> ## Documentation Index > Fetch the complete documentation index at: https://docs.voucherify.io/llms.txt > Use this file to discover all available pages before exploring further. # Update program reward assignment > ⚠️ **BETA endpoint** This is a work-in-progress documentation of a BETA endpoint. The parameters, fields, request and response bodies, and other data may subject to change. If you want to share feedback or improvements, contact Voucherify support or your Technical Account Manager. Updates the stock configuration of a reward assigned to a program. Returns the updated reward assignment. ## OpenAPI ````yaml /openapi/loyalties-v2.json put /v2/loyalties/programs/{programId}/rewards/{rewardId} openapi: 3.1.0 info: title: Voucherify Loyalty v2 API version: 2.0.0 description: >- Complete OpenAPI specification for the Voucherify Loyalty v2 API. All endpoints require the LOYALTY_V2 feature flag. Combined from per-domain specs: programs.yaml, members.yaml, program-operations.yaml, card-definitions.yaml, earning-rules.yaml, tier-structures.yaml, benefits.yaml, rewards.yaml, examine.yaml servers: - url: '{protocol}://{host}' variables: protocol: default: https enum: - https - http host: default: api.voucherify.io security: - bearerAuth: [] X-App-Id: [] X-App-Token: [] tags: - name: Programs description: >- Loyalty program CRUD, lifecycle management, program-scoped resource assignments (card definitions, earning rules, rewards, tier structures), member management (create, list, get, activate, deactivate, delete), card operations (points adjustment, pending points, expiring points, transactions), reward purchases, and activity history. - name: Card Definitions description: >- CRUD operations, lifecycle management, and activity history for card definitions. Card definitions describe the configuration for loyalty cards, including code generation, points expiration, earning/spending limits, pending points, refunds, and balance settings. - name: Earning Rules description: >- Manage earning rules that define how customers earn points or receive incentives based on triggers (events, segments, custom events). Includes CRUD, lifecycle, and activity history. - name: Tier Structures description: >- CRUD operations, lifecycle management, and activity history for tier structures. Includes nested tier definitions (create, list, update, delete) within tier structures. Tier structures define the tiering model for loyalty programs — how members qualify for and move between tiers. - name: Benefits description: >- Manage benefit definitions (fixed points, proportional points, material, digital). Includes CRUD, lifecycle transitions, and activity history. - name: Rewards description: >- CRUD, lifecycle operations, and activity history for reward definitions. Rewards can be material (product/SKU) or digital (discount coupons, gift vouchers). - name: Examine description: >- Evaluation endpoints that estimate earning opportunities and reward availability for a customer across their loyalty program memberships, without side effects. paths: /v2/loyalties/programs/{programId}/rewards/{rewardId}: put: tags: - Programs summary: Update program reward assignment description: > ⚠️ **BETA endpoint** This is a work-in-progress documentation of a BETA endpoint. The parameters, fields, request and response bodies, and other data may subject to change. If you want to share feedback or improvements, contact Voucherify support or your Technical Account Manager. Updates the stock configuration of a reward assigned to a program. Returns the updated reward assignment. operationId: updateProgramRewardAssignment parameters: - name: programId in: path required: true description: Unique program identifier. schema: type: string pattern: ^lprg_[a-f0-9]+$ - name: rewardId in: path required: true description: Unique reward identifier. schema: type: string pattern: ^lrew_[a-f0-9]+$ requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ProgramRewardAssignmentUpdateRequest' responses: '200': description: The updated reward assignment. content: application/json: schema: $ref: '#/components/schemas/ProgramRewardAssignment' '400': description: >- Validation error - request body or query parameters failed validation, or the operation is not allowed in the current resource state. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '404': description: Resource not found. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '409': description: Conflict - e.g. duplicate resource or invalid state transition. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' components: schemas: ProgramRewardAssignmentUpdateRequest: type: object description: >- Payload for updating the stock configuration of a reward assigned to a program. properties: stock: $ref: '#/components/schemas/ProgramRewardAssignmentStock' required: - stock minProperties: 1 additionalProperties: false ProgramRewardAssignment: type: object description: >- A reward assigned to a program, with stock configuration and redemption counter. properties: reward_id: type: string description: Unique reward identifier. pattern: ^lrew_[a-f0-9]+$ stock: $ref: '#/components/schemas/ProgramRewardAssignmentStock' description: Stock configuration of the assignment. redeemed: type: number description: >- Number of times the reward has been redeemed within the program. Defaults to 0. created_at: type: string format: date-time description: Assignment creation timestamp (ISO 8601). updated_at: type: - string - 'null' format: date-time description: Last update timestamp (ISO 8601), or null when never updated. object: type: string description: Object type marker. const: program_reward ErrorResponse: type: object description: Standard error response returned by all Loyalty v2 endpoints. properties: code: type: integer description: HTTP status code of the error. key: type: string description: Machine-readable error key. message: type: string description: Human-readable error message. details: type: string description: Additional details about the error. request_id: type: string description: Identifier of the request that produced the error. ProgramRewardAssignmentStock: type: object description: > Reward stock configuration. When `type` is `UNLIMITED`, `limited` must not be provided. When `type` is `LIMITED`, `limited` is required. properties: type: type: string description: Stock type. enum: - UNLIMITED - LIMITED limited: description: >- Limited stock details. Required when `type` is `LIMITED`; must not be provided when `type` is `UNLIMITED`. oneOf: - $ref: '#/components/schemas/ProgramRewardAssignmentStockLimited' - type: 'null' required: - type additionalProperties: false allOf: - if: properties: type: const: UNLIMITED then: not: required: - limited - if: properties: type: const: LIMITED then: required: - limited properties: limited: $ref: '#/components/schemas/ProgramRewardAssignmentStockLimited' ProgramRewardAssignmentStockLimited: type: object description: Limited stock configuration. properties: quantity: type: integer description: Available stock quantity. minimum: 0 maximum: 9007199254740991 required: - quantity additionalProperties: false securitySchemes: bearerAuth: type: http scheme: bearer bearerFormat: JWT X-App-Id: type: apiKey name: X-App-Id in: header X-App-Token: type: apiKey name: X-App-Token in: header ````