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

# List Customers



## OpenAPI

````yaml GET /customers
openapi: 3.0.3
info:
  title: Echo API
  description: |
    Echo is a voice notification platform. Use your API key (returned on signup)
    in the `x-api-key` header for all `/v1/*` endpoints.

    The API key implicitly scopes every request to your project and business —
    no need to pass IDs in the URL.
  version: 1.0.0
servers:
  - url: https://api.meetecho.ai/v1
    description: Production
security: []
tags:
  - name: Auth
    description: Signup, login, token refresh
  - name: Customers
    description: Manage customers within your project
  - name: Agents
    description: Manage reusable voice agents
  - name: Notifications
    description: Trigger and inspect outbound calls
  - name: API Keys
    description: Create and revoke API keys for your project
  - name: Project
    description: Inspect and configure your project settings
  - name: Webhook Endpoints
    description: >-
      Create and manage webhook endpoints — each with its own URL, event
      subscriptions, and signing secret
  - name: Delivery Logs
    description: >-
      Inspect delivery history, per-attempt details, and manually retry failed
      deliveries
paths:
  /customers:
    get:
      tags:
        - Customers
      summary: List customers
      responses:
        '200':
          description: Array of customers
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/Customer'
              example:
                - id: 8cc6199f-9466-46f2-9db7-936f3c2c1c0b
                  created_at: '2026-03-18T16:51:03.253Z'
                  project_id: e56b4c35-882d-4604-9944-9763d314ea59
                  external_id: cust_001
                  first_name: John
                  last_name: Smith
                  metadata:
                    location: Worldwideee
                  phones:
                    - id: 270f9e3e-37b8-463d-a57f-448990fed179
                      created_at: '2026-03-18T16:51:03.253Z'
                      customer_id: 8cc6199f-9466-46f2-9db7-936f3c2c1c0b
                      value: '+971123456789'
                      is_primary: true
                      status: active
      security:
        - ApiKey: []
components:
  schemas:
    Customer:
      type: object
      properties:
        id:
          type: string
          format: uuid
          example: 8cc6199f-9466-46f2-9db7-936f3c2c1c0b
        project_id:
          type: string
          format: uuid
          example: e56b4c35-882d-4604-9944-9763d314ea59
        external_id:
          type: string
          example: cust_001
        first_name:
          type: string
          example: John
        last_name:
          type: string
          example: Smith
        metadata:
          type: object
          nullable: true
          example:
            location: Worldwideee
        phones:
          type: array
          items:
            $ref: '#/components/schemas/CustomerPhone'
        created_at:
          type: string
          format: date-time
          example: '2026-03-18T16:51:03.253Z'
    CustomerPhone:
      type: object
      properties:
        id:
          type: string
          format: uuid
          example: 270f9e3e-37b8-463d-a57f-448990fed179
        customer_id:
          type: string
          format: uuid
          example: 8cc6199f-9466-46f2-9db7-936f3c2c1c0b
        value:
          type: string
          example: '+971123456789'
        is_primary:
          type: boolean
          example: true
        status:
          type: string
          enum:
            - active
            - inactive
          example: active
        created_at:
          type: string
          format: date-time
          example: '2026-03-18T16:51:03.253Z'
  securitySchemes:
    ApiKey:
      type: apiKey
      in: header
      name: x-api-key
      description: 'Echo API key — format: `echo_<64 hex chars>`. Returned once on signup.'

````