified password mypwd%40wk.