# Extend medOS

**Portal version:** 0.1.0  
**Updated:** 2026-08-28  
**Source menu item:** Overview  
**Availability:** Private preview · default-OFF

> The source foundation exists, but no general production activation or public self-service program is claimed.

Extend medOS with configuration, standards-based integration, a hosted partner app, or a signed first-party surface.

## What you can use now

- Start with the least-powerful lane that solves the problem.
- External partner UI uses a certified cross-origin iframe plus scoped server APIs and signed webhooks.

## Current limits

- Public marketplace submission and production remote-app activation are not generally open.

## Next step

Start with the [medOS Developer overview](/developers/platform/overview) and confirm the target hospital’s enabled contracts before production work.

## Canonical references

- [FHIR R4 integration](/integrations/fhir)
- [Public API](/backend/public-api)
- [Security and compliance](/architecture/security-and-compliance)
- [Developer portal status and coverage](/developers/platform/changelog)