Software is incrementally evolved as various new feature requests are implemented by software developers to meet users’ requirements. To accelerate the incoming feature implementation,developersoftenutilizeexistingthird-partyAPIs that encapsulate feature-related functionality into simple APIs. However, it is non-trivial for developers to choose which APIs to use and where to use them in a target program since the search space of APIs and their usage locations are usually large. In this paper, we introduce a tool, MULAPI, to facilitate the decision of suitable APIs at potential usage locations for implementing the incoming feature requests during software evolution. MULAPI combines feature localization and information retrieval (IR) techniques to accomplish API recommendation and usage location. Empirical studies demonstrate that MULAPI can effectively recommend correct APIs and their usage locations with higher precision than state-of-the-art approaches, thus improving the efficiency to accomplish the incoming feature request. The video of our demo is available at https://youtu.be/s3Cs5ltqdvs.