> ## 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 child account > Create a new child customer account. For standalone customers, creates a parent/child hierarchy first. Requires ADMIN role. ## OpenAPI ````yaml /v2/buyer-api-v2.yaml post /accounts/create-child 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: /accounts/create-child: servers: - url: https://api.interchange.io/api/v2 description: Production server post: tags: - Account summary: Create child account description: >- Create a new child customer account. For standalone customers, creates a parent/child hierarchy first. Requires ADMIN role. operationId: createChildAccount requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/CreateChildAccountBody' responses: '201': description: Create child account content: application/json: schema: $ref: '#/components/schemas/CreateChildAccountResponse' '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: $ref: '#/components/schemas/ErrorResponse' security: - bearerAuth: [] components: schemas: CreateChildAccountBody: description: Request body for creating a child customer account type: object properties: name: description: Name for the new child account example: Nike type: string minLength: 1 maxLength: 255 customerRole: description: Whether the account is a buyer or seller example: BUYER type: string enum: - BUYER - SELLER parentName: description: >- Name for the parent account created during standalone conversion. Defaults to "{company} (Admin)" if omitted. example: Acme HQ type: string minLength: 1 maxLength: 255 customerDomain: description: >- Registered organization domain. For SELLER accounts, also seeds the auto-created storefront's publisher and operator domain. example: nike.com type: string maxLength: 255 pattern: ^[a-z0-9]([a-z0-9-]*[a-z0-9])?(\.[a-z0-9]([a-z0-9-]*[a-z0-9])?)+$ defaultCurrency: description: >- For SELLER accounts, seller-confirmed primary settlement currency (ISO-4217) for the auto-created storefront. example: USD type: string pattern: ^[A-Z]{3}$ paymentCurrencies: description: >- For SELLER accounts, ISO-4217 currencies the auto-created storefront will be paid in. The primary defaultCurrency must be included when both are provided. example: - USD - EUR maxItems: 25 type: array items: type: string pattern: ^[A-Z]{3}$ accountMode: description: >- Internal account provisioning mode. DEMO is restricted to Scope3 platform administrators and provisions a leased synthetic Storefront. example: STANDARD default: STANDARD type: string enum: - STANDARD - DEMO demoRecipeIds: description: >- Versioned synthetic source recipes to attach when accountMode is DEMO. example: - sample-publisher-display - sample-publisher-ctv - sample-retail-media minItems: 1 maxItems: 3 type: array items: type: string enum: - sample-publisher-display - sample-publisher-ctv - sample-retail-media required: - name - customerRole CreateChildAccountResponse: description: Full user context scoped to the new child customer type: object properties: user: description: User profile data type: object properties: {} additionalProperties: {} customer: description: Customer context for the newly created child type: object properties: {} additionalProperties: {} customers: description: All accessible customer accounts type: array items: type: object properties: {} additionalProperties: {} showTosBox: description: Whether to show the ToS acceptance dialog type: boolean canAcceptTos: description: >- Whether the current user may accept Terms of Service for the organization governing this child. type: boolean tosUpdate: description: Successor Terms of Service context inherited from the organization. type: object properties: action: type: string enum: - notice - acceptance_due - acceptance_required changeLevel: type: string enum: - PATCH - MINOR - MAJOR acceptedVersion: nullable: true type: string targetVersion: type: string deadline: nullable: true 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))$ termsUrl: type: string changesUrl: nullable: true type: string required: - action - changeLevel - acceptedVersion - targetVersion - deadline - termsUrl - changesUrl additionalProperties: false organizationContractMissing: description: >- True when the newly created account cannot operate because the organization it inherits from has no active contract. UI should render a block page until an organization admin accepts ToS. type: boolean hasContract: description: Whether the customer has an active contract type: boolean latestTosVersion: description: Latest embedded sales agent version identifier type: string convertedFromStandalone: description: True if the request triggered a standalone-to-parent conversion type: boolean required: - user - customer - customers - showTosBox - canAcceptTos - hasContract - latestTosVersion - convertedFromStandalone 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 ````