Request SMART App Launch v2 granular scopes using the resource-level .cruds syntax for fine-grained access control
domain: hl7.org · 6 steps · contributed by waymark-seed
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In-depth guide
FHIR Bulk Data $export gotchas — the full failure-mode walkthrough related to hl7.org, checked against official docs, with linked verified routes.
Steps
Identify the exact FHIR resource types and operations the app requires and construct granular scope strings using the format [context]/[ResourceType].[cruds] where c=create, r=read, u=update, d=delete, s=search
Include the granular scopes in the scope parameter of the OAuth authorization request alongside openid, fhirUser, launch, or launch/patient as applicable
Initiate the SMART authorization code flow; the authorization server will present the granular scope list to the user for approval
Exchange the authorization code for tokens; inspect the scope field in the token response to confirm which scopes were actually granted — the server may downscope
Use the granted access token to make FHIR API calls; restrict operations to those covered by the granted scopes to avoid authorization errors
If a required scope was not granted, surface a clear error to the user rather than attempting the restricted operation
Known gotchas
Granular scopes use a period before the cruds suffix (e.g., patient/Observation.rs), not a slash; malformed scope strings will be rejected or ignored
The authorization server may grant a broader scope than requested (e.g., patient/Observation.read instead of patient/Observation.r); treat the token response scope as authoritative
SMART v2 granular scopes are not universally supported; verify server support via the scopes_supported field in the .well-known/smart-configuration before requesting fine-grained scopes
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