> ## Documentation Index > Fetch the complete documentation index at: https://docs.classquill.com/llms.txt > Use this file to discover all available pages before exploring further. # List Registry Subjects > The subject registry visible to your org: platform subjects plus any your org created. Each entry gives the `subject_id` to send when creating questions and whether a curriculum tree exists (`GET /v1/curriculum/items?subject_id=...`). Active subjects only unless `include_inactive`. Ordered by label then id. ## OpenAPI ````yaml /openapi.json get /v1/curriculum/subjects openapi: 3.1.0 info: title: ClassQuill Public API description: >- REST API for ClassQuill tutoring organisations. Pipe your sessions, invoices, payments, tutor earnings, students, and more into your own tools. Most endpoints are reads; a focused set of writes (each gated by a *:write scope) create or update data, including creating student/tutor/parent accounts. Authenticate every request with an org API key: Authorization: Token token=cq_live_... Mint keys in the ClassQuill app under Settings → Developers. version: 1.0.0 servers: [] security: - ApiKeyAuth: [] tags: - name: General - name: Sessions - name: Tutors - name: Students & Parents - name: Billing - name: Curriculum - name: Coursework - name: Operations - name: Pricing - name: Bookings - name: Blog - name: Reports paths: /v1/curriculum/subjects: get: tags: - General summary: List Registry Subjects description: >- The subject registry visible to your org: platform subjects plus any your org created. Each entry gives the `subject_id` to send when creating questions and whether a curriculum tree exists (`GET /v1/curriculum/items?subject_id=...`). Active subjects only unless `include_inactive`. Ordered by label then id. operationId: list_registry_subjects_v1_curriculum_subjects_get parameters: - name: q in: query required: false schema: anyOf: - type: string - type: 'null' description: Case-insensitive match on the subject label. title: Q description: Case-insensitive match on the subject label. - name: has_curriculum in: query required: false schema: anyOf: - type: boolean - type: 'null' description: >- Only subjects that do (true) or do not (false) have a curriculum tree. title: Has Curriculum description: >- Only subjects that do (true) or do not (false) have a curriculum tree. - name: include_inactive in: query required: false schema: type: boolean description: Include deactivated subjects. default: false title: Include Inactive description: Include deactivated subjects. - name: limit in: query required: false schema: type: integer maximum: 100 minimum: 1 default: 100 title: Limit - name: offset in: query required: false schema: type: integer minimum: 0 default: 0 title: Offset responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/Page_RegistrySubject_' '401': description: Missing, malformed, revoked, or expired credentials. content: application/json: schema: $ref: '#/components/schemas/ApiError' '403': description: The credential lacks the scope this endpoint requires. content: application/json: schema: $ref: '#/components/schemas/ApiError' '422': description: Validation error — `error.details.errors` lists the fields. content: application/json: schema: $ref: '#/components/schemas/ApiError' '429': description: >- Rate limit exceeded — honour Retry-After and the RateLimit-* headers. content: application/json: schema: $ref: '#/components/schemas/ApiError' components: schemas: Page_RegistrySubject_: properties: data: items: $ref: '#/components/schemas/RegistrySubject' type: array title: Data meta: $ref: '#/components/schemas/PageMeta' type: object required: - data - meta title: Page[RegistrySubject] ApiError: description: Canonical error envelope for every /v1 error response (4xx/5xx). properties: error: $ref: '#/components/schemas/ApiErrorBody' required: - error title: ApiError type: object RegistrySubject: properties: subject_id: type: string title: Subject Id description: Send as `subject_id` when creating questions. label: anyOf: - type: string - type: 'null' title: Label description: Display name of the subject. curriculum_code: anyOf: - type: string - type: 'null' title: Curriculum Code is_platform: anyOf: - type: boolean - type: 'null' title: Is Platform description: >- True for a platform subject, false for one your organisation created. has_curriculum: anyOf: - type: boolean - type: 'null' title: Has Curriculum description: >- True when the subject has a curriculum tree to browse via `GET /v1/curriculum/items`. type: object required: - subject_id title: RegistrySubject description: A subject from the registry, as listed by `GET /v1/curriculum/subjects`. PageMeta: properties: limit: type: integer title: Limit offset: anyOf: - type: integer - type: 'null' title: Offset count: anyOf: - type: integer - type: 'null' title: Count total: anyOf: - type: integer - type: 'null' title: Total next_cursor: anyOf: - type: string - type: 'null' title: Next Cursor description: >- Cursor-mode only: pass as ?cursor= to fetch the next page; null when this is the last page. type: object required: - limit title: PageMeta description: |- Pagination envelope metadata. `count` is the size of the returned page; `total` (when present) is the full result-set size for offset paging. In cursor mode `offset`/`total` are absent and `next_cursor` carries the opaque token for the next page (null on the last page). ApiErrorBody: description: The `error` object every /v1 error response carries. properties: code: description: >- Stable machine-readable error code: bad_request, unauthorized, forbidden, not_found, conflict, validation_error, rate_limited, or internal_error. examples: - not_found title: Code type: string message: description: Human-readable explanation, safe to surface to end users. examples: - Session not found title: Message type: string status: description: The HTTP status code, repeated in the body. examples: - 404 title: Status type: integer details: additionalProperties: true description: >- Error-specific context. 422 carries the field errors under `errors`; 429 carries `retry_after_seconds`. title: Details type: object required: - code - message - status title: ApiErrorBody type: object securitySchemes: ApiKeyAuth: type: apiKey in: header name: Authorization description: Org API key as `Token token=cq_live_...` ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.