The API Works. The Network Is What Makes CMS-0057 Matter.

For health plans preparing for CMS-0057, standing up secure APIs is only one part of the work. The larger challenge is making those APIs exchange data with organizations outside the plan’s own environment — securely, reliably, and at scale.

Mark’s point here is really about trust. Secure APIs require registration — which means every organization on the other end needs a reason to trust the connection before any data moves. Without a network that already has those trust relationships established, every new connection becomes its own one-off negotiation: manual, slow, and expensive to repeat.

That’s the difference between being technically connected and actually exchanging data. One is a capability. The other is infrastructure that scales.

Health plans that get this right aren’t building point-to-point connections one at a time. They’re participating in a network that turns every future integration — for CMS-0057 today, and whatever comes next — into something repeatable instead of something rebuilt from scratch.

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Onyx helps health plans build the data foundation that powers continuous compliance — so every new CMS mandate strengthens rather than strains your operations. Our CMS Readiness Check identifies gaps across APIs, data readiness, workflow alignment, vendor handoffs, governance, testing, and operational execution.