> ## 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. # Auto-select products > Automatically select products for a performance campaign using a 3-tier strategy (scoring → measurability → CPM heuristic). Campaign must be in DRAFT status. Supports iterative refinement via ADCP-style refine directives — review results then re-call with include/omit/more_like_this to adjust selections. Replaces all previously selected products. ## OpenAPI ````yaml /v2/buyer-api-v2.yaml post /campaigns/{campaignId}/auto-select-products openapi: 3.0.0 info: title: Scope3 Buyer API version: 2.0.0 description: |- REST API for advertisers to manage advertisers, campaigns, and reporting. ## Authentication All endpoints require a Bearer token in the Authorization header: ``` Authorization: Bearer your-api-key ``` ## Base URL `https://api.interchange.io/api/v2/buyer` ## For AI Agents AI agents can use the MCP endpoint at `/mcp/v2/buyer` 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/buyer description: Production server security: [] tags: - name: Signup description: Request reviewed access to Interchange - name: Account description: Account management, service tokens, and preferences - name: Asks description: >- What you are waiting on Scope3 for — support, product, and supply asks in one list - name: Advertisers description: Manage advertisers - name: Product Discovery description: Discover and select products - name: Campaigns description: Manage advertising campaigns - name: Creatives description: Build, manage, and sync campaign creatives via AdCP Creative Protocol - name: Reporting description: Access performance metrics - name: Event Sources description: >- Manage event source configurations and log conversion/marketing events for attribution - name: Property Lists description: Validate property lists against AAO registry - name: Sales Agents description: View and connect sales agents - name: Measurement description: Measurement sources, records, context, and freshness - name: Syndication description: Syndicate resources to ADCP agents - name: Tasks description: Track async operation status - name: Buyer Billing description: >- Consolidated invoicing for buyers — invoices and pending invoice items issued by Scope3 across the buyer customer. - name: MCP description: Model Context Protocol endpoints for AI agents paths: /campaigns/{campaignId}/auto-select-products: post: tags: - Campaigns summary: Auto-select products description: >- Automatically select products for a performance campaign using a 3-tier strategy (scoring → measurability → CPM heuristic). Campaign must be in DRAFT status. Supports iterative refinement via ADCP-style refine directives — review results then re-call with include/omit/more_like_this to adjust selections. Replaces all previously selected products. operationId: autoSelectProducts parameters: - in: path name: id schema: description: Unique identifier for the campaign example: cmp_987654321 type: string minLength: 1 required: true description: Unique identifier for the campaign requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/AutoSelectProductsRequest' responses: '200': description: Auto-select products content: application/json: schema: $ref: '#/components/schemas/AutoSelectProductsResponse' '400': description: Bad request 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: AutoSelectProductsRequest: description: >- Optional refinement parameters for iterative auto-select product selection. Based on ADCP refine spec. type: object properties: refine: description: >- Array of refinement directives from a previous auto-select response. Supports request-scoped direction and product-scoped include/omit/more_like_this actions. minItems: 1 type: array items: $ref: '#/components/schemas/RefinementItem' maxProducts: description: Maximum number of products to select example: 5 type: integer maximum: 9007199254740991 minimum: 1 minBudgetPerProduct: description: Minimum budget to allocate per product example: 500 type: number minimum: 0 exclusiveMinimum: true additionalProperties: false AutoSelectProductsResponse: description: Response from auto-selecting products for a performance campaign type: object properties: campaignId: description: Campaign ID type: string discoveryId: description: Discovery session ID containing the selected products type: string selectedProducts: description: Products selected and added to the discovery session type: array items: type: object properties: productId: type: string name: type: string salesAgentId: type: string groupId: type: string groupName: type: string cpm: type: number budget: type: number pricingOptionId: type: string required: - productId - name - salesAgentId - groupId - groupName - budget additionalProperties: false budgetContext: description: Budget allocation summary type: object properties: campaignBudget: type: number totalAllocated: type: number remainingBudget: type: number currency: type: string required: - campaignBudget - totalAllocated - remainingBudget - currency additionalProperties: false productCount: description: Total number of products selected type: integer minimum: 0 maximum: 9007199254740991 previouslySelectedCount: description: >- Number of previously selected products that were replaced by auto-select type: integer minimum: 0 maximum: 9007199254740991 required: - campaignId - discoveryId - selectedProducts - budgetContext - productCount 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 RefinementItem: description: A single refinement directive (request-scoped or product-scoped) oneOf: - description: 'Request-scoped refinement: direction for the overall selection' type: object properties: scope: description: Applies direction to the overall selection type: string enum: - request ask: description: >- Free-text direction for the overall selection, e.g. "more video options and less display" type: string minLength: 1 required: - scope - ask - description: 'Product-scoped refinement: target a specific product' type: object properties: scope: description: Targets a specific product from a prior auto-select response type: string enum: - product id: description: Product ID from a prior auto-select response type: string minLength: 1 action: description: >- include: keep this product; omit: exclude it; moreLikeThis: find similar products type: string enum: - include - omit - moreLikeThis ask: description: Optional direction when action is include or more_like_this type: string minLength: 1 required: - scope - id - action type: object 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 ````