Note: log into Okta if prompted.
Articles can be published or made available open access (OA) in three main ways:
Publishers sometimes require that authors pay an "article processing charge" (APC) to publish their articles OA, but this is far from universal. The Directory of Open Access Journals indexes OA journals that pass a set of rigorous criteria, and allow you to search for journals in your field and find more information about their OA practices.
Do a lateral search: open another tab and Google the publisher. If nothing comes up other than their own website, that's a red flag.
Based at the University of Nottingham and in association with JISC, Sherpa's databases support authors and researchers in need of information about publishers' and funders' open access policies.
The Scholarly Publishing & Academic Resources Coalition (SPARC) is an alliance of academic and research libraries organized through the Association of Research Libraries (ARL). Their Author Resources page includes the Author Addendum as well as more information about copyright and open access as it relates to academic researchers.
Below, find the PDFs of the Author Addendum and the guide on Author Rights.