> ## 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. # Preview a modular avails file > Parse a CSV, XLS, or XLSX modular avails file and return normalized rows and stable row-level diagnostics. This endpoint never commits inventory; submit the returned avails to the JSON avails-feed endpoint with confirmed=true after operator review. ## OpenAPI ````yaml /v2/storefront-api-v2.yaml post /inventory-sources/{sourceId}/modular/avails-feed/upload 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: Payout bank details and billing configuration for storefronts - name: AI Usage description: Storefront AI token usage visibility by model - name: MCP description: Model Context Protocol endpoints paths: /inventory-sources/{sourceId}/modular/avails-feed/upload: post: tags: - Storefront summary: Preview a modular avails file description: >- Parse a CSV, XLS, or XLSX modular avails file and return normalized rows and stable row-level diagnostics. This endpoint never commits inventory; submit the returned avails to the JSON avails-feed endpoint with confirmed=true after operator review. operationId: previewModularInventorySourceAvailsUpload parameters: - in: path name: sourceId schema: description: Inventory source ID type: string minLength: 1 required: true description: Inventory source ID requestBody: required: true content: multipart/form-data: schema: $ref: '#/components/schemas/UploadModularAvailsFeedBody' responses: '200': description: Preview a modular avails file content: application/json: schema: $ref: '#/components/schemas/ModularAvailsPreview' '400': description: Unsupported, oversized, or malformed upload content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - bearerAuth: [] components: schemas: UploadModularAvailsFeedBody: type: object properties: file: format: binary description: CSV, XLS, or XLSX file, up to 10 MB. type: string required: - file ModularAvailsPreview: type: object properties: previewOnly: type: boolean enum: - true inputSource: type: string parsedAvailCount: type: integer minimum: 0 maximum: 9007199254740991 rejectedRowCount: type: integer minimum: 0 maximum: 9007199254740991 warningCount: type: integer minimum: 0 maximum: 9007199254740991 avails: type: array items: type: object properties: collectionId: type: string minLength: 1 collectionName: type: string minLength: 1 collectionDescription: nullable: true type: string channel: nullable: true type: string availId: type: string minLength: 1 name: type: string minLength: 1 startTime: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ endTime: 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))$ impressionsCapacity: type: integer minimum: 0 maximum: 9007199254740991 upstreamBookedImpressions: type: integer minimum: 0 maximum: 9007199254740991 cpm: type: number minimum: 0 currency: type: string minLength: 3 maxLength: 3 targeting: type: object additionalProperties: {} sourceMetadata: type: object additionalProperties: {} required: - collectionId - collectionName - availId - name - startTime - endTime - impressionsCapacity additionalProperties: false rejectedRows: type: array items: type: object properties: rowNumber: type: integer maximum: 9007199254740991 minimum: 1 rawRow: type: object additionalProperties: {} diagnostics: minItems: 1 type: array items: type: object properties: rowNumber: type: integer maximum: 9007199254740991 minimum: 1 field: type: string minLength: 1 code: type: string enum: - REQUIRED_FIELD_MISSING - INVALID_DATE_TIME - INVALID_NUMBER - GROSS_CAPACITY_NORMALIZED message: type: string minLength: 1 required: - rowNumber - code - message additionalProperties: false required: - rowNumber - rawRow - diagnostics additionalProperties: false warnings: type: array items: type: object properties: rowNumber: type: integer maximum: 9007199254740991 minimum: 1 field: type: string minLength: 1 code: type: string enum: - REQUIRED_FIELD_MISSING - INVALID_DATE_TIME - INVALID_NUMBER - GROSS_CAPACITY_NORMALIZED message: type: string minLength: 1 required: - rowNumber - code - message additionalProperties: false note: type: string required: - previewOnly - inputSource - parsedAvailCount - rejectedRowCount - warningCount - avails - rejectedRows - warnings - note 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 ````