This new tool, designed by DIAMAS to promote quality in Diamond open access OA publishing, enables publishers to evaluate their compliance with high-quality Diamond OA standards, providing a clear pathway to enhancing their publishing practices. Institutions can use this resource to identify strengths and weaknesses, facilitating improvement towards Diamond OA-level publishing standards. Serving as both a technical guide and a practical benchmarking resource, DOAS combines comprehensive guidelines with a self-assessment tool to elevate standards in scholarly publishing. The presentation was delivered at an online workshop organised by for UK and Irish open access publishers on Tuesday, 5 November (3 - 4.30 p.m.). It was a hands-on session where attendees received expert guidance and support completing the Diamond OA Standard (DOAS) self-assessment tool. Members of the DIAMAS team were on hand to answer questions about DOAS and troubleshoot any issues attendees are experiencing. The newly launched multi-lingual toolsuite, including guidelines, was also promoted to attendees.