Digits Core Service is the Clinical API Layer

For most of modern healthcare IT, shipping a new clinical capability meant assembling three very different things yourself. You built the model. You secured the regulatory clearance. You built the distribution. Each effort moved on a different clock, required a different team, and consumed a different kind of capital. The fragmentation is most of why healthcare innovation moved slowly for so long.

Those layers are now collapsing into a single product — packaged intelligence, validation, regulatory wrapper, and access layer, delivered together as something another company can directly embed. A pharmacy app no longer needs to become a hand-therapy company to triage hand pain. A hospital platform does not need an internal computer-vision team to ship ROM measurement. An EHR vendor does not need to spend five years training pose-inference models from scratch. They can rent the capability instead, and increasingly they do.

Digits is not trying to own the patient-facing UI in every market it serves. The web and Android apps are reference experiences — proof that the stack works end-to-end and a direct channel for patients and clinics that want it. But the structural product is Digits Core Service (DCS): a clinically validated, regulator-aware API that turns a phone camera into a hand-assessment instrument and exposes the output as structured medical data.

DCS bundles four things into a single integration: the kinematic intelligence (MediaPipe-driven ROM, dexterity, grip, swelling, tremor, pain scoring), the validation evidence (the Digits Research Connect pipeline that ingests video and produces FHIR-mapped outputs), the regulatory wrapper (clearance posture, audit, consent, PHI controls), and the developer surface (REST + WebSocket APIs, SDKs, Code Connect). One bundle, embedded once, governed once.

The pattern is the same one Corti runs for medical speech, Autoderm runs for dermatology triage, and Infermedica runs for symptom checking. The partner keeps the brand, the workflow, and the customer relationship. Digits Core Service provides the regulated hand-assessment capability they cannot economically build themselves.

Within a single quarter, OpenAI launched ChatGPT Health, Anthropic launched Claude for Healthcare, and AWS launched Amazon Connect Health. All three entered with compliant infrastructure, EHR connectivity, and enterprise customers attached to the launch. Generic compliant inference is becoming abundant fast. The floor of the market just rose.

That changes where defensibility lives. It is no longer the wrapper. It is the things that cannot be conjured by a frontier lab in ninety days:

The category still does not really have a clean name. Healthcare AI infrastructure, clinical AI APIs, AI as a service — none of those quite capture what makes this layer structurally different. The defining characteristic is the bundle: intelligence, validation, regulatory wrapper, and access surface, delivered together as something another company can directly embed. Sold once. Integrated once. Governed once.

That is what we mean when we say Digits Core Service is the Clinical API Layer for the hand. Not that we have an API — anyone can ship an API. That the hand is finally becoming programmable as a clinically trusted primitive, and Digits is positioned to be the substrate that the rest of healthcare rents when they need it.