The organization makes sure that what external providers supply (processes, products and services) meets requirements. It decides what controls to apply in three cases: where an external provider's products and services will be built into the organization's own; where an external provider supplies products and services straight to customers on the organization's behalf; and where the organization has decided to have an external provider perform a process. It sets and uses criteria for evaluating, selecting, monitoring the performance of and re-evaluating external providers, according to how well they can supply what is required, and it retains documented information on this work and on any resulting actions.
This control maps to 12 controls across 9 other frameworks. If you already hold one of them, the evidence you collected for it is the starting point here rather than new work.
Every mapping shown was judged rather than inferred from wording similarity, and the ones that failed review are published too. See the coverage reports and what was rejected.
The graph holds this control, the 12 it maps to, and the evidence behind each claim, over MCP and REST.