This study comprises a systematic review and metasynthesis of qualitative literature on national and international databases to identify the main tools used to assess Primary Health Care (PHC). A total of 3,048 results were returned for literature written in Portuguese, Spanish and English published between 1979 and 2013. Thirty-three articles/studies were selected after thorough reading and analysis. Eight of these studies addressed the use of one or more of the following validated PHC assessment tools: the WHO Primary Care Assessment Tool (PCET); the ADHD Questionnaire for Primary Care Providers (AQ-PCP); the General Practice Assessment Questionnaire (GPAQ), PACOTAPS (primary health care software); and the PCAT (Primary Care Assessment Tool). The study showed that the majority of these tools were used internationally. The PCAT and EUROPEP were used in Brazil and the most commonly used tool in this country was the PCAT. The results show that the use of research tools to assess PHC may assist in the creation of new proposals to improve family healthcare and that PCAT is the most adequate tool for this purpose.