Mentoring plays a crucial role in increasing the attractiveness of primary care careers for medical students. Based on a literature review and structured group discussions, the authors developed a primary care mentoring platform centred on undergraduate medical students' needs. All second- to sixth-year students were invited to enrol into the programme by choosing a mentor from an online platform, which was pilot tested during one academic year (2021-2022) with 16 mentors. Fifteen mentees enrolled into the pilot programme. The evaluation assessed the procedures' feasibility as well as the student-centeredness and acceptability of the programme. Mentees completed a quantitative survey evaluating satisfaction and the mentoring relationship's personal and content aspects. Mentors' feedback was collected during focus groups discussing the programme's acceptability and practical aspects. Both mentees and mentors expressed high levels of satisfaction with the programme. Mentees rated their mentoring relationships highly across most aspects. Mentees' content-related needs included postgraduate training, meeting an inspiring person, work-life balance, and questions about running a private practice. Mentors described the programme as a rewarding experience. They enjoyed the flexible structure that allowed them to adapt to the mentees' individual needs. Maintaining the relationship was mostly the mentors' responsibility. Further structured guidance from the programme coordinators was identified as potentially beneficial for future implementation. The findings highlight the feasibility and the advantages of a flexible, student-centred mentoring programme. The programme attracted students interested in primary care from all levels of undergraduate education. Such programmes may contribute to fostering students' interest in primary care careers.