Follow these steps to allow patrons to authenticate to FirstSearch directly from your library's website.
https://firstsearch.oclc.org/fsipreferer&dbname=WorldCat&screen=basic
OR
https://firstsearch.oclc.org/fsipreferer&dbname=WorldCat&screen=advanced
Note: If IP authentication fails, or is not an option, try using the username and password for authenticated linking. However, only do this if the link is being securely hosted. Replace the bolded AUTHORIZATION and PASSWORD values in the URL example below with your unique nine digit FirstSearch authorization and password.
Example:
https://firstsearch.oclc.org/WebZ/FSLogin?sessionid=0&autho=AUTHORIZATION&password=PASSWORD
More information can be found in Create IP address recognition links to FirstSearch.