> ## Documentation Index > Fetch the complete documentation index at: https://docs.interchange.io/llms.txt > Use this file to discover all available pages before exploring further. # Create a house-scoped discount row > Create a discount scoped to a corporate house domain. The house_domain is unique per storefront — a duplicate returns 409; use PATCH to update an existing row. ## OpenAPI ````yaml /v2/storefront-api-v2.yaml post /house-discounts openapi: 3.0.0 info: title: Scope3 Storefront API version: 2.0.0 description: |- REST API for partners to manage storefronts, inventory sources, and billing. ## Authentication All endpoints require a Bearer token in the Authorization header: ``` Authorization: Bearer your-api-key ``` ## Base URL `https://api.interchange.io/api/v2/storefront` ## For AI Agents AI agents can use the MCP endpoint at `/mcp/v2/storefront` with three tools: - `initialize`: Start an MCP session - `api_call`: Make REST API calls - `ask_about_capability`: Learn about API features servers: - url: https://api.interchange.io/api/v2/storefront description: Production server security: [] tags: - name: Account description: Account management, service tokens, and preferences - name: Storefront description: Manage storefront and inventory sources - name: Storefront Agents description: List and manage registered sales, signals, and outcomes agents - name: Storefront Activity description: Audit log of configuration and inventory changes on the storefront - name: Storefront Billing description: Stripe Connect billing for storefronts - name: AI Usage description: Storefront AI token usage visibility by model - name: MCP description: Model Context Protocol endpoints paths: /house-discounts: post: tags: - Storefront summary: Create a house-scoped discount row description: >- Create a discount scoped to a corporate house domain. The house_domain is unique per storefront — a duplicate returns 409; use PATCH to update an existing row. operationId: createHouseDiscount requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CreateHouseDiscountBody' responses: '201': description: Create a house-scoped discount row content: application/json: schema: $ref: '#/components/schemas/HouseDiscountResponse' '400': description: Bad request content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '409': description: >- A house discount already exists for this house_domain on the storefront. Use PATCH to update it. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - bearerAuth: [] components: schemas: CreateHouseDiscountBody: description: >- Request body for creating a house-scoped discount. house_domain is unique per storefront — a duplicate fails with a conflict; use PATCH to update it. type: object properties: houseDomain: description: >- Lowercase corporate house domain (e.g. "nike.com"). A buy is matched to this row when its advertiser brand resolves up its hierarchy to this house — so a discount on "nike.com" applies to a converse.com buy. example: nike.com type: string minLength: 1 maxLength: 253 discountPercent: description: >- Discount percent off the storefront quote for buys whose advertiser resolves to this house. 0–100. The larger of this and any buyer-specific discount wins; the quote is floored at the wholesale cost. example: 20 type: number minimum: 0 maximum: 100 notes: description: >- Freeform operator notes for this house discount (e.g. "Negotiated 2026 Nike-house rate"). Null = no notes. nullable: true type: string maxLength: 2000 required: - houseDomain - discountPercent - notes HouseDiscountResponse: description: A single house-scoped buyer-discount row. type: object properties: id: description: Surrogate id (BIGINT serialized as string). example: '17' type: string storefrontId: description: Storefront the row belongs to (BIGINT serialized as string). example: '1234' type: string houseDomain: type: string discountPercent: type: number notes: nullable: true type: string createdAt: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ updatedAt: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ createdBy: nullable: true type: string required: - id - storefrontId - houseDomain - discountPercent - notes - createdAt - updatedAt - createdBy additionalProperties: false ErrorResponse: description: Standard error response type: object properties: data: type: string nullable: true enum: - null error: $ref: '#/components/schemas/ApiError' required: - data - error additionalProperties: false ApiError: description: Structured error object type: object properties: code: description: Machine-readable error code type: string message: description: Human-readable error message type: string field: description: Field path associated with the error type: string details: description: Additional error context type: object additionalProperties: {} required: - code - message additionalProperties: false securitySchemes: bearerAuth: type: http scheme: bearer description: API key or access token ````