INAGA, also known as the Indonesian Geothermal Association (API), is a trusted partner of government, companies, and professionals in the geothermal energy business. Established in Jakarta in 1991, INAGA is a nonprofit organization that serves as a forum for communication, coordination, and consultation in order to improve the capabilities, understanding, cooperation, and responsibility of geothermal energy development in Indonesia. As a member of the International Geothermal Association (IGA), INAGA is committed to educating the public about the potential and positive values of geothermal energy, supporting the creation of conducive conditions for geothermal development efforts.

The association offers various services and resources, including a stakeholder directory, CSR initiatives, collaboration opportunities with international partners, a geothermal business directory, and a comprehensive library of technical papers, general papers, presentations, and references. INAGA also organizes events, such as the World Geothermal Congress, exhibitions, conferences, and a photo competition, to promote the advancement of geothermal energy. By bringing together industry stakeholders and promoting industry collaboration, INAGA plays a vital role in driving the sustainable development of geothermal energy in Indonesia.