> ## Documentation Index
> Fetch the complete documentation index at: https://docs.streamlinedpayments.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Add members to group

> **Add-only.** Each customer in `customer_uuids` is added to the group.
Customers already in the group are no-ops. Customers in another group are
moved into this one. Members not named in the request are NOT touched.
All-or-nothing: any unknown or cross-company uuid fails the entire request
(no partial application).




## OpenAPI

````yaml /api-reference/openapi.yaml post /customer_groups/{uuid}/members
openapi: 3.0.3
info:
  title: Streamlined API
  description: >
    Access customers, customer applications, customer groups, products, payouts,
    invoices, transactions, and deposit links programmatically through this API,
    and receive webhooks when deposit links change. All requests must be
    authenticated with an API key.
  version: 1.6.0
  license:
    name: Proprietary
    url: https://streamlinedpayments.com/terms
servers:
  - url: https://api.staging.streamlinedpayments.com/api/v1
    description: Sandbox
  - url: https://api.streamlinedpayments.com/api/v1
    description: Production
security:
  - AppIdAuth: []
    ApiKeyAuth: []
tags:
  - name: Customers
    description: Create, update and delete the businesses you sell to.
  - name: Customer applications
    description: >-
      List the applications your customers submit, and approve them. Approving
      can also set net terms and export the customer to Shopify. See [Approve
      customer applications](/guides/customer-applications).
  - name: Customer groups
    description: >-
      Organize customers into groups and manage who's in each one. A group can
      be linked to a Shopify B2B company.
  - name: Customer files
    description: Upload and manage files attached to a customer.
  - name: Customer addresses
    description: Manage a customer's addresses and choose their default billing address.
  - name: Orders
    description: Create orders, add and remove line items, and schedule them.
  - name: Invoices
    description: Create invoices from orders, then list, look up and update them.
  - name: Transactions
    description: List transactions and look one up.
  - name: Payouts
    description: List payouts, including pending ones, and look one up.
  - name: Products
    description: >-
      Create and update the products and services you sell, import them in bulk,
      and merge duplicates.
  - name: Deposit links
    description: Collect money from a customer before an invoice exists.
  - name: Webhooks
    description: >-
      Register HTTPS endpoints to receive events when something changes. See
      [Webhooks](/guides/webhooks) for signatures, retries and delivery
      guarantees.
paths:
  /customer_groups/{uuid}/members:
    parameters:
      - name: uuid
        in: path
        required: true
        schema:
          type: string
          format: uuid
    post:
      tags:
        - Customer groups
      summary: Add members to group
      description: >
        **Add-only.** Each customer in `customer_uuids` is added to the group.

        Customers already in the group are no-ops. Customers in another group
        are

        moved into this one. Members not named in the request are NOT touched.

        All-or-nothing: any unknown or cross-company uuid fails the entire
        request

        (no partial application).
      operationId: addCustomerGroupMembers
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              required:
                - customer_uuids
              properties:
                customer_uuids:
                  type: array
                  items:
                    type: string
                    format: uuid
      responses:
        '200':
          description: Updated member list
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/CustomerGroupMembers'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          description: Customer group not found
        '422':
          description: One or more customer uuids unknown or belong to another company
          content:
            application/json:
              schema:
                type: object
                properties:
                  errors:
                    type: array
                    items:
                      type: string
components:
  schemas:
    CustomerGroupMembers:
      type: object
      properties:
        members:
          type: array
          items:
            type: object
            properties:
              uuid:
                type: string
                format: uuid
              company_name:
                type: string
    Error:
      type: object
      properties:
        error:
          type: string
        message:
          type: string
  responses:
    Unauthorized:
      description: Authentication failed
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
          examples:
            AuthenticationRequired:
              value:
                error: Authentication required
                message: >-
                  API endpoint requires authentication. Please provide valid
                  X-App-Id and X-Api-Key headers.
            InvalidCredentials:
              value:
                error: Invalid credentials
                message: >-
                  The provided API credentials are invalid. Please check your
                  X-App-Id and X-Api-Key values.
  securitySchemes:
    AppIdAuth:
      type: apiKey
      in: header
      name: X-App-Id
      description: App ID for authentication
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-Api-Key
      description: API Key for authentication

````

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