> ## 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.

# Decide one buyer account source mapping

> Create or replace the version-guarded source decision for one approved account relationship. Bind a source-native account, or explicitly confirm not_required when the source contract is unscoped.



## OpenAPI

````yaml /v2/storefront-api-v2.yaml post /account-mappings/accounts/{accountId}/sources/{inventorySourceKey}/decision
openapi: 3.0.0
info:
  title: Scope3 Storefront API
  version: 2.0.0
  description: >-
    REST API for partners to manage Seller Accounts, 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: Asks
    description: >-
      What you are waiting on Scope3 for — support, product, and supply asks in
      one list
  - 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 Seller Accounts
  - name: AI Usage
    description: Seller Account AI token usage visibility by model
  - name: MCP
    description: Model Context Protocol endpoints
paths:
  /account-mappings/accounts/{accountId}/sources/{inventorySourceKey}/decision:
    post:
      tags:
        - Storefront
      summary: Decide one buyer account source mapping
      description: >-
        Create or replace the version-guarded source decision for one approved
        account relationship. Bind a source-native account, or explicitly
        confirm not_required when the source contract is unscoped.
      operationId: decideSellerAccountSourceMapping
      parameters:
        - in: path
          name: accountId
          schema:
            type: string
            minLength: 1
            maxLength: 255
          required: true
        - in: path
          name: inventorySourceKey
          schema:
            type: string
            minLength: 1
            maxLength: 255
          required: true
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/DecideSellerAccountSourceBody'
      responses:
        '200':
          description: Decide one buyer account source mapping
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/SellerAccountSourceDecision'
        '400':
          description: Bad request
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '401':
          description: Unauthorized
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '404':
          description: >-
            Approved account relationship or active inventory source not found
            for this storefront.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ErrorResponse'
        '409':
          description: Source mapping version changed concurrently.
          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:
    DecideSellerAccountSourceBody:
      description: >-
        Map one approved seller account relationship to a source-native account,
        or explicitly confirm that the source contract does not require one.
        expectedVersion is 0 for the first decision and the current binding
        version for a replacement.
      oneOf:
        - type: object
          properties:
            expectedVersion:
              type: integer
              minimum: 0
              maximum: 2147483647
            decision:
              type: string
              enum:
                - not_required
          required:
            - expectedVersion
            - decision
          additionalProperties: false
        - type: object
          properties:
            expectedVersion:
              type: integer
              minimum: 0
              maximum: 2147483647
            decision:
              type: string
              enum:
                - bound
            sourceExternalAccountId:
              type: string
              minLength: 1
              maxLength: 255
          required:
            - expectedVersion
            - decision
            - sourceExternalAccountId
          additionalProperties: false
      type: object
    SellerAccountSourceDecision:
      type: object
      properties:
        accountId:
          type: string
        inventorySourceKey:
          type: string
        decision:
          type: string
          enum:
            - bound
            - not_required
        sourceExternalAccountId:
          nullable: true
          type: string
        version:
          type: integer
          maximum: 9007199254740991
          minimum: 1
      required:
        - accountId
        - inventorySourceKey
        - decision
        - sourceExternalAccountId
        - version
      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

````