CSPs’ vertical industry customers of autonomous network features are primarily concerned with cloud network private line services such as e-commerce subscriptions, intelligent cloud access elastic bandwidth, deterministic SLAs, customer-level assurance, and security. The objectives of this Catalyst project are to improve the cloud network experience of vertical users, guide the evolution of autonomous network capabilities of carriers' cloud-network synergy to L3 and L4, streamline the "three-layer and four-loop" of the autonomous network, and facilitate future development to intent APIs (L4 to L5) and further research. To achieve these objectives, the project will verify the E2E network service capabilities of carriers' OSS, OMC, and devices by black-box evaluating the cloud-network service experience. This is a key attempt to streamline the "three-layer and four-loop" of the autonomous network. Invoking and testing northbound APIs between operators' OSSs and OMCs/devices is the key to cross-layer collaboration of autonomous network capabilities. This will facilitate future development to intent APIs (L4 to L5) and further research.