The role of the Telco is rapidly moving away from traditional business models and focus areas towards a holistic, end-to-end solution provider for all aspects of the connected business. APIs are the fundamental building blocks for this new telco revolution; be it a singular identity model verified by the telco, a global set of telco API standards such as GSMA OneAPI, or a set of services exposed by Internet of Things style devices, API monetisation is fast becoming the business of choice for telcos. This also leads to massive collaboration between telcos, partners, stakeholders and the long tail. With the right building blocks, federation models, global standards and ultimately APIs, a mobile developer can now build apps that work with telcos and across telcos, covering the entire globe. In this session, Director - Solutions Architecture at WSO2, Mifan Careem looked at how telcos can accelerate their digital strategies by building an effective Developer API ecosystem that encourages participatory business models leading to APIs as the currency for a digital economy. The session was presented at APIdays Sydney 2015.