> ## Documentation Index > Fetch the complete documentation index at: https://juo.dev/llms.txt > Use this file to discover all available pages before exploring further. # Add a variant > Used to add a variant to a product. ## OpenAPI ````yaml openapi-admin.json POST /products/{productId}/variants openapi: 3.1.0 info: title: Juo Admin API version: 1.0.0 description: >- Programmatic access to subscription management for merchants. ## Core Resources - **Subscriptions** — the central entity. Belongs to a Customer, contains Items (product variants) and Discounts. Lifecycle: `active` → `paused` or `cancelled`; `paused` → `active` or `cancelled`; `cancelled` → `active` (via reactivate). - **Items** — subscription items (product variants) (quantity, price, billing/delivery policies). - **Discounts** — applied to subscriptions by discount code or manually (percentage or fixed amount, targeting subscription items or shipping). - **Customers** — customers who own subscriptions and payment methods. - **Products / Variants** — catalog products and variants that can be assigned to subscription plans. - **Schedules** — a read-only projection of upcoming billing orders, derived from subscription state, active schedule adjustments, and triggered workflows. **Schedule adjustments never modify the subscription** — they apply changes to upcoming orders matching the specified criteria (by cycle, date, or both), which may cover one or more orders. For permanent changes (billing frequency, items, payment method, delivery address), update the subscription directly. - **Workflows** — interactive customer-facing flows (retention, dunning, onboarding). Contain Steps connected by Transitions and produce Runs on each execution. Supports A/B experiment steps. ## Authentication Every request requires: - `X-Juo-Admin-Api-Key` header — the merchant's Admin API key. - `X-Tenant-ID` header — the store identifier (myshopify domain, e.g. `my-store.myshopify.com`). servers: - url: https://api.juo.io/admin/v1 security: - AdminApiKey: [] - BearerToken: [] tags: - name: subscriptions description: >- Recurring billing agreements with customers. Manage lifecycle (pause, resume, cancel, reactivate), items, and discounts. - name: customers description: Customers who own subscriptions. Create and update customer records. - name: products description: >- Products and variants linked to subscription plans. Manage catalog and plan assignments. - name: schedules description: >- Read-only view of upcoming billing orders generated from subscription state, schedule adjustments, and workflows. Use schedule adjustments for targeted changes to upcoming orders (scoped by cycle number, date, or both) — they never alter the subscription itself. For permanent changes (billing frequency, items, payment method), update the subscription directly. - name: workflows description: >- Interactive customer-facing flows for retention, dunning, and onboarding. Define steps, publish, and track execution runs and experiments. paths: /products/{productId}/variants: post: tags: - products summary: Add a variant to a product description: >- Creates and adds a new variant (e.g., size or color) to an existing product in the e-commerce platform. parameters: - schema: minLength: 1 type: string in: path name: productId required: true description: The product identifier - $ref: '#/components/parameters/TenantHeader' requestBody: content: application/json: schema: type: object properties: price: type: number compareAtPrice: type: number sku: type: string barcode: type: string optionValues: type: array items: type: object properties: optionName: minLength: 1 type: string name: minLength: 1 type: string required: - optionName - name required: - price required: true responses: '201': description: Default Response content: application/json: schema: $ref: '#/components/schemas/ProductVariant' '400': description: >- Bad request — invalid input or violated business rule (e.g., wrong subscription status for the requested operation). '401': description: Unauthorized — missing, expired, or invalid API key. '403': description: Forbidden — authenticated but not permitted to access this resource. '404': description: >- Not found — the resource does not exist or belongs to a different tenant. '422': description: >- Unprocessable entity — well-formed request that fails semantic validation. components: parameters: TenantHeader: name: X-Tenant-ID x-speakeasy-name-override: tenant x-speakeasy-globals-hidden: true in: header schema: type: string required: true description: >- Unique identifier of the tenant in the system (usually a store identifier) schemas: ProductVariant: type: object properties: id: minLength: 1 type: string title: minLength: 1 type: string image: oneOf: - type: 'null' - type: object properties: id: minLength: 1 type: string url: format: uri type: string altText: minLength: 1 type: - 'null' - string required: - id - url - altText price: type: number purchaseOptions: type: array items: type: object properties: name: minLength: 1 type: string price: type: number interval: type: object properties: intervalCount: type: number interval: type: string enum: - DAY - MONTH - WEEK - YEAR required: - intervalCount - interval required: - name - price - interval product: description: >- Product `id` when not expanded, or the full `Product` object when the field name is included in the `expand` query parameter. anyOf: - minLength: 1 type: string - $ref: '#/components/schemas/Product' planGroups: description: Subscription plan group IDs associated with this variant type: array items: minLength: 1 type: string required: - id - title - image - price - purchaseOptions - product - planGroups title: ProductVariant Product: type: object properties: id: minLength: 1 type: string title: minLength: 1 type: string image: oneOf: - type: 'null' - type: object properties: id: minLength: 1 type: string url: format: uri type: string altText: minLength: 1 type: - 'null' - string required: - id - url - altText collections: type: array items: type: object properties: handle: minLength: 1 type: string required: - handle planGroups: description: Subscription plan group IDs associated with this product type: array items: minLength: 1 type: string required: - id - title - image - collections - planGroups title: Product securitySchemes: AdminApiKey: type: apiKey name: X-Juo-Admin-Api-Key in: header description: >- Long-lived Admin API key issued from the Juo merchant portal. Pass as the `X-Juo-Admin-Api-Key` header. BearerToken: type: http scheme: bearer bearerFormat: JWT description: >- Short-lived JWT minted via the merchant browser-session flow. Carries the authenticated staff identity so that API calls are attributed to the specific staff user in the activity log. ````