The Health Online Service Provision Index (HOSPI) is an instrument to assess and monitor hospitals’ websites. The index comprises four criteria—Content, Services, Community Interaction and Technology Features—each with a subset of indicators and sub-indicators. HOSPI was applied to the Portuguese hospitals’ websites in 2023, originating the dataset described in this article. The article also provides a detailed account of the data collection process, which involved direct observation of the websites and specific treatment methods, ensuring the reliability and validity of the dataset. It underscores the relevance of having this data available and how it can improve service provision online in health facilities and support policymaking.