Climate change is almost unanimously perceived to be one of the greatest environmental and developmental challenges of this century. Implementing climate change response requires not just huge and prudent utilization of financial resources, but also highly efficient financing institutions and systems especially in developing countries where underlying development issues such as poverty, health, etc. exist. This paper attempts to evaluate the operationalization of the Indonesian Climate Change Trust Fund (ICCTF) as a climate financing prototype in terms of fund mobilization, nature of projects, equity and inclusion, alignment and mainstreaming. This study was conducted through review of relevant and recent literature on climate change governance and financing, supported with information retrieved from relevant official documents as well as interviews of key persons. Our study found the ICCTF most effective in alignment with national development plans and Sustainable Development Goals (SDGs). It has implemented climate change adaptation programmes with the principles of equity and inclusion of various stakeholders. The ICCTF has however struggled to efficiently mobilize funds owing largely to technical ambiguities especially in its legal and institutional frameworks, it therefore yet to be utilized to its maximum potentials.