Building healthcare software usually means assembling a FHIR data store, an identity provider, audit logging, and clinical interfaces before any product code gets written, and Medplum ships all of it as one open-source platform. Every clinical record, from patients and encounters to observations, medications, and appointments, lives in a standards-based repository you can query through REST and GraphQL APIs with full search parameters. Sign-in and permissions come built in through OAuth, OpenID Connect, and SMART-on-FHIR, with access policies that control read and write rights down to the resource, compartment, and field level. The included web app lets your team browse and edit any resource, manage project users, clients, bots, and secrets, and review a complete audit trail where every read, write, and login is recorded. Bots run your TypeScript logic inside the platform when resources change, on schedules, or over HTTP, handling jobs like HL7 transforms, eligibility checks, and notifications without another server to operate. Subscriptions push real-time events to your services through webhooks or WebSockets with retries and signing, and projects partition data so each clinic or customer stays isolated on one deployment. Clinicians get ready-made interfaces for charting, scheduling, eligibility, and billing that you can fork and rebrand, while patients reach their records through portals and SMART health links. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. Apache-2.0 licensed.