Make provider and customer service agreements carry agreed terms on scope and location of services, security requirements including shared responsibility, change management, logging and monitoring, incident management and communication, right to audit and third party assessment, termination, interoperability and portability, and data privacy.
Cloud Security Alliance Cloud Controls Matrix (CCM) v4.0.1 CCM-STA-09 is one control. If you already hold one of the frameworks below, a reviewed crosswalk already says how much of Cloud Security Alliance Cloud Controls Matrix (CCM) v4.0.1 your existing evidence covers. Hold NIST SP 800-53 Rev 5 and 140 of 197 Cloud Security Alliance Cloud Controls Matrix (CCM) v4.0.1 controls already carry evidence.
Each report names every control your existing framework evidences, every one it does not, the reasoning behind each claim, and the claims that were argued against and rejected. 12 were rejected on the NIST SP 800-53 Rev 5 pair alone.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.