> ## Documentation Index > Fetch the complete documentation index at: https://developers.primulamanagement.com/llms.txt > Use this file to discover all available pages before exploring further. # Get a sibling discount entry > The student UUID identifies the entry. Requires schools assigned to the session. Collection filters do not apply. A student outside the session schools returns 403; no applicable entry returns 404. ## OpenAPI ````yaml /openapi.yaml get /sibling_discounts/{student_id} openapi: 3.1.0 info: title: Primula Tracker API V3 version: 3.0.0 description: >- Reference for the 66 operations registered under `/primula/api/v3` in the V3 release baseline. ## Authentication Create a session with `POST /sessions`, then send `Authorization: Bearer ` on protected operations. Tokens must remain associated with a valid server-side session. The returned refresh token has no refresh endpoint in V3. Session company and school restrictions are documented per operation; company_id is not inferred from the token. ## Responses and errors Collections generally return bare JSON arrays and items return bare JSON objects. Report objects, nested maps, and update summaries are explicitly described below. List metadata travels in response headers rather than an envelope. Empty lists written by collection helpers are `[]`; fields backed by nullable values may be `null`, and omitted properties are distinguished from null properties in schemas. Handlers generally return `{ "error": "message" }`; authentication middleware and activity proxy errors use plain text. Unsupported methods on a registered path return 405 with Allow after any applicable authentication checks. ## Pagination and projections Only operations documenting page/per_page support pagination. Defaults are page=1 and per_page=100. Values exceeding the documented effective cap are clamped, not rejected. X-Total-Count describes the full matching set. Link contains applicable navigation links and is omitted for a single page. Aggregates use limit (default 50, effective cap 200) instead of pagination and send X-Truncated only when rows were omitted. The fields parameter, where available, selects the exact response properties; unsupported fields return 400. ## Query encoding Multi-value parameters documented as arrays accept repeated keys or comma-separated values. Prefer repeated keys for long UUID lists. Except for the two activity proxy operations, query parsing drops the entire query string above 8192 bytes and truncates each decoded query value to 128 bytes. Parameter combinations and interpretation differ by resource and representation; consult each operation. Unknown parameters are rejected only where explicitly documented. ## Dates and writes Calendar dates use YYYY-MM-DD, monthly periods use YYYY-MM, and timestamp formats are described in the corresponding schema. Defaults such as today depend on the server clock. PATCH operations change only the documented properties and reject unknown body properties. Clearing values, authorization, and partial-write behavior vary by resource and are described per operation. Examples use synthetic identifiers and placeholder tokens. Replace the server host before using an interactive API client. servers: - url: https://{host}/primula/api/v3 description: V3 API deployment. Replace the placeholder hostname. variables: host: default: api.example.com security: - bearerAuth: [] tags: - name: sessions description: Sessions. - name: schools description: Schools. - name: companies description: Companies. - name: rooms description: Rooms. - name: users description: Users. - name: gusto_companies description: Gusto companies. - name: gusto_employees description: Gusto employees. - name: gusto_contractors description: Gusto contractors. - name: gusto_payrolls description: Gusto payrolls. - name: procare_staff description: Procare staff. - name: efficiency_ratios description: Efficiency ratios. - name: enrollment_tracker description: Enrollment tracker. - name: classroom_attendance description: Classroom attendance. - name: absences description: Absences. - name: billing_attendance_audits description: Billing attendance audits. - name: data_refresh description: Data refresh. - name: waitlist description: Waitlist. - name: sibling_discounts description: Sibling discounts. - name: new_start_tracker description: New start tracker. - name: withdrawal_tracker description: Withdrawal tracker. - name: transition_tracker description: Transition tracker. - name: enrollments description: Enrollments. - name: pre_registration_fallout description: Pre registration fallout. - name: procare_messages description: Procare messages. - name: activities_summary description: Activities summary. - name: activity_details description: Activity details. - name: leads description: Leads. - name: students description: Students. - name: payments description: Payments. - name: family_balances description: Family balances. - name: attendances description: Attendances. - name: billing_plans description: Billing plans. - name: spaces description: Spaces. paths: /sibling_discounts/{student_id}: get: tags: - sibling_discounts summary: Get a sibling discount entry description: >- The student UUID identifies the entry. Requires schools assigned to the session. Collection filters do not apply. A student outside the session schools returns 403; no applicable entry returns 404. operationId: GetSiblingDiscountsStudentIdV3 parameters: - name: student_id in: path required: true description: UUID identifying this student. schema: type: string format: uuid - $ref: '#/components/parameters/CompanyId' responses: '200': description: Successful response. content: application/json: schema: $ref: '#/components/schemas/SiblingDiscount' '400': $ref: '#/components/responses/400' '401': $ref: '#/components/responses/401' '403': $ref: '#/components/responses/403' '404': $ref: '#/components/responses/404' '405': $ref: '#/components/responses/405' '500': $ref: '#/components/responses/500' components: parameters: CompanyId: name: company_id in: query required: true description: >- Company UUID. Must equal the authenticated session company when that session has a company assigned; the equality check is skipped for sessions without one. schema: type: string format: uuid example: 11111111-1111-4111-8111-111111111111 schemas: SiblingDiscount: type: object properties: school_id: type: string description: School id. school_name: type: string student_id: type: string description: Student id. student_first_name: type: string student_last_name: type: string student_name: type: string family_id: type: string description: Family id. status: type: string dob: type: string start_date: type: string withdrawal_date: type: string graduation_date: type: string room: type: string room_id: type: string description: Room id. ems_student_status: type: string program: type: string tuition_plan: type: string billing_cycle: type: string tuition_amount: type: number format: double net_invoice: type: number format: double plan_status: type: string sibling_discount: type: string sibling_discount_amount: type: number format: double sibling_discount_pct: type: string days_to_start_date: type: integer format: int64 parent1_name: type: string siblings: type: string twins: type: string sibling_order: type: integer sibling_twin: type: string active_siblings_in_family: type: integer staff_child: type: string school_color_hex: type: string school_short_name: type: string has_birth_date_alert: type: boolean has_sibling_discount_pct_alert: type: boolean has_missing_sibling_discount_alert: type: boolean has_unexpected_sibling_discount_alert: type: boolean has_not_sibling_with_discount_alert: type: boolean required: - school_id - school_name - student_id - student_first_name - student_last_name - student_name - family_id - status - dob - start_date - withdrawal_date - graduation_date - room - room_id - ems_student_status - program - tuition_plan - billing_cycle - tuition_amount - net_invoice - plan_status - sibling_discount - sibling_discount_amount - sibling_discount_pct - days_to_start_date - parent1_name - siblings - twins - sibling_order - sibling_twin - active_siblings_in_family - staff_child - school_color_hex - school_short_name - has_birth_date_alert - has_sibling_discount_pct_alert - has_missing_sibling_discount_alert - has_unexpected_sibling_discount_alert - has_not_sibling_with_discount_alert description: Sibling Discount. Error: type: object properties: error: type: string description: Human-readable error message. required: - error description: Error. responses: '400': description: Invalid or missing parameters or request body. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: Invalid or missing parameters or request body. '401': description: >- Missing or invalid Bearer token, or an absent, invalid or expired server-side session. The authentication middleware returns plain text with a trailing newline. content: text/plain: schema: type: string examples: missing: value: | missing authorization header invalid: value: | Unauthorized expired: value: | Session expired '403': description: The authenticated session is not allowed to perform this operation. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: >- The authenticated session is not allowed to perform this operation. '404': description: The requested resource was not found in the requested scope. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: The requested resource was not found in the requested scope. '405': description: The path exists but does not support this HTTP method. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: The path exists but does not support this HTTP method. headers: Allow: description: Comma-separated HTTP methods accepted by this path. schema: type: string '500': description: The operation could not be completed. content: application/json: schema: $ref: '#/components/schemas/Error' example: error: The operation could not be completed. securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT description: >- Access token issued by POST /sessions and associated with a valid server-side session. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.