Embodiments of the present disclosure relate to a method, a device and a computer program product for service access. The method comprises receiving, from a requester, a request for accessing a first functional interface of a first service of a plurality of services. The method also comprises, in response to the request, determining a first combined permission of the requester to access a plurality of functional interfaces of the plurality of services. The method further comprises determining a second combined permission of the first service to access the plurality of functional interfaces of the plurality of services. In addition, the method comprises controlling, based on the first and the second combined permissions, access of the requester to the first functional interface. The method can accomplish rapid, safe service calling and improve service accessing efficiency.