This case study series features key findings from the 4.5-year-long Ambitious City Promises Project (ACP) that co-created climate action policies with stakeholders in Southeast Asian megacities. Three core principles guided ACP’s efforts: Inclusion, Exchange, and Action. This case study highlights both the need for inclusivity and how the Special Capital Region (DKI in Bahasa Indonesia) Jakarta’s pilot initiatives fostered bottom-up climate action. Activities targeted specific stakeholder groups who could serve as outreach conduits to inspire wider community action. These activities then informed the creation of climate action pledges in the Ikhtiar Jakarta – half of these pledges would be impossible to meet without stakeholders.