Oauth Scope
Provider-defined access labels that an OAuth client can request; the authorization server decides the actual grant.
Key points
- 01 A scope names a range of access defined by an authorization server, such as this example API’s notes:read permission.
- 02 An application requests scopes; the authorization server can grant a different set according to its policy and the resource owner’s instructions.
- 03 If the issued scope differs from the request, OAuth 2.0 requires the authorization server to tell the client the actual scope in its response.
- 04 Scope strings are case-sensitive and space-delimited; a label’s meaning depends on the provider that defines it.
- 05 A user consent screen is one possible interaction, not a universal step in every OAuth flow; client-credentials grants are a counterexample.
- 06 The resource server enforces access to protected resources. Requesting a scope does not prove that an API operation is allowed.
- 07 Check the actual grant and the API’s requirements instead of assuming that requested permissions were granted or are readable from the token text.
Follow the reviewed diagram below. A separate worked example is not available for this lesson yet.
Visual
sequenceDiagram participant C as Example client participant S as Authorization server participant R as Resource server C->>S: Request notes:read and notes:write Note over S: Apply the grant policy S-->>C: Token and actual grant: notes:read C->>R: Request a protected operation Note over R: Validate access against requirements
Follow the primary sources
- RFC 6749: OAuth 2.0, section 3.3 — Access Token Scope
Primary documentation supporting this written explanation.
- RFC 6749: OAuth 2.0, section 4.4 — Client Credentials Grant
Primary documentation supporting this written explanation.
Written explanation: sources and review
The summary, key points and diagram were independently compared with primary documentation using AI on 2026-10-07. The approval is bound to this written content.
This text review does not approve a video or timestamp window. Human learner validation remains pending.
Practice · predict the result
Use the scopes actually granted
A small test from your robot instructors. Hints are welcome.
What you will practice: Predict access from granted scopes rather than the application's requested scopes.
Sample scenario. Synthetic notes API. The token is otherwise valid. Scope names and endpoint requirements below are defined by this example; they are not universal OAuth permission names.
- Requested scopes
notes:read, notes:write- Granted scopes
notes:read- GET /notes
Requires: notes:read- POST /notes
Requires: notes:write
The app requested notes:read and notes:write. Its issued token grants only notes:read. Which requests pass this sample API's scope check?
Attempts stay on this browser and are kept separate from lesson views and your self-reported knowledge.
Sources and exercise scope
- RFC 6749, section 3.3: Access Token Scope
Scope strings are case-sensitive and server-defined; the granted scope may differ from the requested scope.
Original synthetic exercise, checked with AI against primary documentation on 2026-10-07. Human learner validation is pending. A result here records this attempt; it does not establish mastery.
Make this lesson yours
Save it for later, or tell your robot what would help.
This correction stays on this browser. Browse all concepts if the topic is missing.
Familiarity is your own assessment. To use it in your coding tool, download your updated learning profile.
Choices are saved on this browser. They do not sync to your account or coding tool.
Lesson diagnostics
Download the public lesson material, resource choices, and robot text selected for this page. The file does not include your chat, code, or saved profile. Nothing from the trace is uploaded.
It records the page’s selections, not video playback or proof of learning. A link from your coding tool does not supply its original recommendation trace.
Enable JavaScript to create a trace on this device.
