Not sure where the trust claim lands, but the first two are now exceedingly trivial with code agents. A little more work perhaps, but not hard at all. I’ve done this myself (not with those providers) with several search platforms.
Instead I put my API keys to cloudflare, set limits, and gave the agent the CloudFlare token, and in minutes it could contact tens of services.
edit: not to mention instead of loading balance to each service I could just keep balance on cloudflare that covers them all
Extremely hard to verify it's been done properly across a large organization.